SYSTEM AND METHOD FOR DIRECT LIQUID COOLING (DLC) OF A SELF-ADDRESSING IT INFRASTRUCTURE

Abstract

The invention relates to an arrangement for the direct liquid cooling (DLC) of an IT infrastructure, wherein the arrangement comprises at least one IT rack (1) with a plurality of slots (2) for plug-in devices (2.1) of a direct liquid cooling (DLC) and / or an IT infrastructure, wherein the arrangement comprises a bus system (40) with a control unit (9) which has a bus (41) with a plurality of data interfaces (42) for connecting plug-in devices (2.1) of a direct liquid cooling (DLC), characterized in that the bus system (40) has self-addressing for plug-in devices (2.1) of a direct liquid cooling (DLC) that can be connected to the bus (41).

Description

The present disclosure relates to a system and method for direct liquid cooling (DLC) of an IT infrastructure. An arrangement of this type is known from US 2007 / 0 274 043 A1. Similar arrangements are described in US 2007 / 0 274 043 A1, U.S. Pat. No. 11 395 443 B2, U.S. Pat. No. 2022 / 0 330 459 A1, U.S. Pat. No. 2014 / 0 238 065 A1 and U.S. Pat. No. 2022 / 0 003 9291 A1.DE 10 2010 009 775 A1 discloses a switchgear cabinet monitoring device having a control device which is connected via a field bus to various sensors and / or actuators for monitoring and controlling different switchgear cabinet functions, such as air conditioning, moisture control, access control, and wherein the bus system has self-addressing for devices which can be connected to the bus.DE 10 2024 111 073 B3 describes a further arrangement for the direct liquid cooling (DLC) of an IT infrastructure, wherein the arrangement has a housing or an IT rack with a plurality of inserts, arranged one above the other in the height direction of the housing or the IT rack, for insertion devices of a direct liquid cooling (DLC) and / or an IT infrastructure. One of the inserts is a control module that is inserted into one of the inserts and is configured to control at least one second direct liquid cooling (DLC) insert that is inserted into another of the inserts. The second plug-in device is connected via a data bus to the control module for signal transmission.In the field of direct liquid cooling (DLC) of IT infrastructures, it is common for cooling systems to be used to efficiently remove the heat generated by IT equipment. These systems typically include coolant distribution units (CDUs), pump units (RPUs), and various types of heat exchangers integrated into IT racks. Known systems, as described in US 2007 / 0 274 043 A1, often use complex piping systems and manual configuration processes to ensure cooling. These systems require significant manual intervention and are susceptible to errors that may be caused by human failure. Moreover, they are often not modular, which makes maintenance and replacement of components more difficult.According to U.S. Pat. No. 11 395 443 B2, known DLC systems often comprise a multiplicity of sensors and control units which are used for monitoring and controlling the cooling processes. However, these systems often rely on hardwired connections that limit the flexibility and scalability of the IT infrastructure. These systems lack an efficient method for addressing and configuring the connected devices, which leads to increased effort in commissioning and maintenance. The integration of new components into existing systems often requires extensive manual interventions and adaptations, which increases operating costs and extends downtime.Despite the considerable advances in the direct liquid cooling (DLC) art, there remains a need for improved systems that provide greater flexibility, scalability, and user-friendliness. In particular, there is a need for systems that allow simplified addressing and configuration of the connected devices in order to minimize installation and maintenance effort.It is therefore the object of the present invention to provide an arrangement for the direct liquid cooling (DLC) of an IT infrastructure, which arrangement allows the simplest possible replacement and the simplest possible addition of devices of a DLC, preferably without the DLC being taken out of service.According to a particular feature of the invention, the arrangement for direct liquid cooling (DLC) of an IT infrastructure comprises at least one IT rack with a plurality of inserts for insertion devices of a direct liquid cooling (DLC) and / or an IT infrastructure. An IT rack is a standardized housing which serves for accommodating and organizing IT components. Slot devices are modular units that can be inserted into the slots of the IT rack and belong either to direct liquid cooling (DLC) or to general IT infrastructure. The inserts of the IT rack are intended to be configured to receive insertion devices of the DLC. The DLC can be modular, wherein a module of the DLC corresponds to a plug-in device of the DLC.The arrangement comprises a bus system having a control device which has a bus having a plurality of data interfaces for the connection of plug-in devices of a direct liquid cooling system (DLC). A bus system is a communication structure that allows various components to exchange data with each other. The control device is a central unit which performs the control and monitoring of the bus system. The bus is the physical connection over which the data is transmitted, and the data interfaces are the points at which the plug-in devices can be connected, preferably without tools.An essential feature of the bus system is self-addressing for plug-in devices of direct liquid cooling (DLC) that can be connected to the bus. Self-addressing means that the plug-in devices automatically receive a unique address in the bus system as soon as they are connected, without a manual configuration being required. An advantage of this self-addressing is simplified installation and maintenance of the IT infrastructure, since the effort for manual addressing and configuration of the plug-in devices is dispensed with. Another advantage is increased flexibility and scalability of the system, since new plug-in devices can be added without problems, in particular during operation of the DLC.According to one embodiment of the invention, the inserts are arranged one above the other in the height direction of the IT rack, wherein the bus, preferably a CAN bus, has a bus line extending along the height direction with a plurality of plug connectors as data interface. The plug connectors are preferably designed for the tool-free connection of the plug-in devices to the bus line. Preferably, the plug connectors and corresponding complementary plug connectors of the plug-in devices are designed for the hot-swap connection. This arrangement allows efficient and structured cabling within the IT rack, thereby simplifying installation and maintenance of the slot machines. The use of a CAN bus as communication means offers several advantages, including a robust and reliable data transmission and a high level of interference security, which is of particular importance in the IT infrastructure. The CAN bus is known for its ability to communicate in real time while ensuring a high fault tolerance, which increases the overall reliability of the IT infrastructure. The bus line running along the height direction allows simple integration and expansion of the IT racks, since additional plug-in devices can be added without problems without requiring extensive changes to the cabling. The plurality of connectors as data interfaces ensures that each plug-in device can be individually addressed and controlled, which increases the flexibility and scalability of the entire arrangement. This configuration supports the self-addressing of the slot devices, thereby enabling automatic recognition and configuration of the devices upon connection to the bus. This reduces the manual outlay and the susceptibility to errors during the startup and maintenance of the IT infrastructure.According to one specific embodiment, the system for the direct liquid cooling of an IT infrastructure is designed in such a way that the bus system has the capability of self-addressing. This self-addressing allows the bus system to read out at least one unique identifier of an insert device connected to the bus or at least one assembly of the insert device. This means that any plug-in device or assembly which is connected to the bus and is basically designed for self-addressing can be automatically recognized and identified without the need for manual configuration. The unique identifier can be, for example, a serial number, a model code or another form of identification that uniquely describes the plug-in device or the assembly. This self-addressing and automatic identification capability provides several advantages. An advantage is the simplification of the installation process, since no manual input of addresses or identification numbers is necessary. This reduces the probability of errors and saves time in setting up the IT infrastructure. A further advantage is the improved management and monitoring of the IT infrastructure, since the control device has precise information about the connected plug-in devices and assemblies at all times. This allows more precise control of liquid cooling and more efficient use of resources. In addition, the system can respond more quickly to changes in configuration because new devices or assemblies are immediately recognized and integrated into the system. In addition, the automatic identification increases the security of the system, since only authorized and correctly identified devices gain access to the bus system. This may help prevent unauthorized access and protect the integrity of the IT infrastructure. Overall, the self-addressing and automatic identification capability contributes to a more robust, efficient, and secure IT infrastructure that is easier to manage and maintain.According to one specific embodiment, the bus system is configured to determine, on the basis of the read-out identifier, an addressing of the plug-in device having the unique identifier or of the at least one module of the plug-in device, which addressing is stored in a memory of the control unit and is identified with the read-out identifier. This means that preferably each plug-in device or module within the IT infrastructure has a unique identifier which can be read out by the bus system.This identifier is used to identify specific addressing in the memory of the control unit. The memory of the control unit contains a database or a table in which the addresses of the various plug-in devices or modules are stored. As soon as the identifier is read out, the control device can retrieve the corresponding addressing from the memory and assign it to the plug-in device or the module. This allows efficient and error free communication between the various components of the IT infrastructure. An advantage of this arrangement is the automatic and dynamic addressing of the plug-in devices, which considerably simplifies the installation and maintenance of the IT infrastructure. It is not necessary to configure or manage addresses manually, since the system automatically does so based on the unique identifiers. This reduces the probability of errors and minimizes the effort for the configuration and management of the IT infrastructure. Another advantage is the increased flexibility and scalability of the system. New plug-in devices or modules can be easily added, and the bus system will automatically recognize and address the new components. This allows simple expansion of the IT infrastructure without extensive manual interventions. Moreover, the automatic addressing can contribute to improving the efficiency of the cooling system, since the control of the liquid cooling can be matched precisely and in a targeted manner to the specific requirements of the individual plug-in devices or assemblies. This leads to an optimized cooling capacity and a more efficient energy consumption. Overall, this arrangement provides improved user-friendliness, flexibility, and efficiency for direct liquid cooling of IT infrastructures.According to one embodiment, the arrangement comprises at least one plug-in device of a direct liquid cooling system (DLC) with at least one module addressed via the bus system, wherein the module has at least one and preferably a plurality of components addressable independently of one another via the bus system. This allows for, for example, precise control and monitoring of the individual components within the assembly, resulting in improved efficiency and flexibility of the cooling solution. The bus system designed for the self-addressing of the plug-in devices allows each module and its components to automatically obtain a unique address as soon as they are connected to the system. This simplifies the installation and configuration of the IT infrastructure considerably, since no manual addressing is required. The possibility of responding to a plurality of components within an assembly independently of one another allows differentiated control and monitoring, which leads to an optimized cooling capacity. For example, the cooling performance of individual components may be adjusted as needed, resulting in better energy efficiency and longer lifetime of the IT hardware. Moreover, this arrangement enables improved debugging and maintenance, since specific components within an assembly can be addressed and diagnosed in a targeted manner. This reduces down times and increases the reliability of the entire system. A further advantage of this arrangement is scalability, since additional plug-in devices and assemblies can be integrated into the existing system without problems, without requiring extensive changes to the infrastructure. This makes the solution particularly attractive for growing IT environments requiring a flexible and conformable cooling solution. The use of a bus system with self-addressing and the possibility of having several independently addressable components within a module thus represents an advanced and efficient solution for the direct liquid cooling of IT infrastructures.According to one specific embodiment, the arrangement includes multiple components that are addressable independently of one another via the bus system and are preferably designed as identical parts and / or redundant to one another. This allows flexible and efficient management of the cooling components within the IT infrastructure. The ability to independently address each component provides precise control and monitoring of the cooling operations, resulting in optimized cooling performance. The self-addressing of the plug-in devices simplifies the installation and configuration of the components considerably, since no manual address allocation is required. This reduces the susceptibility to errors and the time required for setting up the IT infrastructure. The use of identical parts ensures that the components are interchangeable, which facilitates maintenance and replacement in the event of a failure. Redundant design of the components increases the reliability and availability of the system, since in the event of a failure of one component, another can take over immediately without interruptions occurring in operation. This is especially important in critical IT environments where downtime must be minimized. The integration of a bus system with self-addressing and the possibility of responding components independently contribute to the scalability of the IT infrastructure. New components can be added without difficulty without requiring extensive changes to the existing system. This allows flexible adaptation to growing requirements and future extensions of the IT infrastructure. A further advantage of this arrangement is the improved energy efficiency. The energy consumption can be optimized by the targeted control of the cooling components, which leads to a reduction in the operating costs. The redundant design of the components also contributes to increasing the operational reliability, since the system remains functional even in the event of failure of individual components. Overall, this arrangement provides a robust, flexible and efficient solution for the direct liquid cooling of IT infrastructures that both simplifies the installation and maintenance processes and increases operational safety and energy efficiency.According to one embodiment, the arrangement comprises a pump unit of a coolant distribution unit (CDU) or a reservoir and pumping unit (RPU) which has at least one and preferably a plurality of pumps for the liquid transport, wherein these pumps are designed as identical parts and / or redundant to one another. The identical parts of the pumps facilitate maintenance and replacement, since identical components can be used, which simplifies storage and reduces operating costs. The redundant design of the pumps increases the reliability of the system, since in the event of a pump failure one or more other pumps can still ensure the liquid transport. This is especially important in critical IT environments where continuous operation is essential. The pumping unit in the coolant distribution unit or the reservoir and pumping unit provides for the coolant to circulate efficiently through the system and remove the heat from the IT components. This helps maintain optimum operating temperatures and protects the hardware from overheating, increasing the life and reliability of the IT infrastructure. The integration of the pump unit into the coolant distribution unit or the reservoir and pump unit enables a compact and space-saving design which can be easily integrated into existing IT racks. The use of identical parts and redundant pumps also increases the flexibility of the system, since it can easily be adapted to different cooling requirements. The redundant design also offers the advantage of increased operating safety, since the system continues to remain functional in the event of a pump failure, which maximizes the availability of the IT infrastructure. Overall, this arrangement contributes to improved efficiency, reliability and flexibility of direct liquid cooling in IT infrastructures and ensures that the IT components are always optimally cooled.According to one specific embodiment, the bus system is set up in such a way that it is able to read operating data from at least one plug-in device of a direct liquid cooling system, at least one assembly of the direct liquid cooling system, or at least one component of the assembly. The control device is preferably configured in such a way that it can determine a maintenance state, a remaining service life or a wear state of the at least one plug-in device, of the at least one assembly or of the at least one component on the basis of these operating data. This configuration allows continuous monitoring and analysis of the operational data, resulting in improved maintenance planning and optimized life of the components. The ability to read out and analyze operational data allows potential problems to be recognized and solved early before they lead to failures or performance losses. This contributes to increasing the reliability and efficiency of the IT infrastructure. Another advantage of this arrangement is the reduction of unscheduled down times, since maintenance work can be performed based on the actual operating conditions and not at fixed intervals. This leads to better resource utilization and a longer lifetime of the components. In addition, the self-addressing of the bus system enables simple and rapid integration of new plug-in devices without a manual configuration being required. This saves time and reduces the susceptibility to errors during the installation and maintenance of the IT infrastructure. The combination of these features results in a robust and scalable solution for direct liquid cooling of IT infrastructures that improves both operating efficiency and serviceability.According to one embodiment, the arrangement comprises an IT rack which accommodates only direct liquid cooling (DLC) devices and does not contain any devices of an IT infrastructure. This means that the IT rack is specifically designed for receiving DLC plug-in devices without IT infrastructure components such as servers, memories or network devices being accommodated therein. This configuration provides several advantages. First, the efficiency of cooling is maximized because the entire IT rack is optimized for direct liquid cooling and there are no additional heat sources through IT infrastructure equipment. Secondly, maintenance and management of the refrigerators is simplified, since all components requiring direct liquid cooling are centralized and easily accessible. Third, this arrangement allows for better scalability and flexibility because the IT rack can be modular and easily extended by additional DLC slot devices if needed. Fourth, the absence of IT infrastructure equipment in the IT rack reduces the complexity of cabling and physical layout, resulting in cleaner and clearer installation. In addition, the bus system with self-addressing function can operate more efficiently, since it interacts exclusively with DLC plug-in devices and does not have to manage any additional data connections to IT infrastructure devices. This reduces the likelihood of communication errors and improves the reliability of the system. Another advantage is improved energy efficiency because direct liquid cooling typically consumes less energy than conventional air cooling systems, and concentration on DLC slot devices in the IT rack further increases this efficiency. Finally, this particular arrangement contributes to reducing operating costs, since the maintenance costs for a purely DLC system are usually lower than for a mixed system containing both DLC and IT infrastructure equipment. These advantages make the described arrangement particularly suitable for data centers and other IT environments that require high cooling performance and efficiency.According to an embodiment of the invention, the arrangement for the direct liquid cooling of an IT infrastructure comprises devices specifically designed for coolant distribution and storage, including plug-in devices of a coolant distribution unit or a reservoir and pump unit. These devices are integral components of the liquid cooling systems and play a decisive role in the efficient cooling of the IT infrastructure. The coolant distribution unit (CDU) serves to distribute the coolant to the various components of the IT infrastructure in a precise and controlled manner. This ensures uniform and effective cooling, thereby reducing the thermal load on the hardware components. The reservoir and pump unit (RPU), on the other hand, is responsible for the storage and circulation of the coolant. It ensures that a sufficient amount of coolant is always available and that this is pumped through the system at the necessary pressure. By integrating these specific devices into the assembly, the efficiency of liquid cooling is significantly increased. An advantage of this configuration is the improved thermal performance of the IT infrastructure, leading to higher reliability and longer lifetime of the hardware. Another advantage is the flexibility and scalability of the cooling system, since the plug-in devices can be easily added or removed in order to adapt the cooling requirement to the specific requirements of the IT infrastructure. This allows a custom cooling solution suitable for both small and large IT environments. In addition, self-addressing of the plug-in devices facilitates installation and maintenance of the system, since the devices are automatically recognized and configured as soon as they are connected to the bus system. This reduces the manual outlay and minimizes the susceptibility to errors in the setting up of the cooling system. Overall, the combination of coolant distribution unit and reservoir and pump unit in conjunction with the self-addressing of the plug-in devices offers a highly efficient and user-friendly solution for the direct liquid cooling of IT infrastructures.According to one embodiment, the arrangement comprises a housing in which at least one pump, preferably a plurality of redundant pumps, particularly preferably a plurality of pumps connected in parallel, are accommodated. This specific configuration of the arrangement provides significant advantages in terms of the reliability and efficiency of direct liquid cooling (DLC) of an IT infrastructure. The housing serves as a protection and integration structure for the pumps, thereby creating a compact and protected environment that increases the life and functionality of the pumps. The accommodation of at least one pump in the housing enables a continuous and stable coolant delivery, which is decisive for the maintenance of optimum operating temperatures of the IT infrastructure.The use of a plurality of redundant pumps increases operating reliability considerably, since in the event of a pump failure one or more replacement pumps can immediately spring in in order to maintain the cooling circuit. This is particularly advantageous in critical IT environments where failure of the cooling could lead to significant damage or data losses. The parallel connection of the pumps also offers the advantage of a uniform load distribution and increases the overall capacity of the cooling system. The parallel arrangement allows the pumps to operate together to deliver larger amounts of coolant, which increases the efficiency of the cooling system and allows better temperature regulation.The integration of the pumps into a common housing also facilitates maintenance and replacement of components. Technicians can quickly access the pumps if needed without having to disassemble the entire IT infrastructure, reducing maintenance times and increasing the availability of the systems. Moreover, the housing contributes to noise insulation by reducing the operating noise of the pumps, which is advantageous in noise-sensitive environments such as data centers.Overall, this embodiment provides a robust, efficient, and maintenance-friendly solution for direct liquid cooling of IT infrastructures that improves both the operational reliability and the performance of the cooled systems. The combination of a protective housing and a plurality of redundant, parallel-connected pumps ensures that the cooling functions reliably even under demanding conditions and the IT infrastructure is protected in an optimum manner.According to one embodiment, the arrangement comprises a plurality of devices, each of which has a housing and is preferably of identical design, these devices being accommodated in the IT rack. This configuration allows a standardized and modular structure within the IT rack, which significantly facilitates maintenance and replacement of the devices. The identical design of the devices ensures that each device has the same mechanical and electrical interfaces, which increases the compatibility and interoperability within the IT rack. The use of a housing for each device provides additional protection from physical damage and electromagnetic interference, which improves the reliability and longevity of the devices. Moreover, the standardized housing size allows efficient use of space within the IT rack, whereby more devices can be accommodated in a limited space. This arrangement also contributes to improved heat dissipation, since the housings are designed to allow optimum air or liquid circulation. The integration of a bus system with self-addressing for the plug-in devices of direct liquid cooling that can be connected to the bus ensures that each device automatically receives a unique address as soon as it is inserted into the IT rack. This simplifies the configuration and management of the devices considerably, since no manual addressing is required. Self-addressing also reduces the likelihood of address conflicts and facilitates system scalability as new devices can be added easily without changing existing configurations. The combination of standardized enclosures and an intelligent bus system improves the overall performance and efficiency of the IT infrastructure by simplifying installation, maintenance, and expansion of the devices while ensuring reliable and consistent cooling. The ability to accommodate a variety of identical devices in an IT rack provides flexibility and flexibility to accommodate the changing requirements of the IT infrastructure.According to one embodiment, the arrangement for direct liquid cooling (DLC) of an IT infrastructure comprises hot-swap-capable devices of direct liquid cooling, in particular the plug-in devices. This hot swap capability allows the slot devices to be replaced or replaced during operation without having to shut down the IT infrastructure. This is particularly advantageous for maintenance and replacement of components, as it maximizes operating time and minimizes down times. The hot swap capability preferably relates to the connection of the plug-in devices to a coolant circuit of the direct liquid cooling system and / or to a power supply, in particular to a DC power distribution system of the IT rack, preferably a DC busbar of the power distribution system. The connection to the coolant circuit enables continuous cooling of the IT infrastructure even if individual plug-in devices are exchanged. This helps maintain the optimum operating temperature and prevents overheating which could lead to hardware damage and data loss. The connection to a DC power distribution system, in particular to a DC busbar, ensures that the plug-in devices are supplied with the necessary energy at any time, which increases the reliability and stability of the IT infrastructure. The use of a DC bus bar also offers the advantage of simplified wiring and more efficient energy distribution, leading to a reduction in energy loss and an improvement in energy efficiency. Overall, the hot swap capability allows flexible and efficient management of the IT infrastructure by allowing seamless integration and maintenance of the cooling and power supply components. This leads to higher availability and reliability of the IT systems, which is of decisive importance in environments with high demands on operating time and performance.According to one embodiment, the arrangement comprises an uninterrupted power supply (UPS) and / or a battery backup unit (BBU), which are designed specifically to supply the direct liquid cooling devices (DLC) with a direct voltage in the event of a failure of the primary power supply, in particular of the direct liquid cooling power supply unit (DLC). This configuration ensures that the cooling of the IT infrastructure is continuously maintained even in the event of a power failure, which is of decisive importance for the avoidance of overheating and the protection of the sensitive IT components. The UPS and / or BBU are configured such that they can be integrated seamlessly into the existing bus system, which enables self-addressing for the plug-in devices of direct liquid cooling that can be connected to the bus. This means that the UPS and / or BBU are automatically recognized and incorporated into the system without the need for manual configuration. An advantage of this arrangement is the increased reliability and reliability of the IT infrastructure, since continuous cooling is ensured even in the event of power failures. A further advantage is the reduction of down times and potential damage to the IT infrastructure, since the devices for direct liquid cooling are supplied with the necessary direct voltage immediately by the UPS and / or BBU. This helps maintain the optimum operating temperature of the IT components and prevents thermal damage that could be caused by sudden temperature rises. The integration of the UPS and / or BBU into the bus system with self-addressing also simplifies the installation and maintenance of the entire cooling arrangement, since no additional configuration steps are required. This saves time and reduces the complexity of the system, which is advantageous in particular in large data centers in which a large number of devices and components have to be managed. Providing an uninterrupted power supply for direct liquid cooling increases the overall reliability of the IT infrastructure, which is of great significance for the continuous and reliable operation of data centers and other IT devices.According to one embodiment, the arrangement comprises an uninterrupted power supply (UPS) and / or a battery backup unit (BBU) which are designed to be hot-swap capable. This means that these components can be replaced during operation without having to interrupt the IT infrastructure or the direct liquid cooling (DLC). The hot swap capability relates in particular to the connection to a power connection and / or to a power distribution of the IT rack, wherein a DC busbar of the power distribution is preferably used. The hot swap capability provides the advantage that maintenance work or replacement of defective components can be performed without down time. This is especially important in IT environments where high availability and reliability are required. The use of a DC busbar ensures an efficient and stable current distribution, which further increases operational reliability. The integration of the UPS and / or BBU into the power distribution of the IT rack enables seamless and continuous power supply, even in the case of power failures or fluctuations in the power grid. This contributes to increasing the operational reliability and to avoiding data losses. The combination of hot swap capability with direct liquid cooling (DLC) ensures that the IT infrastructure is optimally cooled even at high power requirements without interruptions occurring. The self-addressing of the bus system enables simple and fast integration of new plug-in devices, which increases the flexibility and scalability of the IT infrastructure. Overall, the described arrangement provides a robust and flexible solution for the power supply and cooling of IT infrastructures, which improves both operational reliability and serviceability.According to one embodiment, the invention relates to an arrangement for direct liquid cooling (DLC) of an IT infrastructure, which comprises at least one IT rack with a plurality of inserts for insertion devices, which are provided for direct liquid cooling and / or the IT infrastructure. This arrangement contains a bus system with a control device which provides a bus with a plurality of data interfaces for the connection of plug-in devices of direct liquid cooling. A prominent feature of this arrangement is the self-addressing of the plug-in devices which can be connected to the bus, which enables automatic identification and integration of the devices into the system. In a specific embodiment, a plurality of the devices are configured as an uninterrupted power supply (UPS) and / or a battery backup unit (BBU). These devices are preferably redundant to one another and / or replaceable independently of one another, which means that they can be operated in parallel in order to increase the reliability of the system. The redundancy ensures that, in the event of a failure of one device, the other devices continue to maintain the power supply, as a result of which the operating time and reliability of the IT infrastructure are maximized. The independence of the devices allows one device to be replaced or maintained without interrupting the operation of the other devices or the entire system. This leads to a higher flexibility and serviceability of the IT infrastructure. The combination of direct liquid cooling and redundant, interchangeable power supply offers an efficient solution for cooling and power supply of IT systems, especially in data centers where high power density and continuous operation are critical. The self-addressing of the plug-in devices also facilitates the management and monitoring of the connected devices, since these are automatically recognized and integrated into the control system. This reduces the manual effort and the susceptibility to errors during the installation and configuration of the devices. Overall, this arrangement provides improved reliability, efficiency, and maintainability for IT infrastructures, particularly in demanding environments such as data centers.According to one embodiment, the arrangement comprises a control device which is integrated into one of the plug-in devices of direct liquid cooling or is designed as a plug-in device. This control device / plug-in device is designed to be hot-swap capable, which means that it can be replaced during operation without having to shut down the entire system. This hot swap capability relates in particular to the connection to the bus and / or the power supply, wherein a preferred embodiment comprises the connection to a DC power distribution of the IT rack, in particular to a DC bus bar of the power distribution. The term "hot-swap enabled" describes the ability to change components during ongoing operation, which significantly facilitates maintenance and replacement of parts and minimizes system downtime. The connection to the bus enables seamless communication and control of the plug-in devices, while the connection to the power supply ensures that the plug-in devices are continuously supplied with energy. The use of a DC power distribution, in particular a DC bus bar, provides the advantage of a more efficient and stable power supply, as DC systems typically have less energy losses and provide higher reliability. These features help to increase the operating efficiency and reliability of the IT infrastructure by ensuring continuous cooling and control of the slot devices. In addition, self-addressing of the slot devices allows for automatic configuration and integration into the system, further simplifying installation and operation. The combination of these features results in a robust and flexible solution for the direct liquid cooling of IT infrastructures that improves both performance and serviceability.According to one embodiment, the invention relates to an arrangement for direct liquid cooling of an IT infrastructure, which comprises a plurality of plug-in devices, wherein at least one of the plug-in devices is a power supply unit (PSU). This power supply unit is designed to be hot-swap capable, which means that it can be replaced during operation without the entire system having to be shut down. This is particularly advantageous for maintaining operating time and minimizing downtime in critical IT environments. The hot swap capability relates both to the connection to a power connection and to the connection to a DC power distribution of the IT rack, preferably a DC bus bar of the power distribution. This arrangement allows flexible and efficient management of power supply within the IT rack, as the PSU can be replaced quickly and easily if needed without interfering with the operation of the other components. The integration of a DC bus bar into the power distribution contributes to simplification of the wiring and to reduction of energy losses, leading to higher energy efficiency and improved overall system performance. In addition, the use of a DC bus facilitates system scalability because additional PSUs or other components can be added without difficulty. The combination of these features contributes to increased reliability and flexibility of the IT infrastructure, which is of great importance particularly in data centers and other environments with high availability and performance requirements. The ability to replace PSUs during ongoing operation without interrupting operation represents a significant advantage as this simplifies maintenance and replacement of components and maximizes operating time. In addition, direct liquid cooling enables efficient heat dissipation, leading to improved cooling performance and longer life of the components. The self-addressing of the plug-in devices in the bus system additionally contributes to simplifying installation and configuration, since the devices are automatically recognized and addressed, which reduces the management outlay and accelerates startup. Overall, this arrangement provides a robust and flexible solution for cooling and powering IT infrastructures that improves both efficiency and reliability.According to one embodiment, the arrangement comprises a power supply unit (PSU) having a plurality of redundant and independently replaceable power supplies. These power supplies are designed to be operated and maintained independently, which increases the reliability and maintainability of the entire IT infrastructure. The bus system is preferably configured in such a way that it can address the power supply units independently of one another. This means that each power supply unit receives its own unique address in the bus system, thereby enabling specific communication and control. This addressing capability of the bus system ensures that, in the event of a failure of one power supply unit, the other power supplies continue to remain in operation and maintain the power supply of the IT infrastructure. An advantage of this arrangement is the increased reliability, since the redundant power supplies can take over the power supply in the event of a defect in an individual power supply without interruptions occurring during operation of the IT infrastructure. A further advantage is the simplified maintenance and the replacement of the power supplies, since these can be addressed independently of one another and can therefore also be replaced independently of one another without the operation of the entire IT infrastructure being impaired. The possibility of self-addressing in the bus system additionally contributes to the flexibility and scalability of the arrangement, since new power supply units or other plug-in devices can be integrated into the existing system without problems, without a manual configuration being required. This reduces the management effort and the susceptibility to errors during the installation and maintenance of the IT infrastructure. The combination of redundant power supply units and an intelligent bus system, which enables independent addressing, thus represents a robust and efficient solution for the direct liquid cooling and power supply of IT infrastructures.According to one embodiment, the arrangement has a DC voltage supply for plug-in devices accommodated in the plugs, which preferably comprises a rectifier and a current distribution. This current distribution, preferably in the form of a busbar, runs along the rear side of the IT rack in the vertical direction and is supplied with a DC voltage by the rectifier. A plug-in device of a direct liquid cooling system is accommodated in one of the plugs and is electrically contacted with the power distribution. This enables efficient and reliable supply of the plug-in devices with DC voltage. The rectifier converts alternating current into direct current and provides it to the busbar which runs along the rear side of the IT rack. This provides the advantage of a centralized and consistent power supply that simplifies the installation and maintenance of the plug-in devices. The electrical contacting of the plug-in devices with the current distribution enables seamless integration and reliable operation of direct liquid cooling. By arranging along the rear side of the IT rack, the space requirement is additionally optimized and accessibility for maintenance work is improved. A further advantage is the reduction of cable lettuce and the minimization of potential sources of error due to loose or faulty connections. The use of a bus bar along the back side of the IT rack contributes to the structured and orderly arrangement of the components, which increases the efficiency and reliability of the overall IT infrastructure. The integration of the DC voltage supply into the arrangement also increases the energy efficiency, since DC current systems generally have less energy losses than AC current systems. The combination of these features results in a robust and efficient solution for direct liquid cooling of IT infrastructures that improves both operational safety and serviceability.According to one embodiment of the invention, the arrangement relates to a direct liquid cooling (DLC) of an IT infrastructure, which comprises at least one IT rack with a plurality of inserts for insert devices of the direct liquid cooling and / or an IT infrastructure. This arrangement contains a bus system with a control device, which has a bus with a plurality of data interfaces for the connection of plug-in devices of direct liquid cooling. The bus system is characterized by self-addressing for plug-in devices of direct liquid cooling that can be connected to the bus. In this specific embodiment, a plurality of first blind coupling plug connectors are arranged along the power distribution spaced apart from one another in the height direction for the tool-free connection of assemblies of direct liquid cooling and / or an IT infrastructure to the power distribution. These blind coupling plug connectors allow simple and quick installation and replacement of assemblies without the need for special tools. This leads to a significant reduction in the installation and maintenance times. The arrangement of the blind coupling connectors in the height direction along the current distribution ensures a uniform distribution of the electrical connections over the entire height of the IT rack, which enables a flexible and modular extension of the IT infrastructure. This is particularly advantageous in data centers where high density and scalability of the IT components is required. The tool-free connection also minimizes the risk of damage to the connections, which increases the reliability and service life of the entire IT infrastructure. The integration of these blind coupling connectors into the power distribution also contributes to improving the energy efficiency, since the electrical connections are optimized and losses are minimized. Overall, this embodiment provides improved user-friendliness, flexibility, and efficiency in installing and maintaining IT infrastructures that utilize direct liquid cooling.According to an embodiment of the invention, the arrangement relates to a direct liquid cooling (DLC) for an IT infrastructure, which has at least one coolant distribution channel running along the rear side of the IT rack in the height direction of the IT rack. Along this coolant distribution channel, a plurality of second blind coupling plug connectors are arranged spaced apart from one another in the height direction, which make possible a tool-free connection of assemblies of direct liquid cooling and / or an IT infrastructure to the coolant distribution channel. The coolant distribution channel serves as a central conduit for distributing coolant to the various assemblies within the IT rack, which ensures efficient and uniform cooling of the IT components. The second blind coupling connectors allow a quick and simple connection of the assemblies to the coolant distribution channel without the need for tools, which significantly facilitates maintenance and replacement of components. This leads to a reduction in the downtime and an increase in the operating efficiency of the IT infrastructure. The arrangement of the blind coupling connectors along the height direction of the coolant distribution channel ensures that the coolant supply is distributed uniformly and each assembly is optimally cooled independently of its position in the IT rack. This is particularly advantageous in data centers where uniform cooling of the IT components is critical to maintaining system performance and reliability. Moreover, the toolless connection allows flexible adaptation and expansion of the IT infrastructure, since assemblies can be added or removed quickly and easily. This is particularly useful in dynamic IT environments where frequent changes and adjustments are required. Overall, this arrangement provides improved cooling performance, simplified maintenance, and increased flexibility, resulting in an optimized operating environment for IT infrastructures.According to one embodiment, the arrangement has a linear guide for assemblies of direct liquid cooling and / or an IT infrastructure, wherein the linear guide extends parallel to a plug-in direction of the first and / or second blind coupling plug connectors. The linear guide enables a precise and low-friction movement of the inserts, which significantly facilitates the installation and maintenance of the inserts. The parallel alignment to the plug-in direction of the blind coupling plug connectors ensures that the plug-in devices can be inserted exactly and reliably into the intended positions, as a result of which a reliable connection of the coolant and data lines is ensured. This minimizes the risk of misconnections and leaks, which increases the operational reliability and efficiency of direct liquid cooling. The linear guide can also ensure a uniform distribution of the mechanical loads on the inserts, which supports the structural integrity of the IT infrastructure. The integration of the linear guide into the arrangement also improves the modularity and flexibility of the IT infrastructure, since plug-in devices can be replaced or added quickly and easily without requiring extensive adaptations or alignment work. This is particularly advantageous in data centers where fast scalability and adaptability to changing requirements are critical. The linear guide thus contributes to an optimized use of the available space and a more efficient cooling of the IT components, which ultimately increases the overall power and energy efficiency of the IT infrastructure.According to one embodiment, the arrangement for the direct liquid cooling (DLC) of an IT infrastructure comprises a plurality of plug-in devices which are accommodated in each case in one of the plug-in devices, wherein at least two of these plug-in devices are designed as redundant plug-in devices, preferably as redundant pump units (RPU). The redundant plug-in devices offer increased reliability and reliability for the cooling arrangement by ensuring that, in the event of a failure of one pump unit, another pump unit can automatically assume the cooling function. This is especially important in IT infrastructures where continuous operation and constant cooling are of critical importance to ensure the functionality and lifetime of the IT components. The redundant pump units are designed such that they can be integrated seamlessly into the existing bus system, which has self-addressing for the plug-in devices that can be connected to the bus. This allows simple and quick installation and replacement of the plug-in devices without the need for manual configuration or addressing. Self-addressing helps reduce the complexity of system integration and increase serviceability. Moreover, the redundant design of the pumping units allows for a uniform distribution of coolant delivery, resulting in more efficient and uniform cooling of the IT components. This can contribute to avoiding hotspots and to minimizing the thermal stress on the components. A further advantage of the redundant pump units is the possibility of carrying out maintenance work without having to interrupt the operation of the entire cooling arrangement. One pumping unit may be serviced or replaced while the other continues to maintain the cooling circuit. This results in higher availability and reliability of the entire system. The redundant pumping units may also be configured to operate alternately during normal operation to ensure even wear and longer life of the pumping units. Overall, the redundant plug-in devices, in particular the redundant pump units, contribute to a more robust and more efficient cooling arrangement which meets the requirements of modern IT infrastructures.According to one embodiment, the arrangement for the direct liquid cooling of an IT infrastructure is designed such that the rectifier, also known as a power supply unit (PSU), is designed as a plug-in device which is accommodated in one of the provided plugs. This specific configuration enables seamless integration of the rectifier into the existing structure of the IT rack, which increases the modularity and flexibility of the IT infrastructure. The rectifier, which is accommodated in a plug-in device, can easily be replaced or maintained without the entire arrangement having to be disassembled. This leads to a considerable reduction in down times and maintenance costs. In addition, the integration of the rectifier into the plug-in structure enables efficient use of the available space within the IT rack, as a result of which a more compact and space-saving arrangement is achieved. Another advantage of this configuration is improved heat dissipation since the rectifier is directly incorporated into the liquid cooling. This results in more efficient cooling and longer life of the electronic components. The use of a bus system with self-addressing for the plug-in devices connectable to the bus ensures that the rectifier and other components are automatically recognized and configured, which simplifies installation and operation. This self-addressing minimizes the need for manual settings and reduces the risk of errors in startup. The integration of the rectifier as a plug-in device also improves the scalability of the IT infrastructure, since additional rectifiers can be easily added if necessary in order to cover the energy requirement. This is particularly advantageous in data centers and other IT environments where power supply requirements are dynamic and often unpredictable. Overall, this arrangement provides improved efficiency, flexibility, and reliability for direct liquid cooling of IT infrastructures, making them an attractive solution for modern data centers and other demanding IT environments.According to one embodiment, the dependent claim describes an arrangement in which the at least one plug-in device of the direct liquid cooling (DLC) is a coolant distribution unit (CDU) or at least one assembly of a coolant distribution unit (CDU). This specific configuration extends the functionality of liquid cooling integrated into the IT infrastructure by enabling a precise and efficient distribution of the coolant within the system. A coolant distribution unit (CDU) is a central component in liquid cooling systems that provides for the coolant to be distributed to the various parts of the IT infrastructure in the proper amounts and at the required temperature. By integrating such a CDU or its modules into the arrangement, the efficiency of the cooling is significantly increased, since the coolant flows can be optimized and the thermal loads can be better distributed. This results in improved temperature control and a reduction of hotspots within the IT racks, which in turn increases the reliability and lifetime of the IT components.The use of a bus system with self-addressing for the plug-in devices of direct liquid cooling that can be connected to the bus enables seamless and automatic integration of the CDU into the overall system. This means that the CDU or its assemblies can be automatically recognized and incorporated into the control system without manual configuration or interventions. Self-addressing facilitates installation and maintenance of the coolant distribution unit as it eliminates the need for manual addressing and configuration. This saves time and reduces the risk of errors that could arise from manual interventions.A further advantage of this arrangement is the increased flexibility and scalability of the cooling system. Since the CDUs or their assemblies can be integrated into the IT racks as plug-in devices, it is possible to expand or adapt the cooling system as required without requiring extensive alterations or reconfigurations. This is particularly advantageous in data centers or other IT environments that change or grow quickly because it allows for quick and easy adjustment of cooling capacities.In summary, the integration of a coolant distribution unit or its assemblies as a plug-in device into the arrangement for direct liquid cooling provides considerable advantages with regard to efficiency, flexibility and serviceability. The automatic self-addressing of the bus system contributes, in addition to the user-friendliness and reliability of the overall system, in that it simplifies and accelerates the installation and integration of the coolant distribution unit.According to one embodiment, the arrangement for the direct liquid cooling of an IT infrastructure comprises a specific configuration in which at least one assembly of the coolant distribution unit, preferably a control device and / or an expansion vessel of the coolant distribution unit, is arranged outside a housing of the coolant distribution unit and inside or outside the IT rack. This arrangement allows for a flexible and modular design of the coolant distribution unit, which results in improved serviceability and accessibility. By placing the controller and / or the expansion vessel outside the housing of the coolant distribution unit, the physical space within the housing is optimized, thereby achieving more efficient use of the available space. This is particularly advantageous in densely packed IT racks where space is limited and efficient space usage is critical to the performance and maintenance of the IT infrastructure. Moreover, the external arrangement of these components allows simpler and faster maintenance, since technicians have direct access to the critical parts of the coolant distribution unit without having to open or disassemble the entire housing. This reduces down times and increases the operating time of the IT infrastructure. A further advantage of this configuration is improved heat dissipation, since the external components can be better ventilated and thus more efficient cooling is ensured. The possibility of placing the control device and / or the expansion vessel both inside and outside the IT rack offers additional flexibility in the design and adaptation of the IT infrastructure to specific requirements and spatial conditions. This flexibility is particularly useful in data centers that are frequently remodeled or augmented because the coolant distribution unit can be easily adapted to new configurations without requiring extensive remodelling. The integration of a bus system with self-addressing for the plug-in devices of a direct liquid cooling that can be connected to the bus also contributes to the efficiency and flexibility of the entire arrangement, since the plug-in devices can be automatically recognized and configured, which further reduces the installation and maintenance effort. Overall, this specific arrangement results in improved IT infrastructure efficiency, flexibility, and serviceability, which is of great importance in modern data centers. According to one embodiment, the arrangement comprises a coolant distribution unit (CDU), wherein said unit has at least one assembly which is a control device of the coolant distribution unit. This control device is electrically connected to the power distribution and is preferably designed as an insert device which is accommodated in one of the inserts. The specific communication mechanisms or means for interaction between the components of the arrangement comprise a bus system having a control device which has a bus having a plurality of data interfaces for the connection of plug-in devices of a direct liquid cooling system. The bus system enables self-addressing for the plug-in devices that can be connected to the bus. This self-addressing simplifies the installation and configuration of the plug-in devices considerably, since they are recognized and addressed automatically without the need for manual configuration. The controller of the coolant distribution unit, which is configured as a plug-in device, can be easily installed in one of the provided plugs, which increases the modularity and flexibility of the entire arrangement. The electrical connection to the power distribution ensures that the control device is supplied with energy continuously, which enables reliable control of the coolant distribution. This arrangement offers several advantages, including simplified installation and maintenance of the coolant distribution unit, since the control device as a plug-in device is easily accessible and replaceable. In addition, the electrical connection to the power distribution allows a central energy supply, which increases the efficiency and reliability of the coolant distribution. The integration of the control unit into the inserts of the arrangement contributes to saving space and enables a compact design of the entire IT infrastructure. Overall, this embodiment results in improved handling and management of the coolant distribution unit within the IT infrastructure, which contributes to optimized cooling performance and increased operating efficiency.According to one embodiment, the arrangement comprises a coolant distribution unit (CDU) which is an essential component for direct liquid cooling (DLC) of the IT infrastructure. This coolant distribution unit contains at least one assembly, which is referred to as expansion vessel. The expansion vessel is fluidically connected to a coolant distribution channel of the direct liquid cooling, which means that it is in direct connection with the cooling circuit and thus ensures a continuous and efficient distribution of the coolant. Particularly preferably, the expansion vessel is arranged outside the IT rack, which brings several advantages. First, this arrangement allows easier maintenance and inspection of the expansion vessel, since it is not accommodated within the confined space of the IT rack. Second, the external placement of the expansion vessel contributes to reducing thermal stress within the IT rack, as the expansion vessel itself can absorb and release a certain amount of heat. Third, the external arrangement facilitates the integration and replacement of the expansion vessel without substantially interfering with the operation of the IT infrastructure. The expansion vessel plays a decisive role in compensating for changes in volume of the coolant caused by temperature differences. This is especially important in order to keep the pressure in the cooling circuit stable and thus ensure the efficiency and reliability of the cooling. The direct fluidic connection to the coolant distribution channel ensures that the expansion vessel can react quickly and effectively to changes in the coolant volume. These features contribute overall to improved performance and reliability of direct liquid cooling, which in turn increases the operating time and efficiency of the IT infrastructure.According to one embodiment, the dependent patent claim describes an arrangement in which a plurality of assemblies of the coolant distribution unit (CDU) are accommodated as individual plug-in devices in a respective plug-in. This specific configuration allows for modular and flexible design of the coolant distribution within an IT rack. The coolant distribution unit (CDU) is a central component in direct liquid cooling (DLC) systems and serves to efficiently distribute and regulate the coolant. By dividing the CDU into a plurality of modules, which are accommodated as separate plug-in devices in the plugs of the IT rack, improved scalability and serviceability are achieved. Each assembly can be installed, maintained, or replaced independently without the need to shut down the entire cooling system. This leads to an increased operating time and reliability of the IT infrastructure. In addition, the modular construction allows simpler adaptation and expansion of the cooling system, since additional assemblies can be added in a simple manner as the cooling requirement increases. The integration of the modules as plug-in devices into the existing plugs of the IT rack ensures a space-saving and efficient use of the available space. In addition, the use of a bus system with self-addressing ensures that the new modules can be automatically recognized and integrated into the existing system, which further simplifies the installation and configuration. A further advantage of this arrangement is the possibility of concentrating the cooling power specifically on specific regions of the IT rack by the assemblies of the CDU being strategicly placed in the drawers. This leads to an optimized cooling capacity and a better temperature control within the IT rack. The features described contribute overall to improved efficiency, flexibility, and maintainability of direct liquid cooling in IT infrastructures.According to one embodiment, the arrangement comprises a coolant distribution unit (CDU) which contains assemblies designed as individual plug-in devices. These assemblies of the coolant distribution unit comprise at least two assemblies of the same or identical construction, preferably a plurality of pump units of the same or identical construction (RPU). Particularly preferably, at least two of these pump units of the same type or of identical construction are designed as redundant pump units. The incorporation of redundant pump units offers several advantages. First, redundancy increases system reliability because if one pumping unit fails, the other pumping unit can continue to maintain operation, minimizing down times and improving IT infrastructure reliability. Secondly, the use of pump units of identical construction allows simpler maintenance and exchangeability, since replacement parts and maintenance methods can be standardized. This reduces the complexity and cost of maintenance. Third, the load on the pumping units can be distributed evenly, which extends the life of the individual pumping units and increases the efficiency of the cooling system. The assemblies of the same type or of the same construction also facilitate the scalability of the system, since additional pump units can be integrated without problems in order to meet the cooling requirement with increasing IT load. By self-addressing the bus system, the pump units can be automatically recognized and integrated into the control system, which simplifies the installation and configuration. The combination of these features results in a robust, efficient and easily serviceable solution for direct liquid cooling in IT infrastructures.According to one embodiment, the arrangement for direct liquid cooling (DLC) of an IT infrastructure comprises a plug-in device which represents a subassembly of direct liquid cooling and has a housing in which at least two redundant, preferably parallel-connected pumps are arranged. These pumps are responsible for circulating the cooling liquid through the system and thus ensuring efficient heat dissipation from the IT components. The redundancy of the pumps offers a decisive advantage with regard to the reliability and reliability of the system. Should one of the pumps fail, the other pump may continue to maintain operation, thereby not interrupting cooling of the IT infrastructure. This is especially important in critical IT environments where failure of the cooling could lead to significant damage or data loss. The housing of the plug-in device is designed such that it does not contain compressors, expansion means or evaporators, and is preferably free of all the further active components of a refrigerating machine. This construction simplifies the design and maintenance of the cooling system because there are less complex and fragile components. Moreover, this reduces energy consumption and operating costs, since no additional active cooling elements have to be operated. Direct liquid cooling offers higher efficiency than conventional air cooling systems, since liquids have a higher heat capacity and can thus remove more heat per unit volume. This allows for a denser packing of the IT components and a better use of the available space in the IT rack. The integration of a bus system with a control device, which enables self-addressing for the plug-in devices connectable to the bus, simplifies the installation and operation of the cooling units. Self-addressing ensures that each slot device is automatically recognized and configured, further facilitating system set-up and maintenance. Overall, this arrangement offers an efficient, reliable and maintenance-friendly solution for cooling IT infrastructures, which meets the requirements of modern data centers.According to one embodiment, the arrangement for direct liquid cooling of an IT infrastructure comprises a housing in which a heat exchanger is integrated. This heat exchanger is designed to convey the cooling liquid through an inner circuit, using redundant pumps to circulate the cooling liquid efficiently. These redundant pumps provide increased reliability and reliability because they ensure that the coolant fluid circulates continuously even if one of the pumps fails. The heat exchanger can be designed as a liquid-liquid heat exchanger, which means that it transfers heat between two liquid circuits. An outer circuit of the liquid-liquid heat exchanger can be connected to a recooler, which cools the cooling liquid further before it is returned to the inner circuit of the heat exchanger. This configuration enables efficient heat dissipation from the IT infrastructure, as the cooling liquid is continuously cooled and reused. The use of a recooler in the outer circuit offers the advantage that the temperature of the cooling liquid is kept at an optimum level, which increases the efficiency of the cooling and extends the service life of the IT components. The combination of a heat exchanger, redundant pumps and a recooler ensures that the cooling liquid circulates effectively and reliably, which leads to stable and efficient cooling of the IT infrastructure. Another advantage of this arrangement is flexibility, since the outer circuit of the liquid-liquid heat exchanger can be connected to different types of recoolers if necessary to meet different cooling requirements. This flexibility allows the cooling power to be adapted to specific needs and thus to provide a customized solution for different IT infrastructures. The self-addressing of the bus system also facilitates the installation and operation of the plug-in devices, since these are automatically recognized and configured, which reduces the effort for the manual configuration and increases the operational reliability.According to one embodiment, the arrangement comprises a housing which has on its outer side at least a first lead and a first return for the connection of the inner circuit to a coolant distribution duct of direct liquid cooling, an electrical contact for the electrical connection to the power distribution and, if the heat exchanger is a liquid-liquid heat exchanger, preferably a second lead and a second return for the connection of the outer circuit to a recooler, wherein preferably all of the leads and returns and the electrical contact are designed as blind coupling plug connectors. The first flow and the first return flow allow the circulation of the coolant within the internal circuit of the direct liquid cooling, which ensures efficient heat dissipation from the IT components. The electrical contact ensures that the plug-in devices can be reliably supplied with current, which is indispensable for the continuous operation of the IT infrastructure. The second flow and the second return, which are used in a liquid-liquid heat exchanger, enable the connection of the outer circuit to a recooler, whereby the dissipated heat can be dissipated to the environment. The use of blind coupler connectors for all leads, returns and electrical contact offers several advantages. First, these connectors facilitate quick and secure connection and replacement of the plug-in devices because they produce an automatic connection without the need for manual interventions. This greatly reduces installation and maintenance times and minimizes the risk of errors or leaks. Secondly, blind coupling plug connectors ensure a reliable and tight connection which is decisive for the safe operation of direct liquid cooling and the avoidance of coolant losses. Third, they contribute to the modularity and flexibility of the IT infrastructure, since they allow for the easy exchange and expansion of the systems without requiring extensive redesigns. Overall, these features significantly improve the efficiency, reliability, and maintainability of direct liquid cooling in IT infrastructures.According to one specific embodiment, the arrangement describes an IT infrastructure, which is cooled by direct liquid cooling (DLC), and includes a bus system having a control unit, which enables self-addressing for plug-in devices that can be connected. The dependent claim extends this arrangement by defining that further slot devices are received or receivable in the slots of the IT racks, wherein these additional slot devices can be either servers or seamless power supplies (BBU). This extension entails specific communication mechanisms and means for interaction between the components of the IT infrastructure. The ability to integrate additional servers or BBUs into the inserts significantly increases the flexibility and scalability of the IT infrastructure. Servers provide computing power and storage resources while BBUs ensure continuous power even in the event of power failure. The integration of these devices into the existing bus system with self-addressing simplifies the management and monitoring of the entire IT infrastructure. Self-addressing allows the new slot devices to automatically identify themselves in the network and configure themselves, which reduces installation and maintenance effort. In addition, direct liquid cooling improves the thermal efficiency of the IT infrastructure by removing the heat directly from the critical components. This results in better cooling performance and higher energy efficiency compared to conventional air cooling systems. The combination of direct liquid cooling and the ability to accommodate additional servers and BBUs provides a robust and versatile solution for modern data centers that place high demands on performance and reliability. The integration of BBUs ensures that the IT infrastructure remains operational even in the event of power failures, which increases the reliability and availability of the services. Overall, this arrangement provides improved efficiency, flexibility, and reliability for IT infrastructures that rely on direct liquid cooling.According to one embodiment, the arrangement for the direct liquid cooling (DLC) of an IT infrastructure has at least one further plug-in device, which is preferably a coolant-carrying assembly of a coolant distribution unit of the direct liquid cooling, particularly preferably a heat exchanger or an expansion vessel. These additional plug-in devices are accommodated in one of the plugs without contact with the current distribution, preferably a busbar. The term "contactless" means that the plug-in device does not have a direct electrical connection to the current distribution, which minimizes the risk of short circuits and electrical faults. The coolant-carrying assembly, such as a heat exchanger, is a device that transfers heat from one medium to another without the media mixing. An expansion vessel, on the other hand, serves to compensate for volume fluctuations in the coolant circuit, which are caused by temperature changes. The integration of such devices into the arrangement enables a more efficient and more flexible coolant distribution within the IT infrastructure. An advantage of this arrangement is improved modularity and serviceability, since the plug-in devices can easily be replaced or maintained without impairing the overall power distribution. Moreover, the contactless inclusion contributes to the safety and reliability of the system by reducing potential electrical hazards. The use of a busbar as a current distribution offers the advantage of a uniform and stable power supply for the various plug-in devices. This is especially important in IT infrastructures, where constant and reliable power supply is essential for the operation of the devices. Overall, this arrangement provides improved efficiency and flexibility in direct liquid cooling of IT infrastructures by facilitating the integration and operation of additional coolant carrying assemblies while also increasing system safety and reliability.According to one embodiment, the arrangement relates to an IT infrastructure in which the inserts of the IT rack exclusively accommodate insert devices of direct liquid cooling. This specific configuration ensures that all components within the IT rack are optimized for direct liquid cooling. Direct liquid cooling (DLC) is a method in which liquid is directly applied to the components to be cooled in order to efficiently dissipate the heat that arises. The exclusive use of plug-in devices designed for direct liquid cooling creates a homogeneous cooling environment, which enables improved heat dissipation. This results in higher efficiency of cooling and can extend the life of the IT components since they are constantly operated in an optimum temperature range. A further advantage of this configuration is the simplification of the maintenance and the replacement of components, since all the plug-in devices operate on the same cooling principle and are thus compatible. This reduces the complexity and need for different cooling methods within a rack. The self-addressing of the bus system also enables automatic recognition and configuration of the connected plug-in devices, which further reduces the installation and maintenance effort. By integrating a bus system with a control device and a plurality of data interfaces, central control and monitoring of the cooling devices is made possible, which leads to improved control and optimization of the cooling capacity. The combination of these features provides a solution that improves both the efficiency and reliability of cooling in IT infrastructures.According to one embodiment, the arrangement for the direct liquid cooling of an IT infrastructure comprises at least one IT rack with a plurality of inserts for insertion devices which are provided for the direct liquid cooling and / or the IT infrastructure. This arrangement has a bus system with a control device which comprises a bus with a plurality of data interfaces for the connection of plug-in devices of direct liquid cooling. The bus system is designed in such a way that it enables self-addressing for the plug-in devices that can be connected to the bus. In this special embodiment, at least one of the plug-in devices can be a heat exchanger, preferably a liquid-liquid heat exchanger, an expansion vessel, a pump unit, a control device or a direct voltage supply. These specific slot devices perform different functions within the assembly and contribute to the efficiency and effectiveness of direct liquid cooling. The heat exchanger, in particular the liquid-liquid heat exchanger, enables the efficient transfer of heat between two liquid circuits, which increases the cooling capacity and lowers the operating temperatures of the IT infrastructure. The expansion vessel serves to compensate for volume variations in the refrigerant circuit, which improves the stability and reliability of the system. The pumping unit provides the necessary circulation of the coolant through the system, which ensures the continuous heat dissipation. The control device carries out the regulation and monitoring of the various components and processes within the arrangement, which enables precise control and adaptation of the cooling capacity. The DC power supply provides the necessary electrical energy for the various components of the arrangement, which ensures a stable and reliable power supply. The integration of these specific slot devices into the assembly offers several advantages, including improved cooling performance, increased system stability and reliability, and more efficient power supply and utilization. The self-addressing in the bus system also simplifies the installation and configuration of the plug-in devices, which increases the flexibility and scalability of the arrangement. This allows a fast and uncomplicated adaptation of the IT infrastructure to changing requirements and load conditions.According to one embodiment, the arrangement for the direct liquid cooling (DLC) of an IT infrastructure comprises at least two different plug-in devices, which are inserted into one of the plug-in devices in each case. This specific configuration enables a flexible and scalable cooling architecture within an IT rack. The different slot devices may perform various functions, such as cooling high performance processors, memory components, or other critical IT components. The use of a bus system having a control device which provides a bus having a plurality of data interfaces for the connection of the plug-in devices enables efficient communication and control of the cooling parameters. The self-addressing of the plug-in devices connectable to the bus ensures automatic and error-free identification and integration of the devices into the system, which considerably simplifies the installation and maintenance. An advantage of this arrangement is improved thermal management capacity, as direct liquid cooling provides more efficient heat dissipation compared to conventional air cooling systems. Another advantage is the reduction of hotspots within the IT rack, which leads to a higher reliability and service life of the IT components. The possibility of using different plug-in devices allows a customized adaptation of the cooling to the specific requirements of the respective IT infrastructure. This can lead to an optimization of the energy efficiency, since only the actually required cooling power is provided. Moreover, the modular construction contributes to flexibility and extensibility of the system, as additional plug-in devices can be easily added or replaced if needed. The integration of a bus system with self-addressing also facilitates the management and monitoring of the cooling parameters, since all relevant data can be detected and evaluated centrally. This allows proactive maintenance and early detection of potential issues, which increases operational reliability. Overall, this arrangement provides a highly adaptable and efficient solution for cooling IT infrastructures that addresses the increasing demands on performance and reliability.According to one embodiment, the arrangement relates to a direct liquid cooling system (DLC) for an IT infrastructure, which comprises a plurality of modules, wherein at least two of these modules are designed as different plug-in devices. This arrangement allows for improved cooling of IT components by using liquid as the cooling medium, which provides higher efficiency and better heat dissipation over conventional air cooling systems. The different appliances that function as assemblies may perform various functions within the cooling system, such as distributing the cooling liquid, monitoring the temperature, or controlling the flow of liquid. This modular construction allows flexible adaptation and expansion of the system, since different plug-in devices can be added or exchanged as required. The arrangement comprises a bus system having a control device which provides a bus having a plurality of data interfaces for the connection of the plug-in devices. The bus system has self-addressing that allows the slot devices to automatically identify and configure themselves as soon as they are connected to the bus. This greatly facilitates installation and maintenance of the cooling systems, as no manual addressing or configuration is required. Self-addressing also helps reduce errors that might arise from mis cabling or incorrect configurations. An advantage of this arrangement is the improved scalability, since additional plug-in devices can be integrated without problems without requiring extensive changes to the existing system. Another advantage is the increased reliability and efficiency of cooling, as direct liquid cooling allows for more uniform and effective heat dissipation. The use of different plug-in devices also allows specialized and optimized cooling for different components of the IT infrastructure, which leads to overall better performance and longer service life of the IT devices. The integration of self-addressing in the bus system ensures that the communication between the components proceeds smoothly and efficiently, which further improves the overall performance of the cooling system.According to one embodiment, the arrangement for the direct liquid cooling of an IT infrastructure comprises a multiplicity of specific plug-in devices which contribute to optimizing the cooling capacity and to monitoring the operating parameters. These plug-in devices comprise a pump unit for coolant, which is preferably equipped with redundant pumps in order to ensure high reliability and reliability. A heat exchanger is also included to efficiently provide heat transfer between the coolant and the ambient air. An expansion vessel serves to accommodate changes in the volume of the coolant due to temperature changes and thus stabilize the pressure in the system. Pressure and temperature sensors are integrated to continuously monitor operating conditions and ensure that the system operates within the optimum parameters. A three-way valve with a bypass valve makes it possible to control the coolant flow in a flexible manner, which facilitates adaptation to different cooling requirements. An AC power supply provides the necessary electrical energy for the various components, while a control unit takes over the monitoring and control of the entire arrangement. A service valve allows maintenance work and replacement of components without interrupting operation. A filter, preferably a filter fan, provides for removing contaminants from the coolant to increase the efficiency and life of the system. An automatic breather removes trapped air from the cooling circuit, which improves cooling performance and prevents cavitation in the pumps. Finally, a pressure relief valve is provided to limit the maximum pressure in the system and thus ensure the safety and integrity of the assembly. These specific communication mechanisms and means for interaction between the components enable efficient and reliable liquid cooling of the IT infrastructure. The novel features provide the advantage of improved monitoring and control of cooling performance, increased reliability by redundant pumps and flexible adaptation to different cooling requirements. Moreover, they contribute to safety and maintainability of the system by stabilizing operating conditions and facilitating maintenance.According to one embodiment, the invention relates to an arrangement for the direct liquid cooling (DLC) of an IT infrastructure, in which the plug-in devices are designed to be hot-swap capable, preferably with respect to a connection to a coolant circuit of the direct liquid cooling and / or a connection to a power supply. Hot swap enabled plug-in devices allow them to be replaced or added during ongoing operation of the IT infrastructure without the entire system having to be powered down. This is particularly advantageous in data centers or other IT environments where high availability and minimum downtime are critical. The ability to change drawers on-line reduces the need for scheduled service windows and minimizes service interruptions. The connection to the coolant circuit of direct liquid cooling ensures that the thermal efficiency and cooling performance is maintained even during the exchange or addition of devices. This is of particular importance because direct liquid cooling is an effective method of heat dissipation in high performance IT environments, thus increasing the reliability and life of the IT components. The connection to the power supply ensures that the new or exchanged plug-in devices are ready for operation immediately, which further increases the efficiency and flexibility of the IT infrastructure. Another advantage of the hot swap capability is improving the scalability of the IT infrastructure, as additional resources can be added quickly and without interrupting ongoing operation. This allows dynamic adaptation of the IT resources to changing requirements and contributes to optimization of the operating costs. The combination of these features results in a robust and flexible solution for the direct liquid cooling of IT infrastructures that significantly improves both serviceability and operational efficiency.According to one embodiment, an arrangement for the direct liquid cooling of an IT infrastructure is described, in which a pump unit of the direct liquid cooling is designed as one of the plug-in devices. This arrangement enables efficient and flexible cooling of IT components within an IT rack. The pump unit, which is designed as a plug-in device, can easily be integrated into the IT rack and exchanged or maintained if necessary. This offers the advantage of a modular construction which enables simple adaptation and expansion of the cooling capacity. The pump unit is directly connected to the bus system, which supports self-addressing for the connected plug-in devices. This self-addressing facilitates the configuration and management of the cooling components, since the pump unit automatically receives a unique address in the bus system as soon as it is connected. This reduces the manual outlay and the susceptibility to errors during the installation and startup of the cooling components. In addition, the direct integration of the pump unit into the bus system enables central control and monitoring of the cooling power. The control device of the bus system can receive and process data from the pump unit in order to optimize the cooling performance in real time. This leads to improved energy efficiency and a longer service life of the IT components, since the cooling can be adapted as required. A further advantage of the described arrangement is the reduction of the space requirement within the IT rack, since the pump unit as the plug-in device occupies less space than conventional external pump systems. This allows for a higher packing density of the IT components and a more efficient use of the available space in the data center. The integration of the pump unit into the IT rack also contributes to the reduction of the complexity of the cooling infrastructure, since fewer external connections and lines are required. This simplifies installation and maintenance of the cooling components and contributes to reduction of the overall cost. Overall, the described arrangement offers a flexible, efficient and cost-effective solution for the direct liquid cooling of IT infrastructures, which meets the requirements of modern data centers.According to one embodiment, the arrangement comprises a pump unit which forms a plurality of plug-in devices, wherein the plug-in devices formed by the pump unit are preferably identical parts. This specific configuration allows standardized and simplified integration of the cooling components into the IT infrastructure. The use of identical parts for the plug-in devices leads to a reduction in the complexity in the production and maintenance of the arrangement, since identical components can be used. This facilitates not only the production, but also the storage and replacement of spare parts. The pump unit, which functions as a central component, enables efficient distribution of the cooling liquid to the individual plug-in devices, thereby ensuring uniform and effective cooling of the IT infrastructure. The integration of the pump unit into the plug-in devices also reduces the space requirement and simplifies the installation, since fewer separate components are required. A further advantage of this arrangement is the improved scalability, since additional plug-in devices can be added without problems without requiring extensive changes to the existing infrastructure. The self-addressing of the bus system enables automatic recognition and configuration of the connected plug-in devices, which further reduces the installation outlay and increases the flexibility. The use of a bus system with data interfaces ensures efficient communication between the components, which enables monitoring and control of the cooling power in real time. This contributes to optimization of the operating efficiency and to avoidance of overheating, which increases the reliability and lifetime of the IT infrastructure. The combination of these features leads to a robust, flexible and maintenance-friendly solution for the direct liquid cooling of IT infrastructures, which can be used both in small and in large data centers.According to one embodiment, the arrangement comprises a plurality of plug-in devices which function as pump units (RPUs) and are designed as identical parts. These identical parts are preferably designed redundantly with regard to their pumping capacity for a direct liquid cooling medium (DLC) and can preferably be connected in series. The identical parts of the pump units offer the advantage of increased reliability and reliability of the cooling system, since the redundancy ensures that the failure of an individual pump unit does not lead to the complete failure of the cooling system. The possibility of connecting the pump units in series makes it possible to flexibly adapt the cooling power to the specific requirements of the IT infrastructure. The series connection can increase the delivery capacity of the coolant, which leads to more efficient heat dissipation and thus to improved cooling capacity. This arrangement helps maintain the operating temperatures of the IT infrastructure at an optimal level, which increases the life and performance of the IT components. A further advantage of the use of identical parts lies in the simplification of maintenance and replacement, since identical pump units are used, which can easily be replaced or maintained without different replacement parts having to be stored. This reduces the complexity of the system and the costs for replacement parts and maintenance. The self-addressing of the bus system enables simple and automatic integration of the pump units into the overall system, as a result of which the installation outlay is minimized and rapid startup of the cooling system is ensured. The data interfaces of the bus system enable continuous monitoring and control of the pump units, which enables precise regulation of the cooling capacity and a rapid reaction to changes in the cooling requirement. This contributes to optimization of energy efficiency and reduction of running cost. Overall, the arrangement provides a robust, flexible, and efficient solution for direct liquid cooling of IT infrastructures that improves both the reliability and performance of the cooled IT components.According to one embodiment, the invention relates to an arrangement for direct liquid cooling (DLC) of an IT infrastructure, which comprises a plurality of plug-in devices in an IT rack. These plug-in devices are capable of forming a pumping unit (RPU) which is responsible for cooling the IT infrastructure. A central element of this arrangement is the bus system with a control device which enables self-addressing for the connected plug-in devices. The specific communication mechanisms between the components of the assembly are designed to provide efficient and reliable interaction. The plug-in devices of the pump unit are configured such that they can continue to provide the required pump power in the event of a failure of one of the devices. This means that the remaining functioning plug-in devices are able to compensate for the cooling power that is lost due to the failure of a device. This redundancy in the pump unit ensures that the cooling of the IT infrastructure is maintained even in the event of a partial failure, which increases the reliability and availability of the entire IT infrastructure. Self-addressing in the bus system enables automatic recognition and configuration of the connected plug-in devices, which simplifies the installation and maintenance of the arrangement and minimizes down times. These features achieve high flexibility and scalability of the cooling arrangement, since new plug-in devices can be easily added or replaced without the need for manual reconfiguration. The ability of the pump unit to continue to supply the required pump power in the event of a failure of a plug-in device offers a considerable advantage with regard to operational safety and continuous cooling of the IT infrastructure. These redundancy mechanisms are particularly important in critical IT environments where seamless cooling is critical to smooth operation and avoid overheating damage. Overall, the described arrangement contributes to improving the operating efficiency, reliability and serviceability of IT infrastructures that rely on direct liquid cooling.According to one embodiment, the invention relates to an arrangement for the direct liquid cooling of an IT infrastructure, which comprises an IT rack with a plurality of inserts for insert devices of direct liquid cooling and / or an IT infrastructure. This arrangement contains a bus system with a control device, which has a bus with several data interfaces for the connection of plug-in devices of direct liquid cooling. The bus system enables self-addressing for the plug-in devices of direct liquid cooling that can be connected to the bus. In this specific embodiment, at least a first of the direct liquid cooling drawers is a coolant distribution unit (CDU) and the second is a coolant distribution unit (CDU) assembly, with the first drawer being free of the assembly. This means that the coolant distribution unit functions as a stand-alone module which operates independently of the assembly. The coolant distribution unit (CDU) is responsible for distributing the coolant within the IT rack to ensure efficient heat dissipation from the electronic components. The coolant distribution unit assembly may provide additional functions or extensions that improve the performance or flexibility of the cooling system. The separation of the coolant distribution unit from the assembly provides a modular structure that facilitates easier maintenance and scalability. This allows individual components to be replaced or expanded as needed without compromising the overall cooling system. An advantage of this arrangement is the increased flexibility and flexibility of the cooling system, as various configurations and extensions can be easily implemented. Another advantage is the improvement of serviceability, since defective or legacy components can be easily replaced without interrupting the operation of the entire system. In addition, the modular construction contributes to reducing down times, since maintenance work can be carried out more quickly and efficiently. The self-addressing of the bus system facilitates the integration of new plug-in devices, since these are automatically recognized and configured, which simplifies the installation and startup of new components. Overall, this arrangement provides a robust and flexible solution for direct liquid cooling in IT infrastructures that improves both efficiency and serviceability.According to one embodiment of the invention, the arrangement relates to a direct liquid cooling (DLC) of an IT infrastructure, wherein the arrangement has at least one IT rack with a plurality of inserts for insertion devices of a direct liquid cooling and / or an IT infrastructure. The arrangement comprises a bus system with a control device, which has a bus with a plurality of data interfaces for the connection of plug-in devices of a direct liquid cooling system. The bus system is characterized in that it has a self-addressing for plug-in devices of direct liquid cooling that can be connected to the bus. In a specific embodiment of this arrangement, it is provided that at least one assembly of the coolant distribution unit (CDU), preferably a control unit and / or an expansion vessel of the coolant distribution unit, is arranged outside a housing of the first plug-in device and inside or outside the IT rack. This means that the coolant distribution unit responsible for distributing and regulating the coolant within the system can be positioned flexibly in order to ensure optimum cooling performance and serviceability. The control device, which controls the functionality and monitoring of the coolant distribution unit, can thus be positioned outside the housing of the first plug-in device, which facilitates access and maintenance. Likewise, the expansion vessel, which serves to accommodate changes in volume of the coolant, can be placed flexibly inside or outside the IT rack in order to optimize the space requirement and the efficiency of the coolant distribution. This arrangement enables improved modularity and scalability of the IT infrastructure, since the components of the coolant distribution unit can be arranged independently of the position of the plug-in devices. An advantage of this configuration is increased flexibility in installation and maintenance of the coolant distribution unit, as the components are easily accessible and replaceable without compromising the overall IT infrastructure. A further advantage is the possibility of adapting the cooling power to specific requirements of the IT infrastructure by optimizing the positioning of the coolant distribution unit. This results in more efficient cooling and longer lifetime of the IT components.According to one embodiment, the dependent claim describes an arrangement in which at least one assembly is arranged within the IT rack, this assembly being one of the at least two insertion devices inserted into at least one of the insertion devices. This arrangement allows a flexible and modular structure within the IT rack by facilitating the integration of various shelf assemblies in the form of slot machines. The assemblies may be, for example, cooling modules, computing units, or other IT components specifically configured for direct liquid cooling (DLC). By using a bus system with a control device which enables self-addressing for the connected plug-in devices, the communication and control within the IT rack is optimized. Self-addressing allows the slot devices to automatically identify themselves in the network and configure themselves, which simplifies installation and maintenance and reduces down time. An advantage of this arrangement is the increased flexibility and scalability of the IT infrastructure, since new modules can be easily added or replaced without requiring extensive manual configuration work. A further advantage is the improved efficiency of the cooling, since the direct liquid cooling enables effective heat dissipation and thus increases the operational reliability and performance of the IT components. The modular construction also contributes to reducing space requirements and cabling complexity, which is of importance in particular in data centers where space and energy efficiency are critical factors. The integration of the assemblies in the form of plug-in devices also improves serviceability, since defective or legacy modules can be easily replaced without adversely affecting the operation of the entire IT rack. Overall, this arrangement provides a robust and future-safe solution for the cooling and management of IT infrastructures that addresses the increasing demands on power and efficiency.According to one embodiment, the arrangement comprises an assembly which serves as an expansion vessel and is fluidically connected to a coolant distribution duct for direct liquid cooling. The expansion vessel is preferably connected directly to the coolant distribution channel, which means that there are no additional connectors or intermediate components that could impede the flow of the coolant. This allows for a more efficient and faster response to changes in volume of the coolant caused by temperature changes. Particularly preferably, the expansion vessel is arranged outside the IT rack. This placement outside the IT rack offers several advantages: First, the valuable space inside the rack is kept free for other critical components of the IT infrastructure. Second, the external placement of the expansion vessel facilitates maintenance work because it is more easily accessible without requiring removal or translation of other components in the rack. Third, the external arrangement contributes to safety, since in the event of a leak or other problem with the expansion vessel, the sensitive IT hardware in the rack is better protected. The expansion vessel itself serves to compensate for volume fluctuations in the coolant circuit which arise as a result of thermal expansion or contraction of the coolant. This is especially important in direct liquid cooling systems, since such systems often operate with high coolant quantities and large temperature differences. The integration of an expansion vessel stabilizes the pressure in the coolant circuit, which extends the service life of the entire cooling system and increases the operational reliability. In addition, the expansion vessel can serve as a collecting point for any air bubbles which may occur in the coolant circuit, as a result of which the efficiency of the cooling is further increased. The fluidic connection of the expansion vessel to the coolant distribution channel ensures that the coolant can circulate continuously and without interruption, which is decisive for maintaining a constant operating temperature of the IT infrastructure. Overall, this arrangement contributes to optimizing the cooling performance and reducing downtime, which is of great importance in highly available IT environments.According to one embodiment, the arrangement for direct liquid cooling (DLC) of an IT infrastructure comprises at least two modules of the same or identical construction of direct liquid cooling, preferably a plurality of pump units of the same or identical construction (RPU), of which at least two are particularly preferably designed as redundant pump units. This arrangement enables improved reliability and reliability of the cooling infrastructure by ensuring that in the event of a failure of one pumping unit one or more redundant pumping units can automatically take over. The pump units of the same type or of identical construction are designed such that they can be integrated seamlessly into the bus system, which has self-addressing for the plug-in devices of direct liquid cooling that can be connected to the bus. Self-addressing facilitates installation and replacement of the pumping units, as no manual configuration is required. This leads to a reduction in installation and maintenance time and minimizes the risk of configuration errors. Moreover, the use of pump units of the same or identical construction simplifies storage, since only one type of replacement parts has to be kept in stock. The redundant design of the pump units contributes to increasing the system availability, since cooling is still ensured even in the event of a failure of a pump unit. This is especially important for IT infrastructures that require continuous cooling to maintain their operability. The integration of the pump units into the bus system also enables central monitoring and control of the cooling infrastructure, which leads to more efficient management and a better overview of the operating state of the individual components. The possibility of using a plurality of pump units of the same or identical construction also offers scalability of the cooling performance, since additional pump units can be added in a simple manner as the cooling requirement increases. This makes the arrangement flexible and adaptable to different requirements and load conditions. Overall, the described arrangement offers a robust, efficient and easy-to-manage solution for the direct liquid cooling of IT infrastructures, which ensures high reliability and simple handling by means of its redundant and self-addressing components.According to one embodiment of the invention, the arrangement comprises an IT rack with a plurality of inserts for insertion devices which are provided for direct liquid cooling (DLC). A specific feature of this embodiment is that at least one of the plug-in devices has a housing in which at least two redundant, preferably parallel-connected pumps are arranged. These pumps are responsible for the circulation of the cooling liquid and ensure continuous cooling of the IT infrastructure. The redundancy of the pumps offers a considerable advantage with respect to the reliability and reliability of the cooling system. Should one pump fail, the other pump may continue to circulate the cooling liquid, thereby maximizing the operating time and stability of the IT infrastructure. Another important feature of this embodiment is that the housing is free of a compressor, an expansion means and a condenser and preferably also contains no further active components of a refrigerating machine. This significantly reduces the complexity and maintenance of the system, as there are fewer components that potentially fail or need maintenance. The absence of these additional active components also contributes to energy efficiency because energy consumption remains confined to the pumps and no additional energy sources are required for the operation of compressors or other refrigeration machine components. The parallel connection of the pumps also allows a uniform distribution of the workload, which extends the service life of the pumps and increases the efficiency of the cooling system. Overall, this embodiment provides a robust and efficient solution for direct liquid cooling of IT infrastructures that improves both operational safety and serviceability.According to one embodiment, the arrangement for direct liquid cooling of an IT infrastructure comprises a housing in which at least one heat exchanger is integrated. This heat exchanger serves for the efficient dissipation of heat generated by the IT components. The arrangement is designed such that cooling liquid is conveyed through an inner circuit of the heat exchanger, wherein redundant pumps continuously circulate the cooling liquid. These redundant pumps ensure a high reliability and reliability of the cooling system, since in the event of a failure of one pump, the other can continue to maintain the cooling circuit. A liquid-liquid heat exchanger is particularly advantageous since it enables the heat transfer between two liquid circuits. The outer circuit of this heat exchanger can be connected to a recooler, which brings the heated cooling liquid back to a lower temperature before it is fed again into the inner circuit of the heat exchanger. This configuration enables efficient and continuous cooling of the IT components, which improves the performance and lifetime of the IT infrastructure. An advantage of this arrangement is improved thermal efficiency, as direct liquid cooling provides a higher heat transfer capacity than conventional air-based cooling systems. Moreover, the integration of a liquid-to-liquid heat exchanger reduces the need for large and loud fans, resulting in a quiet and more energy efficient operating environment. The ability to connect the heat exchanger outer circuit to a recooler provides flexibility in the selection of cooling methods and allows adaptation to different ambient conditions and cooling requirements. These features help reduce overall operating costs and minimize environmental impact by reducing energy consumption and maximizing cooling efficiency. The described communication mechanisms and means for interaction between the components of the arrangement ensure seamless integration and control of the cooling processes, which simplifies the management and maintenance of the IT infrastructure.According to one embodiment, the arrangement comprises a control device as one of the plug-in devices, which can contain the control device and is inserted into one of the plug-in devices. This control device is configured such that it can actuate at least one further plug-in device of the direct liquid cooling which is inserted into another plug-in device. This means that the control device represents the central control unit within the IT rack and performs the coordination and control of the liquid cooling. The advantage of this arrangement is the improved modularity and flexibility of the IT infrastructure, since the control device can be placed in any slot and takes over the control of the cooling processes. The integration of the control unit into the control unit reduces the complexity of the cabling and installation, which leads to simpler maintenance and a more rapid exchange of components. In addition, the arrangement enables efficient and targeted cooling, since the control device can monitor the cooling requirements of the individual plug-in devices and control them accordingly. This results in optimized energy efficiency and improved thermal performance of the IT infrastructure. A further advantage is the scalability of the solution, since additional control units and plug-in units can be added without problems without requiring extensive changes to the existing infrastructure. The self-addressing of the bus system also facilitates the integration of new plug-in devices, since these are automatically recognized and incorporated into the control system. This reduces the manual configuration effort and minimizes the susceptibility to errors when installing new components. Overall, the described arrangement offers a highly flexible, efficient and maintenance-friendly solution for the direct liquid cooling of IT infrastructures, which can be adapted to the specific requirements and circumstances of the respective environment.According to one embodiment, the dependent patent claim describes an arrangement in which a second plug-in device is connected to a control device for signal transmission via a bus, preferably a wired data bus. The second plug-in device preferably does not have its own control, in particular no control device. This configuration enables simplified and cost-effective integration of additional plug-in devices into the IT infrastructure, since these plug-in devices do not have to be equipped with their own controller. Instead, the control and monitoring take place centrally via the control device which communicates with the plug-in devices via the bus. This reduces the complexity of the individual plug-in devices and reduces production costs since fewer electronic components are required. In addition, the central control system enables uniform and coordinated control of the liquid cooling, which increases the efficiency and reliability of the cooling system. The wired data bus ensures a stable and reliable communication connection between the control device and the plug-in devices, as a result of which a fast and precise transmission of control and monitoring data is ensured. This is particularly advantageous in environments where high availability and performance of the IT infrastructure is required. The self-addressing of the bus system also facilitates the installation and replacement of plug-in devices, since these are automatically recognized and integrated into the system without a manual configuration being required. This saves time and minimizes the risk of installation errors. Overall, this arrangement contributes to a flexible, scalable and maintenance-friendly IT infrastructure which meets the requirements of modern data centers.According to one embodiment, the direct liquid cooling (DLC) arrangement of an IT infrastructure comprises at least one IT rack with a plurality of inserts for insert devices of the direct liquid cooling and / or an IT infrastructure. This arrangement contains a bus system with a control device, which has a bus with several data interfaces for the connection of plug-in devices of direct liquid cooling. The bus system enables self-addressing for the plug-in devices of direct liquid cooling that can be connected to the bus. The at least one second plug-in device of direct liquid cooling can be selected from various components, including a coolant distribution unit (CDU), a reservoir and pump unit (RPU), preferably with 2N redundant pumps, a heat exchanger, an expansion vessel, a pressure and / or temperature sensor, a three-way valve with bypass valve, an AC power supply, a further control device, a service valve, a filter, preferably a filter fan, an automatic breather and a pressure limiting valve. These specific components and communication mechanisms allow for improved interaction and control between the various parts of the chiller. The coolant distribution unit (CDU) provides efficient distribution of coolant to the various parts of the IT infrastructure, while the redundant pump reservoir and pump unit (RPU) provides reliable and continuous coolant supply. The heat exchanger allows effective heat transfer to regulate the temperature of the IT components. The expansion vessel compensates for changes in volume of the coolant caused by temperature changes. Pressure and temperature sensors continuously monitor operating conditions to ensure optimal performance and safety. The bypass valve type three-way valve enables flexible control of the refrigerant flow while the AC power supply ensures stable power supply. A further control device can be used for additional monitoring and control. The service valve facilitates maintenance work, and the filter, preferably a filter fan, provides for the purity of the coolant. An automatic breather removes air bubbles from the system and the pressure relief valve protects the system from excessive pressure. These new features provide improved reliability, efficiency, and maintainability of direct liquid cooling of an IT infrastructure.According to one embodiment, the arrangement for direct liquid cooling of an IT infrastructure comprises a bus which can be connected to the control device via a multipolar blind coupling plug connector. This blind coupling plug connector is preferably divided into male and female parts, which are particularly preferably guided relative to one another via a self-centering. The multi-pole blind coupling connector provides a reliable and efficient method of connecting the bus to the controller, thereby greatly simplifying installation and maintenance of the IT infrastructure. Self-centering of the male and female parts of the connector ensures a precise and secure connection that minimizes the risk of misconnections or damage to the contacts. This is particularly advantageous in environments where frequent connections and disconnections are required, as it facilitates handling and increases the reliability of the connection. Moreover, the multipolar structure of the blind coupling connector allows the transmission of several signals and / or power supplies over a single connection, which reduces the complexity of the wiring and improves the clarity in the IT rack. These features help to increase the efficiency and reliability of direct liquid cooling by enabling seamless integration of the cooling components into the IT infrastructure. A further advantage of using a blind coupling plug connector with self-centering is the reduction of the installation time and the reduction of the training effort for the personnel, since the connection is designed to be intuitive and error-resistant. This results in an overall higher operating efficiency and lower operating costs. The combination of these features ensures that the arrangement is not only technically advanced, but also practical and user friendly, making it an attractive solution for modern IT infrastructures relying on direct liquid cooling.According to one embodiment, the arrangement for the direct liquid cooling of an IT infrastructure is designed such that the blind coupling plug connector is arranged on an exposed housing side of the control unit, preferably on an end face of the housing, which, when the control unit is inserted into one of the inserts, faces a rear side of the housing or of the IT rack. This means that the blind coupling connector is strategic in order to allow a simple and efficient connection when the control device is inserted into the plug-in. On the rear side of the housing or of the IT rack there is a complementary blind coupling plug connector, which corresponds to the blind coupling plug connector of the control unit. These two blind coupling plug connectors form a plug connection as soon as the control device is completely inserted into the plug-in unit. This arrangement allows automatic and error-free connection of the control and communication lines without the need for manual interventions. The advantage of this configuration is the reduction of the installation time and the minimization of connection errors, since the blind coupling plug connectors ensure a secure and reliable connection. In addition, the positioning of the plug connectors on the rear side of the housing or of the IT rack minimizes the space requirement in the front region, which leads to better space utilization and accessibility of the IT infrastructure. The self-addressing of the bus system enables the plug-in devices connectable to the bus to automatically identify themselves and configure themselves, which further simplifies the startup and maintenance of the IT infrastructure. This contributes to higher efficiency and reliability of the entire system, since human errors in the addressing and configuration of the devices are avoided. The combination of these features results in improved overall performance and user-friendliness of the direct liquid cooling solution for IT infrastructures by enabling seamless integration and communication between the various components.According to one embodiment, the arrangement comprises a control device which has a drawer arrangement with a drawer body and a drawer, wherein the drawer body is accommodated in one of the drawers and the drawer can be pushed into the drawer body. At least one control device is accommodated in the drawer. This arrangement enables flexible and modular integration of the control unit into the IT infrastructure. The drawer body serves as a housing or holder which is accommodated in one of the provided inserts of the IT rack. The drawer, which can be inserted into the drawer body, offers a simple possibility of accommodating the control device and removing or replacing it as required. This facilitates maintenance work and upgrades, since the control device is accessible without great effort.An advantage of this arrangement is the improved accessibility of the control unit, which considerably simplifies the maintenance and the replacement of the control components. A further advantage is the increased flexibility in the configuration of the IT infrastructure, since the drawer with the control device can be placed in different drawers of the IT rack. This allows an adjustable and scalable solution that satisfies the specific requirements of the IT environment.The drawer arrangement also contributes to better organization and structuring of the IT infrastructure by ensuring proper and secure accommodation of the control unit. This may help extend the life of the components and increase the reliability of the overall system. Moreover, the drawer assembly may help to more efficiently use the space in the IT rack, as the controller is housed in a compact and easily accessible format.The integration of the control unit into a drawer within a drawer body also offers the advantage of improved cooling and ventilation of the control components. By placing the control unit in a drawer, the heat dissipation can be optimized, which can lead to better performance and a longer service life of the components. Overall, this arrangement provides a flexible, accessible, and efficient solution for the integration and management of controllers in a direct liquid cooling IT infrastructure.According to one embodiment, the assembly comprises a drawer body and a drawer both equipped with complementary multipolar blind coupling connectors. These blind coupling plug connectors enable a seamless and secure electrical connection between the components of the IT infrastructure, in particular between the drawer body and the drawer. The blind coupling plug connector of the drawer body is connected to the bus, while the blind coupling plug connector of the drawer is connected to the control device. This arrangement ensures that a reliable and stable connection is established as soon as the drawer is fully inserted into the drawer. An advantage of this configuration is the increase of operating reliability and the minimization of connection errors that could arise due to manual plug connections. The blind coupler connectors are designed to provide automatic and precise alignment of the contacts, which greatly simplifies installation and maintenance of the IT infrastructure. A further advantage of this arrangement is the reduction of down times, since the drawers can be replaced or maintained quickly and without great effort. This is especially important in environments where high availability and reliability of the IT infrastructure is required. Moreover, the use of multipolar connectors allows the transmission of different signals and power supplies over a single connection, reducing the complexity of the wiring and saving space. The blind coupling connectors are designed to ensure a reliable connection even under difficult conditions, such as in dirty or moist environments. This contributes to the longevity and robustness of the entire arrangement. Overall, this embodiment provides an efficient and user-friendly solution for the direct liquid cooling of an IT infrastructure by enabling a simple and secure connection of the individual components and at the same time increasing operational reliability and serviceability.According to one embodiment, the arrangement comprises a drawer arrangement which has at least one sensor on opposite end sides for determining a measurement variable relating to the environment of the drawer arrangement. These sensors are preferably of the same type and serve for determining the same physical measured variable. The inclusion of sensors on the front sides of the drawer assembly allows precise monitoring and control of environmental conditions within the IT infrastructure. These sensors can measure, for example, temperature, humidity or other relevant physical variables which are important for the operation and cooling of the IT infrastructure. Placement of the sensors on opposite faces ensures comprehensive coverage and sensing of environmental conditions, which contributes to more accurate and efficient control of direct liquid cooling. The sensors of the same type for determining the same physical measured variable enable redundant monitoring, which increases the reliability and safety of the system. Should one sensor fail or provide inaccurate values, the other sensor may continue to provide proper data, thereby ensuring continuity of monitoring and control. This arrangement helps optimize the operating conditions of the IT infrastructure by allowing constant and precise monitoring of the environmental parameters. This is especially important in environments where temperature and other physical quantities are critical to the performance and life of the IT components. The integration of these sensors into the bus system of the arrangement also enables seamless communication and data transmission between the sensors and the control device. This facilitates implementation of automated control mechanisms based on the captured data and contributes to the efficiency and reliability of the overall IT infrastructure. The use of sensors of the same type for determining the same physical measured variable also simplifies the maintenance and the replacement of the sensors, since no different sensor types need to be stored. Overall, this embodiment provides improved environmental condition monitoring and control, resulting in optimized performance and longer IT infrastructure life.According to one embodiment of the invention, the arrangement comprises sensors which are preferably positioned on the opposite end faces of the IT rack in order to enable a difference measurement. These sensors may perform either an air pressure difference measurement or an air temperature difference measurement. The differential measurement between the opposing faces of the IT rack provides precise monitoring of the environmental conditions within the rack and allows for accurate control of cooling. The placement of the sensors on the end faces ensures that the measurements are representative of the total air circulation and temperature distribution in the rack. This is particularly advantageous since it makes it possible to identify potential hotspots or regions with inadequate cooling at an early stage and to take corresponding measures. Differential air pressure measurement may help monitor the flow of air through the rack and ensure that cooling is uniform and efficient. An air temperature difference measurement, on the other hand, can help to detect temperature differences within the rack and adjust the cooling accordingly in order to avoid overheating of the IT components. Both types of differential measurement help to increase the operational reliability and efficiency of the IT infrastructure. The integration of these sensors into the bus system of the arrangement enables seamless communication with the control device, which processes the captured data and sends corresponding control commands to the cooling components. This leads to an automated and optimized control of the cooling power, which in turn reduces the energy consumption and extends the service life of the IT components. The self-addressing of the plug-in devices in the bus system ensures that the sensors and other components can be integrated into the system without manual configuration, which simplifies the installation and maintenance of the arrangement. Overall, this embodiment provides improved monitoring and control of cooling in IT racks, resulting in higher reliability and efficiency of the overall IT infrastructure.According to one embodiment, the arrangement comprises a control device which provides a power supply for at least one second plug-in device of direct liquid cooling or for a further electrical load of direct liquid cooling. This specific configuration allows for improved integration and management of power supply within the IT infrastructure, particularly in an IT rack with multiple slot trays for slot machines. The controller functions not only as a central control unit for communicating and controlling the connected devices, but also as a central power source, thereby eliminating the need for separate power supplies for each individual device. This leads to a reduction in the complexity and the space requirement within the IT rack. The power supply by the control device ensures a consistent and reliable power supply, which is advantageous in particular in environments with high demands on the operating time and reliability of IT systems. The integration of the power supply into the control device also simplifies the cabling, which facilitates the installation and maintenance of the IT infrastructure. Moreover, the controller may monitor and control the power supply, resulting in more efficient energy usage and improved operational safety. The ability to manage the power supply centrally also allows down times to be minimized and a quick response to power supply problems to be guaranteed. A further advantage of this arrangement is the flexibility in expanding the IT infrastructure, since additional plug-in devices or electrical loads can be integrated into the existing system without problems, without requiring extensive changes to the power supply. This is particularly useful in dynamic IT environments where frequent adaptations and extensions are needed. Overall, the provision of an integrated power supply by the controller contributes to an optimized and more efficient management of the IT infrastructure, both reducing operating costs and improving the reliability and performance of the entire IT environment.According to one embodiment, the invention relates to an arrangement for direct liquid cooling (DLC) of an IT infrastructure, which comprises a plurality of plug-in devices. This arrangement is characterized in that the control device has a memory or is communicatively connected to a memory which is formed independently of the control device and in which a configuration for controlling the plurality of plug-in devices is contained. This plurality of plug-in devices is connected via the bus to the control device for the data transmission and does not have its own control. The use of a central control unit with an associated memory which contains the configuration data for controlling the plug-in devices brings several advantages. First, the complexity of the individual plug-in devices is reduced, since these do not require their own control unit. This leads to a reduction in production costs and an increase in the reliability of the individual plug-in devices, since fewer components can fail. Secondly, the central storage of the configuration data allows simpler and more efficient management and updating of the control parameters. Changes to the configuration can be made centrally without each individual plug-in device having to be adapted separately. This saves time and reduces the effort for maintenance and updates. Third, the central controller improves the coordination and synchronization of the cooling processes because the controller has a comprehensive survey of the status and requirements of all connected slot devices. This leads to an optimized cooling capacity and a more efficient use of the cooling resources. The communication between the plug-in devices and the control device via the bus allows a fast and reliable data transmission, which is decisive for the real-time control of the cooling processes. Overall, the described arrangement provides improved efficiency, reliability and serviceability for direct liquid cooling of IT infrastructures.According to one embodiment of the invention, the arrangement comprises a configuration for controlling a multiplicity of plug-in devices, which is stored in an external memory and is connected to the control device for the data transmission. This configuration enables efficient management and control of the plug-in devices by storing the control data not in the control device itself, but in a separate memory. The external memory may store a variety of configuration data required for the operation and control of the slot machines. This offers the advantage that the control device is relieved and more computing power is available for other tasks. In addition, the external memory can be easily updated or expanded without requiring changes to the control device. The connection between the control device and the external memory takes place via a data transmission interface, which ensures rapid and reliable communication. This interface may support various communication protocols to enable flexible and customizable data transfer. A further advantage of this arrangement is the increased scalability, since additional plug-in devices can be integrated simply by adapting the configuration stored in the external memory. This facilitates the extension of the IT infrastructure and the adaptation to changing requirements. The security is also increased by the removal of the configuration data from an external memory, since sensitive control data are not directly stored in the control device and can thus be better protected against unauthorized access. The use of an external memory also allows central management of the configuration data, which simplifies maintenance and management of the IT infrastructure. Overall, this arrangement provides a flexible, scalable and secure solution for the direct liquid cooling of an IT infrastructure, which allows efficient and reliable control of the plug-in devices by relieving the control device and the central management of the configuration data.According to one embodiment, the arrangement for the direct liquid cooling of an IT infrastructure is designed such that the control device is configured to take over the configuration from the memory at least for its first configuration. This means that the control device automatically loads the necessary configuration data from a predefined memory area during the first startup or after a reset and configures itself accordingly. The memory can be designed as a non-volatile memory, so that the configuration data are retained even after a power failure or a restart. This approach offers several advantages. On the one hand, the installation and startup process is considerably simplified, since no manual configuration of the control unit is required. This saves time and reduces the probability of configuration errors. On the other hand, the reliability of the system increases, since the configuration data are always taken over consistently and correctly from the memory. This is especially important in IT infrastructures, where fault-free and efficient cooling is decisive for the operating stability of the entire installation. Moreover, this automation allows for a quick recovery of the system after maintenance work or unexpected failures, as the controller is immediately operational again once power is recovered. A further advantage is the flexibility of the system expansion. New plug-in devices can be easily added and the control device automatically assumes its configuration from the memory without the need for manual adaptation. This facilitates the scalability of the IT infrastructure and enables dynamic adaptation to changing requirements. The self-addressing of the bus system in combination with the automatic configuration take-over from the memory ensures that new devices can be integrated seamlessly into the existing system. This reduces down times and increases the efficiency of the maintenance processes. Overall, this embodiment helps to reduce operating costs and maximize the availability of the IT infrastructure by offering a robust, flexible and user-friendly solution for direct liquid cooling.According to an embodiment, the arrangement for direct liquid cooling of an IT infrastructure comprising at least one IT rack with a plurality of trays for trays has specific communication mechanisms that optimize the interaction between the components. The second plug-in devices are equipped with a unique device identifier. This unique device identifier enables the plug-in devices to be configured via an associated device configuration. This means that each plug-in device can be identified not only individually, but also specific configuration data are assigned, which are based on this identification. The advantage of this arrangement is the improved management and control of the plug-in devices within the IT rack. The unique device identifier ensures that each device can be correctly addressed and configured, which increases the efficiency and reliability of the entire IT infrastructure. The configuration via the unique device identifier enables automatic adaptation and optimization of the operating parameters of the plug-in devices, which leads to improved performance and a reduction of errors. Moreover, this arrangement contributes to simplification of maintenance and replacement of plug-in devices, since the unique device identifier enables rapid and precise identification. This is particularly advantageous in large data centers where a plurality of plug-in devices are operated and manual configuration can be time consuming and prone to errors. The assignment of the device configuration via the unique device identifier ensures that the plug-in devices are always configured in an optimum manner, which improves the efficiency of the cooling and thus the overall performance of the IT infrastructure. In addition, this arrangement increases the scalability of the IT infrastructure, since new plug-in devices can be integrated into the existing system without problems, without requiring extensive manual configuration work. The self-addressing of the bus system in combination with the unique device identifier of the plug-in devices leads to automated and intelligent management of the IT infrastructure, which reduces operating costs and increases reliability.According to one embodiment of the invention, the arrangement for the direct liquid cooling of an IT infrastructure comprises at least one IT rack with a plurality of inserts for insertion devices of a direct liquid cooling and / or an IT infrastructure. The arrangement contains a bus system with a control device, which has a bus with a plurality of data interfaces for the connection of plug-in devices of a direct liquid cooling system. The bus system is designed such that it enables self-addressing for plug-in devices which can be connected to the bus for direct liquid cooling. In this specific embodiment, at least one second plug-in device or a further electrical module, such as a fan, for direct liquid cooling is connected via the bus to the control device for signal transmission. This second component or module is configured such that it assumes a default operating state in the event of an interruption of the signal transmission via the bus and / or in the event of a failure of the control unit. The default operating state ensures that the IT infrastructure can continue to be operated in a safe and stable state even if communication with the control device is interrupted. This provides the advantage of increasing the reliability and availability of the IT infrastructure by minimizing potential down times. The ability of the components to transition to a default operating state helps critical systems continue to be cooled and operated, which is of great importance particularly in data centers and other IT environments. A further advantage of this arrangement is the flexibility and scalability which is achieved by the bus system with self-addressing. This enables simple and efficient integration of new plug-in devices or assemblies without complicated manual configuration processes. Self-addressing facilitates the management and monitoring of the connected devices, since each device automatically receives a unique address and can thus be integrated seamlessly into the existing system. This results in a reduction in management cost and an increase in operation efficiency. The use of a bus for signal transmission between the components and the control device enables central control and monitoring, which simplifies maintenance and fault diagnosis. Overall, this arrangement provides a robust and flexible solution for direct liquid cooling in IT infrastructures that improves both operational safety and efficiency.Further details of the invention are explained with reference to the following figures. The following shows: FIG. 1 shows a schematic illustration of a direct liquid cooling system; FIG. 2 shows an exemplary embodiment of an insertion device designed as a pump unit; FIG. 3 shows an exemplary embodiment of a direct liquid cooling with additional back door air cooling; FIG. 4 shows a schematic illustration of an exemplary embodiment of an insertion device; FIG. 5 shows a further embodiment of an insertion device; FIG. 6 shows yet another embodiment of an insertion device; FIG. 7 shows a schematic illustration of an exemplary embodiment of an insertion device designed as a control device, having a drawer arrangement with a drawer body and a drawer; FIG. 8 shows an embodiment of an arrangement according to the invention in front view (a) and side view (b); and FIG. 9 shows a further embodiment of an arrangement according to the invention in a side view of the IT rack.FIG. 1 shows a schematic illustration of a direct liquid cooling system DLC. Cooled liquid is provided by a recooler 16, which can be designed, for example, as a chiller, with or without a refrigerating machine. For this purpose, the recooler 16 has, in particular, an air-liquid heat exchanger and at least one fan, with which ambient air is transported through the air-liquid heat exchanger. The cooled liquid provided by the recooler is supplied to a coolant distribution unit CDU, in particular via the flow line of an outer circuit of the CDU. Via a return of the outer circuit, the liquid provided by the recooler leaves the CDU as heated liquid and the outer circuit of the CDU, which at the same time forms the liquid circuit of the recooler 16, is marked with the reference numeral 17.The coolant distribution unit CDU has, in particular, a liquid-liquid heat exchanger and at least one pump in order to transport liquid through the inner circuit 15 of the CDU. The flow of the inner circuit of the CDU is connected to a return of a coolant distribution channel and the return of the inner circuit 15 of the CDU is connected to a flow of the coolant distribution channel 7. The coolant distribution channel 7 can have a plurality of connections spaced apart from one another in the longitudinal direction, and therefore in the vertical direction, on the one hand to a flow of the coolant distribution channel 7, via which cooled coolant is provided, and on the other hand to a return of the coolant distribution channel 7, via which heated coolant is discharged.The plug-in devices 2 can be, for example, server plugs of an IT infrastructure, which are connected to the distribution channel 7, for example, in the manner known from US 2007 / 0 274 043 A1. In the plug-in devices, the cooling liquid, which is preferably an electrically non-conductive refrigerant, flows over the components requiring cooling, for example CPUs or GPUs, or another component which has a high power loss and otherwise a high temperature sensitivity, so that air cooling is unsuitable on account of the lower thermal conductivity of air compared to liquid.The schematic illustration shows the liquid circuit of the direct liquid cooling DLC in an IT rack. The cooled liquid is transported from the recooler 16 via the outer circuit 17 to the coolant distribution unit CDU. Within the CDU, the liquid is passed through a liquid-to-liquid heat exchanger and at least one pump. The inner circuit 15 of the CDU guides the cooled liquid to the coolant distribution channel 7, which is arranged vertically in the IT rack. The coolant distribution channel 7 distributes the cooled liquid to the various drawers 2 arranged in the drawers of the IT rack.The plug-in devices 2 are designed such that the cooling liquid flows over the components requiring cooling, such as CPUs or GPUs, and absorbs the heat that arises. The heated cooling liquid is then conducted via the return of the coolant distribution channel 7 back to the CDU, where it is cooled again. The return of the CDU inner circuit 15 returns the heated liquid to the recooler 16 where the cycle begins anew.This arrangement allows for efficient cooling of the IT infrastructure by dissipating the heat directly from the components, thereby eliminating the need for less efficient air cooling. The use of a non-conductive refrigerant ensures that the electrical components are not damaged, while the high thermal conductivity of the liquid ensures effective cooling.FIG. 2 shows an exemplary embodiment of an insertion device which can be used in an arrangement according to the invention. The plug-in device 2.1 has a housing 13 which can be standardized, for example, with respect to its dimensions, for example at least to the effect that, when the plug-in device 2.1 is inserted into a plug-in of an IT rack, both the first and the second blind coupling plug connection 6.1, 6.2 can be contacted automatically, that is to say in particular without tools, for the electrical contacting of the current distribution on the one hand and the fluidic connection to the direct liquid cooling, in particular a coolant distributor channel.Three redundant pumps 14 are arranged in the housing 13, which are in particular connected in parallel to one another. This parallel connection of the pumps 14 ensures a high degree of insensitivity to failure of the pump unit. Furthermore, a heat exchanger 12, in particular a liquid-liquid heat exchanger, is arranged in the housing 13. The only active components within the housing 13 are thus the pumps 14 which are provided in triplicate and connected in parallel.The pump unit shown in FIG. 2 thus has a very high degree of insensitivity to failure. Due to the use of the first and the second blind coupling plug connectors 6.1, 6.2, the entire unit, i.e. the plug-in device 2.1, can be replaced quickly and without relevant downtime in the event of failure of all pumps or with a decreasing pump output. A further redundancy of the direct liquid cooling DLC can be achieved by providing a plurality of the plug-in devices 2.1 shown in FIG. 2 which are in turn connected in parallel with one another, so that even if all of the presently three pumps 14 of one of the plurality of plug-in devices 2.1 fail, the continued operation of the DLC is ensured and downtime can be substantially completely avoided.The blind coupling plug connectors 6.1, 6.2 enable a tool-free connection both for the electrical contacting and for the fluidic connection. This facilitates the replacement and maintenance of the plug-in devices considerably. The redundant pumps 14 and the heat exchanger 12 are arranged in such a way that they ensure efficient cooling of the IT infrastructure.FIG. 3 shows an embodiment in which the arrangement according to the invention is accommodated in a switchgear cabinet housing which is designed in the manner of an IT cabinet having a plurality of 19-inch inserts which are arranged vertically one above the other. The plug-in devices 2.1 in the plug-in devices 2 of the IT rack 1 are partially occupied by servers and partially by plug-in devices 2.1 for direct liquid cooling. For example, an uppermost slot 2 of the IT rack 1 is occupied by a DC voltage supply 3 which is provided as a built-in device 2.1. A lower insert 2 is occupied by a coolant distribution unit CDU.On a rear side of the IT rack 1, a coolant distribution channel 7 is arranged with its feed line and its return line. The feed line and the return line of the coolant distribution channel 7 are connected to the coolant distribution unit CDU. A rear door heat exchanger 200 is connected to the rear side of the IT rack 1. This has an air-liquid heat exchanger and a plurality of fans. With the aid of the back door heat exchanger, cooled air is drawn in via the front side of the IT rack 1 through the IT rack 1, past the server inserts 2.1 in need of cooling into the back door heat exchanger 200, where the heated air passes the air-liquid heat exchanger and is blown out as cooled air into the environment of the housing.The flow of the air-liquid heat exchanger of the back door cooling device 200 is fed by a back cooler 16, for example a chiller. The return line of the air-liquid heat exchanger of the back door cooling device 200 is connected to a forward line of an outer circuit of the CDU. The heated liquid discharged from the air-liquid heat exchangers thus serves as a heat sink with respect to the CDU. A liquid-liquid heat exchanger 12 is arranged in the CDU, via which heat is transferred from an inner circuit of the CDU, by means of which the CDU is connected to the coolant distribution channel 7, to the outer circuit of the CDU.All plug-in devices 2.1, except for the DC voltage supply 3 itself, can be designed as DC devices which are operated, for example, at an operating voltage of 48 V. The entire current distribution within the IT rack can thus take place at a DC voltage level which is less dangerous in comparison to the mains voltage, whereby the operational reliability of the IT rack is increased. The modular construction of direct liquid cooling also allows the expansion vessel 10 to be arranged, for example, in a manner advantageous for operation on an upper side of the IT rack 1, that is to say in particular above the coolant distribution channel 7.The coolant distribution unit CDU comprises a plurality of pumps 14 which are designed redundantly in order to ensure continuous coolant circulation. The pumps 14 are connected in parallel in order to maintain the function of the other pumps in the event of a failure of one pump. The liquid-liquid heat exchanger 12 in the CDU enables efficient transfer of the heat from the inner circuit to the outer circuit, wherein the inner circuit is connected to the coolant distribution channel 7 and the outer circuit gives off the heat to the recooler 16.The back door heat exchanger 200 is designed to receive and direct the warm air flowing through the server trays 2.1 through the air-liquid heat exchanger. The fans of the back door heat exchanger 200 provide sufficient air circulation to efficiently cool the heated air and release the cooled air back to the environment. This helps maintain an optimal operating temperature of the servers and other IT components.In summary, FIG. 3 shows a detailed arrangement of an IT rack 1 with integrated direct liquid cooling DLC, wherein the various components such as the DC voltage supply 3, the coolant distribution unit CDU, the coolant distribution channel 7 and the back door heat exchanger 200 cooperate in a modular and efficient system in order to ensure reliable and secure cooling of the IT infrastructure.FIGS. 4 and 5 show different expansion stages of an insertion device 2.1, which is designed as a pump unit RPU in the embodiment according to FIG. 4. The RPU shown in FIG. 4 has only two pumps 14 connected in parallel, which are accommodated in a housing 13 with two power supply units 19, one for each of the pumps 14. A first blind coupling connector 6.1 serves for connection to the DC voltage source and a pair of second blind coupling connectors 6.2 serve for connection to the inner circle of the DLC, so that the pump unit RPU shown in FIG. 4 can be used to impinge the coolant distribution channel (not shown) of the DLC with cooled coolant.In an extension of the embodiment shown in FIG. 4, not only is a liquid-liquid heat exchanger 12 provided in the embodiment shown in FIG. 5, but the pumps 14 are furthermore designed to be redundant three times. Accordingly, three power supplies 19 are also provided for the independent supply of the three pumps 14. The embodiment shown in FIG. 5 is suitable, for example, for use in a switchgear cabinet according to FIG. 3, in which the outer circuit of the CDU is connected to an air-liquid heat exchanger, for example to such a heat exchanger of a rear door cooling device 200.In addition, in the embodiment shown in FIG. 5, a third blind coupling plug connector 6.3 is provided, which serves for connecting the outer circuit of the liquid-liquid heat exchanger 12 to a recooler. This allows efficient heat dissipation from the system by cooling the internal circulation coolant liquid by the liquid-to-liquid heat exchanger 12 before being returned to the coolant distribution channel of the DLC.The embodiments shown in FIGS. 4 and 5 illustrate the flexibility and scalability of the pump unit RPU within an IT rack, wherein the redundancy and the additional cooling capacity ensure a higher operational reliability and efficiency by using a liquid-liquid heat exchanger 12 in the embodiment according to FIG. 5.FIG. 6 shows an alternative embodiment of the direct liquid cooling DLC for an IT infrastructure, which differs from the embodiment shown in FIG. 5. In this embodiment, an air-liquid heat exchanger 12 is provided instead of a liquid-liquid heat exchanger. The air-liquid heat exchanger 12 is arranged in a housing 13 and is supported by a pair of fans 20 which provide the necessary air circulation to optimize heat transfer.In addition, an expansion vessel 10 is integrated in the housing 13, which serves to compensate for volume fluctuations of the coolant and thus stabilize the pressure in the cooling circuit.A pair of redundant pumps 14 are also housed in the housing 13. These pumps are responsible for the liquid transport within the cooling circuit and ensure high operational reliability due to their redundancy. Each of the pumps 14 is powered by its own independent power supply 19 to ensure continuous power supply and provide fail-safe performance.The power supplies 19 are referred to as PSU 1 and PSU 2 and are disposed in the upper left corner of the housing 13. These power supplies are independent of each other to maximize redundancy and increase system reliability.The figure also shows a plurality of sensors, including temperature sensors T and pressure sensors P, which are used to monitor the operating conditions of the system. A filter F is also integrated to remove contaminants from the coolant and to extend the life of the components.The configuration shown shows how the various components of the direct liquid cooling DLC are integrated in a compact housing 13 in order to ensure efficient and reliable cooling of the IT infrastructure. The use of air-liquid heat exchangers and redundant pumps and independent power supplies ensures that the system continues to remain functional even in the event of failure of individual components.FIG. 7 schematically shows a top view of a plug-in device 2.1 designed as a control device. The control device comprises a drawer arrangement having a drawer body 21 which can be accommodated in one of the drawers 2, and a drawer 22 which can be pushed into the drawer body 21. In FIG. 7, the drawer 22 is in a fully inserted position. The drawer 22 is divided into two regions 22.1 and 22.2, both of which have a rectangular basic shape. The second region 22.2 is smaller than the first region 22.1, so that a rear region 21.1 of the drawer body 21 is not occupied by the drawer 22. In this region 21.1, the DC voltage supply 3, a DC connection 3.1 and a first blind coupling plug connector 6.1 for connecting the drawer body 21 to a busbar are arranged.The arrangement of the area 21.1 enables that, when the drawer 22 is moved into an at least partially extended position, the components arranged in the area 21.1 remain fully functional and are in electronic contact and / or signal connection with further plug-in devices 2.1 or other components of the housing. Regardless of the position of the drawer 22, the DC voltage supply 3 can therefore apply direct current to the busbar 5 and thus to further plug-in devices 2.1 via the first blind coupling plug connector 6.1 and supply current via the DC connection 3.1 to different systems or components which are not connected to the busbar 5. These systems and components can be, for example, the back door cooling device 200, a fan or heat exchanger unit arranged next to the housing or IT rack 1, but also electrical loads, such as pumps of a CDU or RPU, which are not arranged in an insertion device 2.1.The drawer 22 comprises a control device 9 and three CMC modules 29 for connecting sensors, redundant power supplies or DC-DC converters 24. the CMC modules 29 are analog components for connecting different types of sensors (pressure, temperature, pH, conductivity, leakage, etc.). Thus, measured values from sensors which are arranged outside the control unit can also be detected, passed on to the control unit 9 and used for the control. The drawer 22 can be connected to a data bus of the arrangement via a third blind coupling plug connector 6.3, which has a male and a female part, which are guided relative to one another via a self-centering 31.The blind coupling plug connector 6.3 of the drawer body 21 is connected to the data bus and the blind coupling plug connector 6.3 of the drawer 22 is connected to the control device 9. The blind coupling plug connector 6.3 is arranged such that the complementary blind coupling plug connectors 6.3 assume a plug connection when the drawer 22 is completely inserted into the drawer body 21, whereby a tool-free connection of the drawer 22 to the data bus is achieved.The drawer 22 furthermore has a sensor system, which has the advantage that components of the sensor system can also be easily exchanged or maintained and a cable path to the control unit can be kept short. A temperature and humidity sensor 23 is provided on the front side of the drawer 22, and an air differential pressure sensor 26 is provided on one side of the drawer 22. The air differential pressure sensor 26 has an air hose 27 which is guided to the rear along the drawer 22 and is connected there via hollow centering pins 28 for measuring the air pressure at the rear side of the IT rack 1. On the basis of the air difference pressure and / or a detected temperature or humidity, the control device 9 can control at least one second plug-in device 2.1.The drawer arrangement can have at least one sensor on opposite end sides for determining a measurement variable relating to the environment of the drawer arrangement, preferably a sensor of the same type for determining the same physical measurement variable. Thus, with the sensors arranged on the opposite end sides, a difference measurement can be provided, preferably an air pressure difference measurement or an air temperature difference measurement. This is advantageous in particular when the IT rack is set up between a cold and a warm gear, since a differential measurement between cold and warm gear can be carried out in this way and the DLC can be controlled in such a way that desired conditions can be provided.The components accommodated in the drawer 22 are both connected to one another and in contact with the blind coupling plug connector 6.3. This includes electrical contacting and signal transmission. The connection 30 can therefore represent both an electrical conductor and a signal line. For example, the CMC modules 29 communicate with the control device 9 via a Can bus, but are simultaneously electrically connected to the blind coupling plug connector 6.3 for the purpose of supplying power. Furthermore, the drawer can have communication interfaces 25, such as USB, USB-C or also Bluetooth, for example, in order to enable external access to the control device 9 and / or to provide information on external devices.The plug-in device 2.1 of FIG. 7, which is designed as a drawer arrangement, can be designed to be capable of hot-swap, in particular with respect to an electrical connection to a power supply and / or a connection to a data bus. As a result, the IT rack 1 can be operated further even when the drawer 22 is removed or exchanged from the IT rack 1. In the drawer arrangement, the hot-swap capability is implemented primarily by the blind coupling plug connectors 6.1, 6.3 in that no short circuit or other electrical fault is caused in the IT rack 1 during contacting or removal.Furthermore, the control device can have a memory or be communicatively connected to a memory which is formed independently of the control device and in which a configuration for controlling a plurality of second plug-in devices 2.1 is contained, wherein the plurality of second plug-in devices 2.1 is connected via a data bus to the control device for the data transmission and has no dedicated controller. The configuration stored in the memory allows the plurality of second plug-in devices 2.1 to continue operation even if the control device 9 is defective or out of operation. The storage can be arranged, for example, in the region 21.2, so that it is usable independently of a positioning of the drawer 22. Alternatively or additionally, an external memory can also be contacted via the communication interface 25.The control device can likewise be configured to take over the configuration from the memory at least for its first configuration, i.e. the control device 9 can be configured on the basis of the first configuration. As a result, after an exchange of the control unit 9, an operability of the control unit can be achieved almost immediately. Alternatively or additionally, the second plug-in devices 2.1 can have a unique device identifier, wherein the configuration has a device configuration assigned via the unique device identifier for at least some of the second plug-in devices 2.1.Finally, it can also be provided that at least one second plug-in device 2.1 or a further electrical assembly, for example a fan, of the direct liquid cooling system DLC is connected via a data bus to the control device 9 for a signal transmission, wherein the second plug-in device 2.1 or the further electrical assembly is configured to assume a default operating state in the event of an interruption of the signal transmission via the data bus and / or in the event of a failure of the control device. Thus, for example, it can be provided that a microchip is arranged in a plug-in device 2.1 of the DLC, which microchip contains a standard configuration for components contained in the plug-in device 2.1, so that uninterrupted operation of the IT rack 1 is possible.FIG. 8 shows in front view a and in side view b an exemplary embodiment of an arrangement for supplying direct liquid cooling with electrical energy. The arrangement has an IT rack 1, which has a plurality of inserts 2 for insert devices 2.1 of direct liquid cooling, which inserts are arranged one above the other in the height direction z. In addition to the plug-in devices 2.1 for direct liquid cooling, further plug-in devices 2.1 are also provided, which are designed as servers in the present case. The rectifier PSU is also designed as a plug-in device 2.1. Along the rear side R of the IT rack 1, a busbar of a DC voltage supply 3 for the inserts 2 or insert devices 2.1 accommodated therein extends as the current distribution 5. The busbar is fed by the rectifier PSU, in particular supplied with a DC voltage. The plug-in devices 2.1 of the direct liquid cooling system DLC, insofar as they require a supply of electrical energy, are accommodated in one of the plug-in devices 2 in each case and are electrically contacted with the busbar. The expansion vessel 10, which does not require an electric power supply, is arranged at a position which is advantageous from a physical point of view on the upper side, that is to say otherwise outside the IT rack 1. A control unit 9 is designed independently of other assemblies of the DLC as a separate plug-in unit and is contacted directly at the DC voltage supply 3, in particular at the busbar of the current distribution 5. The plug-in devices 2.1 have first blind coupling plug-in connectors 6.1 for the tool-free connection of the plug-in devices 2.1 to the busbar. Complementary blind coupling plug connectors can be arranged on the rear side of housings of the plug-in devices 2.1 facing the busbar. In an analogous manner, for the connection to a feed line and a return line of the coolant distribution channel 7, second blind coupling plug connectors, which are liquid-conducting, can be arranged on the rear side.The bus system 40 is a central component of the arrangement and comprises the control device 9, the bus 41 and a plurality of data interfaces 42. The control device 9 is configured to communicate via the bus 41 with the data interfaces 42 which extend along the height direction z of the IT rack 1. These data interfaces 42 enable the connection and communication with the plug-in devices 2.1 of the direct liquid cooling system DLC. The bus system 40 is equipped with a self-addressing function which allows the connected plug-in devices 2.1 to be automatically addressed and identified. For this purpose, bus system 40 reads out at least one unique identifier of a plug-in device 2.1 connected to bus 41 or of at least one module of plug-in device 2.1. On the basis of this read-out identifier, the control device 9 can determine an addressing of the corresponding plug-in device 2.1, which addressing is stored in a memory 9.1 and is identified by the read-out identifier.The plug-in devices 2.1, the control device 9 and the housings 13 of the plug-in devices are designed to be capable of hot-swap. This means that they can be exchanged during operation without the need to interrupt the power supply or the coolant supply. For this purpose, the plug-in devices 2.1 are equipped with data interfaces 42 on their rear side, which enable a simple and secure connection to the bus 41. This hot swap capability significantly increases the flexibility and maintainability of the assembly.While the embodiment shown in FIG. 8 has both server installations and components requiring cooling and also various assemblies of a direct liquid cooling system DLC for cooling the servers, in the embodiment shown in FIG. 9 the IT rack 1 is equipped exclusively with components of a direct liquid cooling system DLC. In particular, a plurality of the plug-in devices 2.1 are designed as redundant pump units RPU. These can be designed, for example, as one of the embodiments according to FIGS. 2 and 4. The two plug-in devices 2.1 form the heat exchanger 12 and the expansion vessel 10. Moreover, the arrangement ensures that all components and devices for the current distribution, in particular the busbar 5, are at a low DC voltage, for example 48 V.The arrangement shown in FIG. 9 shows an IT rack 1 which contains a plurality of plug-in devices 2.1 in the form of RPU modules. These RPU modules are arranged one above the other along the height direction z of the IT rack 1 and are inserted into the inserts 2 via the linear guide 8. Each RPU module is connected to the busbar 5 and to the coolant distribution duct 7 by a first blind coupling plug connector 6.1. The blind coupling plug connectors 6.1 and 6.2 enable a tool-free connection of the RPU modules to the power supply and the coolant circuit.The control device 9, which is likewise designed as a plug-in device 2.1, is located in the upper region of the IT rack 1 and is connected to the other components via the bus 41. The control device 9 monitors and controls the operating parameters of the RPU modules and other connected modules. The bus 41 enables data communication between the control device 9 and the RPU modules and other components of the direct liquid cooling system DLC.The expansion vessel 10 and the heat exchanger 12 are accommodated in separate plug-in devices 11 which are located in the lower region of the IT rack 1. The expansion vessel 10 serves to accommodate variations in the volume of the coolant, while the heat exchanger 12 allows heat to be transferred between the coolant and an external recooler. Both components are connected to the coolant distribution channel 7 via corresponding blind coupling plug connectors 6.1 and 6.2.The DC power supply 3 located in the upper portion of the IT rack 1 converts the applied DC power into a low DC power required for the operation of the RPU modules and other components. This DC power supply 3 is the only component directly supplied with mains voltage. All other components and devices are designed for a low DC voltage, for example 48 V, in order to ensure the safety and efficiency of the current distribution.In summary, the embodiment shown in FIG. 9 shows an IT rack 1 which is equipped exclusively with components of a direct liquid cooling system DLC. The redundant pump units RPU, the control unit 9, the expansion vessel 10, the heat exchanger 12 and the DC voltage supply 3 are integrated into the IT rack 1 as plug-in devices 2.1 and are connected to one another via a bus system 40. This arrangement ensures efficient and reliable cooling of the IT infrastructure by direct liquid cooling DLC.The features given in the aforementioned description may be relevant in any combination for the realization of embodiments of the invention, the scope of protection being determined solely by the claims.LIST OF REFERENCE CHARACTERS1 IT rack 2 plug-in 2.1 plug-in device 3 DC voltage supply 3.1 DC connection 5 busbar 6.1 first blind coupling plug-in connector 6.2 second blind coupling plug-in connector 6.3 third blind coupling plug-in connector 7 coolant distributor channel 8 linear guide 9 control device 9.1 storage device 10 expansion vessel 11 further plug-in device 12 heat exchanger 13 housing 14 pump 15 inner circuit 16 recooler 17 outer circuit 19 power supply unit 20 fan 21 drawer body 21.1 rear region of the drawer body 22 drawer 22.1 first region of the drawer 22.2 second region of the drawer 23 temperature and moisture sensor 24 power supplies, DCDC converter 25 communication interfaces 26 air differential pressure sensor 27 air hose 28 hollow centering pins 29 CMC modules 30 electrical conductor, Signal line 31 Self-centering 40 Bus system 41 Bus 42 Data interface 200 Rear door cooling device BBU Interruption of free power supply CDU Coolant distribution unit DLC Direct liquid cooling PSU Rectifier RPU Pump unit R Rear side x Plug-in direction z Height direction

Claims

Arrangement for the direct liquid cooling (DLC) of an IT infrastructure, wherein the arrangement has at least one IT rack (1) with a plurality of inserts (2) for insert devices (2.1) of a direct liquid cooling (DLC) and / or an IT infrastructure, wherein the arrangement has a bus system (40) with a control device (9) which has a bus (41) with a plurality of data interfaces (42) for the connection of insert devices (2.1) of a direct liquid cooling (DLC), characterized in that the bus system (40) has self-addressing for insert devices (2.1) of a direct liquid cooling (DLC) which can be connected to the bus (41).Arrangement according to Claim 1, in which the inserts (2) are arranged one above the other in the height direction (z) of the IT rack (1), wherein the bus (41), preferably a CAN bus, has a bus line extending along the height direction (z) with a plurality of plug connectors as data interface (42).Arrangement according to Claim 1 or 2, in which the bus system (40) is designed to read out at least one unique identifier of an insertion device (2.1) connected to the bus (41) or of at least one assembly of the insertion device (2.1) for the self-addressing.Arrangement according to Claim 3, in which the bus system (41) is set up to determine, on the basis of the read-out identifier, an addressing, stored in a memory (9.1) of the control unit (9) and identified with the read-out identifier, of the plug-in device (2.1) having the unique identifier or of the at least one assembly of the plug-in device (2.1).Arrangement according to one of the preceding claims, which has at least one plug-in device (2.1) of a direct liquid cooling system (DLC) with at least one module addressed via the bus system (40), wherein the module has at least one and preferably a plurality of components which can be addressed independently of one another via the bus system (40).Arrangement according to Claim 5, in which the assembly has a plurality of components which can be addressed independently of one another via the bus system (40) and are preferably designed as identical parts and / or redundant with respect to one another.Arrangement according to Claim 5 or 6, in which the assembly is a pump unit of a coolant distribution unit (CDU) or of a reservoir and pumping unit (RPU) with at least one and preferably a plurality of pumps (14) designed as identical parts and / or redundant with respect to one another for the liquid transport.Arrangement according to one of the preceding claims, in which the bus system (40) is configured to read out operating data of at least one plug-in device (2.1) of a direct liquid cooling system (DLC), or of at least one assembly of the direct liquid cooling system (DLC), or of at least one component of the assembly, wherein the control device (9) is configured to determine a maintenance state, a remaining service life, or a wear state of the at least one plug-in device (2.1), of the at least one assembly, or of the at least one component on the basis of the operating data.Arrangement according to one of the preceding claims, in which the IT rack (1) accommodates devices, in particular plug-in devices (2.1), of a direct liquid cooling system (DLC), the IT rack being free of devices of an IT infrastructure.Arrangement according to claim 9, wherein the direct liquid cooling (DLC) devices are devices including plug-in devices (2.1) a coolant distribution unit (CDU) or a reservoir and pump unit (RPU).Arrangement according to claim 9 or 10, in which the device has a housing (13) in which at least one pump (14), preferably a plurality of redundant pumps (14), particularly preferably a plurality of pumps (14) connected in parallel, is accommodated.Arrangement according to claim 11, in which a plurality of, preferably a plurality of, apparatuses having a housing (13), preferably of identical design, are accommodated in the IT rack (1).Arrangement according to one of Claims 9 to 12, in which the devices for direct liquid cooling (DLC), in particular the plug-in devices (2.1), are designed to be capable of hot-swap, preferably with respect to a connection to a coolant circuit (15) for direct liquid cooling (DLC) and / or a connection to a power supply, in particular to a DC power distribution system (5) of the IT rack (1), preferably a DC busbar for the power distribution system (5).Arrangement according to one of Claims 9 to 12, in which at least one of the devices is an uninterrupted power supply (UPS) and / or a battery backup unit (BBU), which is designed to supply the devices of direct liquid cooling (DLC) with a DC voltage in the event of a power supply failure, in particular in the event of a power supply unit of direct liquid cooling (DLC) failure.Arrangement according to claim 14, wherein the seamless power supply (UPS) and / or the battery backup unit (BBU) is designed to be hot-swap capable, preferably with respect to a connection to a power connection and / or to a power distribution system (5) of the IT rack (1), preferably a DC busbar of the power distribution system (5).Arrangement according to Claim 14 or 15, in which a plurality of the devices are an uninterrupted power supply (UPS) and / or a battery backup unit (BBU), wherein the plurality of devices are redundant with respect to one another and can be exchanged independently of one another.Arrangement according to one of Claims 9 to 16, in which the control device (9) is one of the plug-in devices (2.1) of direct liquid cooling (DLC), wherein the control device (9) is designed to be capable of hot-swap, preferably with respect to a connection to the bus (41) and / or a connection to a power supply, in particular to a DC power distribution (5) of the IT rack (1), preferably a DC bus bar of the power distribution (5).Arrangement according to one of Claims 5 to 14, which has a plurality of plug-in devices (2.1), at least one of the plug-in devices (2.1) of which is a power supply unit (PSU), wherein the power supply unit (PSU) is designed to be capable of hot-swap, preferably with respect to a connection to a power connection and / or to a DC power distribution (5) of the IT rack (1), preferably a DC busbar of the power distribution (5).Arrangement according to Claim 15, in which the power supply unit (PSU) has a plurality of power supply units which are redundant to one another and can be exchanged independently of one another, the bus system (40) being configured to address the power supply units independently of one another.Arrangement according to one of the preceding claims, in which the IT rack (1) has a DC voltage supply (3) for plug-in devices (2.1) accommodated in the plugs (2), having a rectifier (PSU) and a current distribution (5), preferably a busbar, which runs along a rear side (R) of the IT rack (1) in the height direction (z) of the IT rack (1) and is supplied with a DC voltage by the rectifier (PSU), wherein at least one plug-in device (2.1) of a direct liquid cooling system (DLC) is accommodated in one of the plugs (2) and is electrically contacted with the current distribution (5).Arrangement according to Claim 20, in which a plurality of first blind coupling plug connectors (6.1) are arranged spaced apart from one another along the power distribution (5) in the height direction (z) for the tool-free connection of assemblies of direct liquid cooling (DLC) and / or an IT infrastructure to the power distribution (5).Arrangement according to Claim 20 or 21, in which the direct liquid cooling system (DLC) has at least one coolant distribution duct (7) which runs along the rear side (R) of the IT rack (1) in the height direction (z) of the IT rack (1), wherein a plurality of second blind coupling plug connectors (6.2) for the tool-free connection of assemblies of the direct liquid cooling system (DLC) and / or an IT infrastructure to the coolant distribution duct (7) are arranged at a distance from one another along the coolant distribution duct (7) in the height direction (z).Arrangement according to one of the preceding claims, in which the direct liquid cooling system (DLC) has a plurality of plug-in units (2.1), which are accommodated in one of the plug-in units (2) in each case, and of which at least two plug-in units (2.1) are designed as redundant plug-in units (2.1), preferably redundant pump units (RPU).Arrangement according to one of Claims 20 to 23, in which the rectifier (PSU) is designed as a plug-in device (2.1) which is accommodated in one of the plugs (2).Arrangement according to one of the preceding claims, in which at least one further plug-in device is accommodated or can be accommodated in at least one further of the plugs (2), wherein the at least one further plug-in device is a server or an uninterrupted power supply (BBU).Arrangement according to one of the preceding claims, in which the direct liquid cooling system (DLC) has at least one further plug-in device (11), preferably a coolant-carrying assembly of a coolant distribution unit (CDU) of the direct liquid cooling system (DLC), particularly preferably a heat exchanger (12) or an expansion vessel (10), wherein the further plug-in device (11) is accommodated in one of the plugs (2) without contact with the power distribution system (5), preferably a busbar.Arrangement according to one of the preceding claims, in which the inserts (2) of the IT rack (1) receive exclusively insertion devices (2.1, 11) of the direct liquid cooling (DLC).Arrangement according to Claim 27, in which one pump unit (RPU) forms a plurality of the plug-in devices (2.1), the plug-in devices (2.1) forming the pump unit (RPU) preferably being identical parts.Arrangement according to one of the preceding claims, in which one of the plug-in devices (2.1) is a control module which can have the control device (9) and which is inserted into one of the plug-in devices (2) and is configured to actuate at least one second plug-in device (2.1) of the direct liquid cooling system (DLC) which is inserted into a further one of the plug-in devices (2).Arrangement according to Claim 29, in which the second plug-in device (2.1) is connected to the control device (9) for the signal transmission via the bus, preferably a wired data bus, wherein the second plug-in device (2.1) preferably has no dedicated controller, in particular no control device (9).Arrangement according to one of the preceding claims, in which the bus of the arrangement can be connected to the control device (9) via a multipolar blind coupling plug connector (6.1), wherein the blind coupling plug connector (6.1) preferably has a male and a female part, which are particularly preferably guided relative to one another via a self-centering.Arrangement according to one of the preceding claims, in which the control device (9) has a power supply (3.1) for at least one second plug-in device (2.1) of direct liquid cooling (DLC) or for a further electrical load of direct liquid cooling (DLC).Arrangement according to one of the preceding claims, which has a multiplicity of second plug-in devices (2.1), wherein the control device (9) has a memory or is communicatively connected to a memory which is formed independently of the control device (9) and in which a configuration for controlling the multiplicity of second plug-in devices (2.1) is contained, wherein the multiplicity of second plug-in devices (2.1) is connected via the bus to the control device (9) for the data transmission and has no dedicated controller.

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