Communication link switching control circuit and data center management system

Abstract

The invention discloses a communication link switching control circuit and a data center management system. The circuit comprises a bus detection module and a communication link switching module, and the bus detection module is connected with the bus detection module and used for detecting the connection state of a power supply bus between first equipment and second equipment based on the 2N power supply architecture; the communication link switching module is connected with the bus detection module and is used for controlling the first equipment and the second equipment to be in communication connection through two communication links under the condition that the power supply bus is normally connected; and under the condition that the power supply bus is disconnected, the connection of the two communication links is disconnected, and the closed-loop connection of the communication interfaces of the first equipment and the second equipment is controlled respectively. According to the method and the device, the technical problem that communication abnormity is easily caused by communication link switching when the operation modes of the master and slave devices under the 2N power supply architecture are switched is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of communication control, in particular to a communication link switching control circuit and a data center management system. BACKGROUND

[0002] With the popularization of artificial intelligence and big data applications, AI intelligent data centers have become an important infrastructure to support modern information society. In order to ensure the continuity and security of data processing, data centers not only need to handle a large amount of complex IT load, but also must have a highly reliable power supply system. The traditional N-type power supply architecture lacks redundant power supply and has multiple single-point failure risks, resulting in insufficient protection of equipment. Although the N+X architecture improves the reliability of the system by providing additional power supply redundancy, it also has the disadvantages of rising costs and declining system efficiency. More advanced 2N and 2N+1 power supply architectures significantly improve the availability and fault tolerance of data centers through double power supply or higher redundancy design, but in actual application, especially in the communication switching between devices, still face challenges.

[0003] In the 2N architecture, two independent power supply systems are connected through a bus tie switch or a fuse during normal operation to maximize resource utilization. However, when the bus tie device is disconnected for switching or maintenance, the original communication link between the master and auxiliary devices will also be affected, which may result in data packet loss, frame error or complete communication interruption, which directly affects the stable operation and data processing efficiency of the data center. The existing solutions often fail to effectively manage the end impedance when switching between closed and disconnected communication links, or use excessive resistance and complex contact design, which not only increases the cost, but also reduces the overall efficiency and flexibility of the system. In addition, in the traditional 2N architecture, when the bus tie switch and the fuse are in series with the trigger relay, if any of the bus tie switch or the fuse fails, the relay contact switching may not be triggered correctly, thereby affecting the smooth communication between devices.

[0004] In view of the above problems, no effective solution has been proposed so far. SUMMARY

[0005] The embodiments of the present application provide a communication link switching control circuit and a data center management system to at least solve the technical problem that the master and slave devices in the 2N power supply architecture are prone to communication abnormalities when switching between operation modes due to communication link switching.

[0006] According to an aspect of the embodiments of the present application, a communication link switching control circuit is provided, comprising: a bus detection module, a communication link switching module, wherein the bus detection module is configured to detect a connection state of a power bus between a first device and a second device based on a 2N power supply architecture; the communication link switching module is connected to the bus detection module, and is configured to, in a case where the power bus is normally connected, control the first device and the second device to be connected in communication through two communication links; and in a case where the power bus is disconnected, disconnect the two communication links and control the first device and the second device to be connected in a closed loop through their own communication interfaces respectively.

[0007] Optionally, the first device comprises a first communication interface and a second communication interface, and the second device comprises a third communication interface and a fourth communication interface; the communication link switching module comprises a relay control module and an impedance matching module, the impedance matching module comprises a first resistor and a second resistor; the relay control module is configured to, in a case where the power bus is normally connected, control the first communication interface and the third communication interface to be connected, and control the second communication interface and the fourth communication interface to be connected; and in a case where the power bus is disconnected, control the first communication interface to be connected through the first resistor and the second communication interface, and control the third communication interface to be connected through the second resistor and the fourth communication interface.

[0008] Optionally, the relay control module comprises a first relay and a second relay, the first relay comprises a first common contact, a first normally open contact and a first normally closed contact, and the second relay comprises a second common contact, a second normally open contact and a second normally closed contact; the first common contact is connected to the second communication interface, the first normally open contact is connected to a first end of the first resistor, the first normally closed contact is connected to the fourth communication interface, a second end of the first resistor is connected to the first communication interface, the second common contact is connected to the third communication interface, the second normally open contact is connected to a first end of the second resistor, the second normally closed contact is connected to the first communication interface, and a second end of the second resistor is connected to the fourth communication interface; the bus detection module is configured to, in a case where the power bus is normally connected, de-energize the first relay and the second relay, and in a case where the power bus is disconnected, energize the first relay and the second relay.

[0009] Optionally, communication transmission is performed between the first communication interface and the third communication interface and between the second communication interface and the fourth communication interface based on an RS485 protocol.

[0010] Optionally, the first device comprises a first communication interface and a second communication interface, the second device comprises a third communication interface and a fourth communication interface, the third communication interface is connected with the fourth communication interface through a third resistor; the communication link switching module comprises a relay control module and an impedance matching module, the impedance matching module comprises a fourth resistor; the relay control module is configured to, in the case of normal connection of the power bus, control the first communication interface to be connected with the third communication interface and control the second communication interface to be connected with the fourth communication interface; in the case of disconnection of the power bus, control the first communication interface to be connected with the second communication interface through the fourth resistor and control the third communication interface to be connected with the fourth communication interface through the third resistor.

[0011] Optionally, the relay control module comprises a first relay and a second relay, the first relay comprises a first common contact, a first normally open contact and a first normally closed contact, the second relay comprises a second common contact and a second normally closed contact; the first common contact is connected with the second communication interface, the first normally open contact is connected with a first end of the fourth resistor, the first normally closed contact is connected with the fourth communication interface, a second end of the fourth resistor is connected with the first communication interface, the second common contact is connected with the third communication interface, the second normally closed contact is connected with the first communication interface, a first end of the third resistor is connected with the third communication interface, and a second end of the third resistor is connected with the fourth communication interface; the bus detection module is configured to, in the case of normal connection of the power bus, de-energize the first relay and the second relay, and in the case of disconnection of the power bus, energize the first relay and the second relay.

[0012] Optionally, communication transmission is performed between the first communication interface and the third communication interface and between the second communication interface and the fourth communication interface based on a CAN protocol.

[0013] Optionally, the bus detection module comprises a first switch associated with a bus tie switch on the power bus, the power bus is connected with the first relay and the second relay through the first switch; in the case of closing of the bus tie switch, the first switch is opened, the power bus de-energizes the first relay and the second relay, and in the case of opening of the bus tie switch, the first switch is closed, the power bus energizes the first relay and the second relay.

[0014] Optionally, the bus detection module comprises a second switch associated with a bus tie fuse on the power bus, the power bus is connected with the first relay and the second relay through the second switch; in the case of continuity of the bus tie fuse, the second switch is opened, the power bus de-energizes the first relay and the second relay, and in the case of disconnection of the bus tie fuse, the second switch is closed, the power bus energizes the first relay and the second relay.

[0015] Optionally, the bus detection module comprises a first switch associated with a bus tie switch on the power supply bus and a second switch associated with a bus tie fuse on the power supply bus, the power supply bus being connected to the first relay and the second relay through the parallel first switch and the second switch; the first switch is open when the bus tie switch is closed, the first switch is closed when the bus tie switch is open, the second switch is open when the bus tie fuse is connected, the second switch is closed when the bus tie fuse is blown, the power supply bus is powered off for the first relay and the second relay when the first switch and the second switch are both open, and the power supply bus is powered on for the first relay and the second relay when the first switch and / or the second switch is closed.

[0016] According to another aspect of the embodiments of the present application, a data center management system is also provided, comprising: a first device and a second device in master-slave relationship based on 2N power supply architecture, and the communication link switching control circuit.

[0017] Optionally, the device types of the first device and the second device include one of the following: power supply device, server device, network device, monitoring device, and storage device.

[0018] In the embodiments of the present application, when the power supply bus is closed, parallel communication is performed through the two communication links, which not only improves the data transmission rate, but also effectively shares the pressure of the main link through the link redundancy strategy, and realizes the optimal allocation of communication resources. When the power supply bus is disconnected due to maintenance, failure or switching operation, the bus detection module can quickly detect the state change and immediately trigger the communication link switching module to disconnect the original communication link between the two devices. At the same time, the module controls the first device and the second device respectively, and connects their respective communication interfaces in a closed loop to form an independent and complete communication loop, ensuring that the devices can still maintain stable internal communication without being affected by the outside world even in the extreme case of power supply bus disconnection, thereby solving the technical problem that the master-slave devices in the 2N power supply architecture are prone to communication abnormalities caused by communication link switching when the operating mode is switched. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings, which are included to provide a further understanding of the present application, constitute a part of the present application and illustrate the illustrative embodiments of the present application and its description, which serve to explain the present application, and do not constitute improper limitations on the present application. In the drawings:

[0020] Figure 1 is a structural schematic diagram of an optional communication link switching control circuit according to an embodiment of the present application;

[0021] Figure 2is a structure schematic diagram of an optional communication link switching module based on RS485 protocol under normal condition of a power supply bus according to an embodiment of the present application;

[0022] Figure 3 is a structure schematic diagram of a master-slave cabinet equipment communication link based on RS485 protocol under normal connection of a power supply bus according to an embodiment of the present application;

[0023] Figure 4 is a structure schematic diagram of a master-slave cabinet equipment communication link based on RS485 protocol under disconnection of a power supply bus according to an embodiment of the present application;

[0024] Figure 5 is a structure schematic diagram of an optional communication link switching module based on CAN protocol under normal condition of a power supply bus according to an embodiment of the present application;

[0025] Figure 6 is a structure schematic diagram of a master-slave cabinet equipment communication link based on CAN protocol under normal connection of a power supply bus according to an embodiment of the present application;

[0026] Figure 7 is a structure schematic diagram of a master-slave cabinet equipment communication link based on CAN protocol under disconnection of a power supply bus according to an embodiment of the present application;

[0027] Figure 8 is a structure schematic diagram of an optional bus detection module according to an embodiment of the present application;

[0028] Figure 9 is a structure schematic diagram of an optional data center management system according to an embodiment of the present application. DETAILED DESCRIPTION

[0029] In order to enable persons skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by persons skilled in the art without creative labor should belong to the protection scope of the present application.

[0030] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the drawings are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not have to be limited to only those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0031] In order to better understand the embodiments of the present application, first, some nouns or terms appearing in the description of the embodiments of the present application are translated and explained as follows:

[0032] CAN (Controller Area Network Bus) protocol: a serial communication protocol that effectively supports distributed real-time control. CAN bus was originally developed by Bosch for automotive applications, but has since been widely used in other industries, such as industrial automation, medical devices, aerospace, marine and rail transportation, etc. CAN bus protocol is designed to establish high-speed, reliable communication between devices, especially for applications that require real-time data exchange and control system integration.

[0033] Normally Open Contact (NC): generally represented by NC, in the non-energized state or non-energized state of the relay or contactor coil, the normally open contact is in the open state. When the coil is energized or energized, the normally open contact will close, allowing current to pass through. Normally open contacts are commonly used in situations where the circuit needs to be energized only under certain conditions, such as when a relay is activated, for example, as a switching point for signals in an automatic control circuit.

[0034] Normally Closed Contact (NC): generally represented by NC, in contrast to the normally open contact, the normally closed contact is closed in the non-energized state or non-energized state of the relay or contactor coil. When the coil is energized or energized, the normally closed contact will open, preventing current from passing through. Closed contacts are suitable for situations where the circuit needs to be kept open in the default state (i.e. non-energized state), for example, as a circuit breaker detection point in a safety system, when the system detects an anomaly, the contact is opened, triggering the alarm mechanism.

[0035] Common Contact: Generally represented by COM, the common contact is a contact in a relay that is paired with a normally open contact or a normally closed contact. It can connect with one of the normally open contact or the normally closed contact when the state of the relay changes, forming a path. The common contact provides flexibility in circuit design, allowing selection of connection with the normally open or normally closed contact according to the state of the relay. The common contact works with the normally open contact or the normally closed contact to build more complex circuit logic, such as implementing switching control of multiple device states in a control circuit.

[0036] Embodiment 1

[0037] According to another aspect of the embodiments of the present application, a communication link switching control circuit is provided, as shown in the figure, which includes at least: a bus detection module 11, a communication link switching module 12. Figure 1

[0038] The bus detection module 11 can detect the connection state of the power bus between the first device and the second device based on the 2N power supply architecture.

[0039] The communication link switching module 12, connected with the bus detection module, can control the communication connection between the first device and the second device through two communication links in the case of normal connection of the power bus; in the case of disconnection of the power bus, disconnect the connection of the two communication links and control the self-communication interface of the first device and the second device to be connected in a closed loop, respectively.

[0040] The functions of each module of the communication link switching control circuit will be described in detail in combination with the specific implementation process.

[0041] Specifically, the first device and the second device can communicate in the following ways, including but not limited to: communication transmission based on RS485 protocol, communication transmission based on CAN protocol.

[0042] The first device and the second device can share data based on any of the above protocols to realize communication connection, or in the case of disconnection of the power bus, independently perform data closed-loop transmission in their own internal using the protocol.

[0043] As an optional implementation, the communication transmission between the first communication interface and the third communication interface, and the communication transmission between the second communication interface and the fourth communication interface are both based on RS485 protocol, and the specific structure of the above circuit can be as follows:

[0044] ​As an optional implementation, the first device includes a first communication interface and a second communication interface, and the second device includes a third communication interface and a fourth communication interface; the communication link switching module includes a relay control module and an impedance matching module, and the impedance matching module includes a first resistor and a second resistor; the relay control module is used to control the connection of the first communication interface and the third communication interface, and the connection of the second communication interface and the fourth communication interface when the power supply bus is normally connected; and to control the connection of the first communication interface via the first resistor and the second communication interface, and the connection of the third communication interface via the second resistor and the fourth communication interface when the power supply bus is disconnected.

[0045] The core responsibility of the relay control module is to dynamically adjust the communication link between devices based on the connection status of the power supply bus. The impedance matching module includes a first resistor and a second resistor, typically set at 120Ω, but can be adjusted according to actual needs. The purpose of the impedance matching module is to ensure impedance matching of the communication link, avoid signal reflection and loss, and thus guarantee the stability and integrity of data transmission.

[0046] As an optional implementation, the relay control module includes a first relay and a second relay. The first relay includes a first common contact, a first normally open contact, and a first normally closed contact. The second relay includes a second common contact, a second normally open contact, and a second normally closed contact. The first common contact is connected to a second communication interface. The first normally open contact is connected to a first end of a first resistor. The first normally closed contact is connected to a fourth communication interface. The second end of the first resistor is connected to the first communication interface. The second common contact is connected to a third communication interface. The second normally open contact is connected to a first end of the second resistor. The second normally closed contact is connected to the first communication interface. The second end of the second resistor is connected to the fourth communication interface. A busbar detection module is used to de-energize the first and second relays when the power supply busbar is normally connected, and to energize the first and second relays when the power supply busbar is disconnected.

[0047] It should be noted that when the related communication interfaces communicate and transmit data based on the RS485 protocol, the relay control module may include a first relay and a second relay. Each of the two relays may be equipped with a common contact and a pair of normally open and normally closed contacts corresponding to the common contact. Alternatively, the relay control module may include only one relay, with two common contacts and a pair of normally open and normally closed contacts corresponding to each common contact. Both methods can achieve the same setting effect.

[0048] Figure 2 This diagram illustrates the structure of a communication link switching module based on the RS485 protocol under normal power supply bus conditions.

[0049] The following is combinedFigure 2 The working process of the communication link switching module based on the RS485 protocol is explained in detail:

[0050] When the power supply bus is in a normal connected state, the bus detection module ensures that the first and second relays are de-energized. At this time, the first common contact of the first relay connects to the fourth communication interface (RS485B point) of the auxiliary equipment, and its first normally closed contact connects to the first communication interface (RS485A point) of the main equipment; the second common contact of the second relay connects to the second communication interface (RS485B point) of the main equipment, while its second normally closed contact connects to the third communication interface (RS485A point) of the auxiliary equipment. In this way, the communication link between the first and second equipment is in parallel, ensuring high-speed and redundant data transmission. Specifically, Figure 3 A schematic diagram of a communication link between primary and secondary cabinet equipment based on the RS485 protocol is shown when the optional power supply bus is normally connected.

[0051] Furthermore, once the bus tie switch or fuse is tripped, the bus detection module immediately energizes the first and second relays, triggering a change in their contact states. At this time, the first normally open contact of the first relay is connected to one end of the first resistor, and the other end of the first resistor is connected to the first communication interface of the main equipment; the second normally open contact of the second relay is connected to one end of the second resistor, and the other end of the second resistor is connected to the fourth communication interface of the auxiliary equipment. Thus, the main equipment forms a closed-loop connection with its second communication interface through the first resistor, and the auxiliary equipment forms a closed-loop connection with its third communication interface through the second resistor. This ensures independent operation even when the bus is disconnected, while maintaining impedance matching at the end point and preventing data packet loss and communication anomalies. Figure 4 A schematic diagram of a communication link between primary and secondary cabinet equipment based on the RS485 protocol is shown when an optional power supply bus is disconnected.

[0052] Through the relay control module and impedance matching module, stable and reliable communication switching control between the main equipment and the auxiliary equipment can be achieved. Specifically, the main equipment includes a first communication interface and a second communication interface, while the auxiliary equipment includes a third communication interface and a fourth communication interface. The communication link switching control circuit between the two is optimized based on the RS485 protocol to ensure that communication between the equipment is not affected when the power supply bus status changes.

[0053] As an optional implementation, communication between the first and third communication interfaces, and between the second and fourth communication interfaces, is based on the CAN protocol. The specific structure of the above circuit can be as follows:

[0054] As an optional implementation, the first device includes a first communication interface and a second communication interface, and the second device includes a third communication interface and a fourth communication interface, with the third communication interface connected to the fourth communication interface via a third resistor; the communication link switching module includes a relay control module and an impedance matching module, with the impedance matching module including a fourth resistor; the relay control module is used to control the connection between the first and third communication interfaces and the connection between the second and fourth communication interfaces when the power supply bus is normally connected; and to control the connection between the first and second communication interfaces via the fourth resistor and the connection between the third and fourth communication interfaces when the power supply bus is disconnected.

[0055] As an optional implementation, the relay control module includes a first relay and a second relay. The first relay includes a first common contact, a first normally open contact, and a first normally closed contact. The second relay includes a second common contact and a second normally closed contact. The first common contact is connected to a second communication interface. The first normally open contact is connected to a first end of a fourth resistor. The first normally closed contact is connected to the fourth communication interface. The second end of the fourth resistor is connected to the first communication interface. The second common contact is connected to a third communication interface. The second normally closed contact is connected to the first communication interface. The first end of the third resistor is connected to the third communication interface. The second end of the third resistor is connected to the fourth communication interface. A busbar detection module is used to de-energize the first and second relays when the power supply busbar is normally connected, and to energize the first and second relays when the power supply busbar is disconnected.

[0056] Similarly, when the related communication interfaces communicate and transmit based on the CAN protocol, the relay control module may include a first relay and a second relay. Each of the two relays may be equipped with a common contact and a pair of normally open and normally closed contacts corresponding to the common contact. Alternatively, the relay control module may include only one relay, with two common contacts and a pair of normally open and normally closed contacts corresponding to each common contact. Both methods can achieve the same setting effect.

[0057] Figure 5 This diagram illustrates the structure of a communication link switching module based on the CAN protocol under normal power supply bus conditions.

[0058] Specifically, the first device mainly includes two communication interfaces: a first communication interface (e.g., a CAN+ contact) and a second communication interface (e.g., a CAN- contact). Similarly, the second device has two communication interfaces: a third communication interface (e.g., a CAN+ contact) and a fourth communication interface (e.g., a CAN- contact). The third and fourth communication interfaces are connected by a third resistor (e.g., 120Ω) to ensure impedance matching of the communication link when operating independently.

[0059] The following is combined Figure 5 The working process of the CAN protocol-based communication link switching module is explained in detail:

[0060] Specifically, the state changes of the first and second relays in the relay control module are controlled by the bus detection module in response to the closed or open state of the power supply bus. An impedance matching module introduces an additional resistor (e.g., a fourth 120Ω resistor) to ensure impedance matching of the internal communication link of the first device when the power supply bus is disconnected.

[0061] When the power supply bus is properly connected, the bus detection module ensures that the first and second relays are de-energized. Figure 6 A schematic diagram of a communication link between the main and auxiliary cabinet devices based on the CAN protocol is shown when the optional power supply bus is normally connected. The operating mechanism of the relay control module in this case is as follows:

[0062] First device: The first common contact of the first relay is connected to the second communication interface (CAN- contact), while the first normally closed contact is connected to the fourth communication interface (CAN- contact) of the second device, thus realizing direct communication between the devices. Second device: The second common contact of the second relay is connected to the third communication interface (CAN+ contact), and the second normally closed contact is connected to the first communication interface (CAN+ contact) of the first device, thereby forming a communication link between the two devices.

[0063] It should be noted that, compared to the RS485 protocol, through... Figure 3 and Figure 6In contrast, when the power supply bus is normally connected, using the CAN protocol requires an additional resistor. This is because the RS485 protocol requires terminating resistors to absorb signal reflections and reduce signal distortion. Typically, a terminating resistor is already configured at each end of the network, meaning the communication interface can be considered to have built-in resistors. Therefore, no additional resistor is needed in the middle. Furthermore, when the power supply bus is closed, the communication link between the main cabinet and the auxiliary cabinet is directly connected, but the link length and characteristic impedance between them remain unchanged. Therefore, the existing terminating resistors at both ends still meet the signal integrity requirements, and no additional parallel resistor is needed in the middle. However, for the CAN protocol, CAN network design requires each node to maintain impedance matching with the bus to reduce signal reflections and ensure signal quality. In a CAN network, a resistor (typically 120Ω) is usually connected in parallel on the CAN+ and CAN- lines of each node. This forms a stable differential voltage, ensuring correct signal decoding and transmission in a multi-node network. When the power supply bus is closed, the CAN communication link between the main cabinet and the auxiliary cabinet is directly connected. The parallel resistor in the middle is to ensure impedance matching of the entire connected link. This resistor serves as a supplement to the terminating resistor, helping to establish a stable differential voltage reference point, thereby maintaining the signal quality of the entire link and preventing signal reflection and distortion.

[0064] Therefore, the corresponding changes in the above circuit for different protocols are determined by the characteristics of the protocol itself.

[0065] When the bus tie switch or fuse trips, the bus detection module immediately energizes the first and second relays, triggering a change in the contact state and switching the communication link to adapt to the new power supply state. Figure 7 A schematic diagram of a communication link between the primary and secondary cabinet devices based on the CAN protocol is shown when an optional power supply bus is disconnected. The communication link switching mechanism is as follows:

[0066] First device: The first normally open contact of the first relay is connected to one end of the fourth resistor, and the other end of the resistor is connected to the first communication interface (CAN+ contact), ensuring the closed-loop formation and impedance matching of the internal communication link of the first device.

[0067] The second device: The third communication interface (CAN+ contact) forms a closed-loop connection with the fourth communication interface (CAN- contact) through the third resistor, which also achieves impedance matching and ensures the stability of the communication link when operating independently.

[0068] Under the corresponding communication protocol, whether it's direct connection when the power supply bus is closed or closed-loop communication when it's open, the reasonable configuration of contacts and resistors ensures the continuity and stability of data transmission, avoiding communication anomalies such as frame loss and packet loss. When the power supply bus is open, the first and second devices can each form an independent closed-loop communication link, achieving impedance matching through internal resistors to ensure efficient and stable communication even in independent operation mode. Compared with the redundant configuration of traditional N+X or 2N+1 systems, the circuit design in this embodiment reduces costs through simplified contact and resistor configurations, while also simplifying the circuit structure and improving the convenience of operation and maintenance. The automated contact switching and resistor matching mechanism can quickly respond to changes in the power supply bus status without manual intervention, reducing fault recovery time and enhancing the resilience and fault recovery capabilities of the data center in the face of power failures.

[0069] It's important to note that typically, a pair of normally open and normally closed contacts of a relay is used to control the switching of communication links between two devices (main cabinet and auxiliary cabinet). However, if the data center expands or more communication links need to be established between different devices, a relay with only one pair of contacts is insufficient. When the number of communication links increases, the control circuit can be expanded by selecting relays with multiple sets of contacts. For example, if switching control of communication links between two devices is required, a relay with four or more pairs of contacts can be used, with each pair of contacts corresponding to the communication interface control of one device. This allows for flexible switching of communication links between multiple devices without the need for additional relay units.

[0070] Specifically, the bus detection module may include a first switch associated with the bus tie switch on the power supply bus or a second switch associated with the bus tie fuse on the power supply bus. Whether it is a switch associated with the bus tie switch or a switch associated with the bus tie fuse, it can control whether the relay in the relay control module is energized.

[0071] As an optional implementation, the bus detection module includes: a first switch associated with a bus tie switch on the power supply bus, the power supply bus being connected to a first relay and a second relay via the first switch; when the bus tie switch is closed, the first switch is open, and the power supply bus de-energizes the first relay and the second relay; when the bus tie switch is open, the first switch is closed, and the power supply bus energizes the first relay and the second relay.

[0072] Specifically, the first switch, associated with the bus tie switch on the power supply bus, controls the connection between the power supply bus and the relay control module (i.e., the first and second relays). When the bus tie switch is closed (i.e., in normal power supply mode), the first switch is designed to be open, meaning the power supply bus does not supply power to the relay control module, keeping the relays de-energized. Conversely, when the bus tie switch is open (i.e., in power interruption or maintenance mode), the first switch closes, ensuring the power supply bus can provide power to the relay control module and triggering the closed-loop switching of the communication link.

[0073] As an optional implementation, the bus detection module includes: a second switch associated with a bus tie fuse on the power supply bus, the power supply bus being connected to a first relay and a second relay via the second switch; when the bus tie fuse is connected, the second switch is disconnected, and the power supply bus de-energizes the first relay and the second relay; when the bus tie fuse is blown, the second switch is closed, and the power supply bus supplies power to the first relay and the second relay.

[0074] Specifically, the second switch is also designed to control the connection between the power supply bus and the relay control module, but its working principle is slightly different from that of the first switch. When the bus tie fuse is connected (i.e., the power supply is normal), the second switch is open, and the power supply bus does not supply power to the relay. However, when the bus tie fuse blows (i.e., the power supply is abnormal), the second switch closes, the power supply bus begins to supply power to the relay, activating its internal circuitry and causing the communication link to switch to a closed-loop state.

[0075] As an optional implementation, the busbar detection module includes: a first switch associated with a bus tie switch on the power supply busbar and a second switch associated with a bus tie fuse on the power supply busbar. The power supply busbar is connected to a first relay and a second relay via the first and second switches connected in parallel. When the bus tie switch is closed, the first switch is open; when the bus tie switch is open, the first switch is closed; when the bus tie fuse is connected, the second switch is open; when the bus tie fuse blows, the second switch is closed; when both the first and second switches are open, the power supply busbar de-energizes the first and second relays; when the first switch and / or the second switch is closed, the power supply busbar supplies power to the first and second relays.

[0076] Furthermore, to increase system reliability, the busbar detection module can simultaneously include a first switch associated with the bus tie switch and a second switch associated with the bus tie fuse, both connected in parallel between the power supply busbar and the relay control module, such as... Figure 8As shown. Under normal power supply conditions, i.e., the bus tie switch is closed and the bus tie fuse is connected, both the first and second switches remain open to prevent relay mis-triggering. However, when the power supply bus status changes, whether due to the bus tie switch opening or the bus tie fuse blowing, one of the first or second switches will close, allowing the power supply bus to supply power to the relay, triggering the switching of the communication link and ensuring stable communication between devices. In practical use, we can build a normally closed signal contact into the bus tie switch and a normally open signal contact into the bus tie fuse, then connect them in parallel. Afterwards, by connecting the power supply in series with the relay, the relay coil is controlled to close when either the bus tie switch or the bus tie fuse is open.

[0077] By using the parallel design of the first and second switches, even if one component of the bus tie switch or bus tie fuse fails, the bus detection module can still ensure power supply to the relay, thus avoiding the overall failure of the communication link switching control circuit and enhancing the redundancy and resilience of the system in the face of single-point failures. The design of the first and second switches enables immediate response to changes in the power supply bus status, eliminating the need for complex fault detection and handling procedures, significantly shortening the system's response time and improving fault handling efficiency. Compared to traditional complex circuit designs, the simple parallel design of the first and second switches effectively simplifies the structure of the bus detection module, reduces the difficulty of design and implementation, and also reduces system maintenance costs.

[0078] The aforementioned circuit enables parallel communication via two communication links when the power supply bus is closed. This not only improves data transmission rates but also effectively alleviates the pressure on the main link through link redundancy, optimizing communication resource allocation. When the power supply bus is disconnected due to maintenance, fault, or switching operations, the bus detection module quickly detects this change and immediately triggers the communication link switching module to disconnect the original communication link between the two devices. Simultaneously, this module controls the first and second devices respectively, connecting their respective communication interfaces in a closed loop to form an independent and complete communication circuit. This ensures that even in the extreme case of a disconnected power supply bus, the devices maintain stable internal communication, unaffected by external factors. This solves the technical problem of communication anomalies caused by communication link switching when switching operating modes in a 2N power supply architecture.

[0079] Example 2

[0080] According to another aspect of the embodiments of this application, a data center management system is also provided, such as... Figure 9 As shown, the system includes at least: a first device 91 and a second device 92 based on a 2N power supply architecture, which are master and slave to each other, and a communication link switching control circuit 93.

[0081] The 2N power supply architecture, also known as dual redundancy or dual-bus system, is the most widely used power redundancy configuration in facilities such as data centers and AI computing centers. Its core design goal is to provide uninterrupted power supply, ensuring continuous operation of IT loads even if one power system fails, thus greatly improving the availability and reliability of the data center. In the 2N architecture, "N" represents the minimum power capacity required for normal data center operation. This means that under a 2N architecture, the data center is actually configured with two independent power systems, each with a capacity of N, which is twice the minimum power capacity required for normal data center operation. These two power systems are completely independent, including independent power inputs, conversion equipment, power distribution systems, and cabling, ensuring that if one system fails, the other can seamlessly take over and continue to provide power to the IT load. To achieve redundant switching between the two systems, the 2N architecture is typically equipped with automatic transfer switches and other control devices that can automatically switch to the backup power system when a primary power system failure is detected, without any interruption for users or IT loads.

[0082] Specifically, the equipment types of the first and second devices include, but are not limited to, one of the following: power supply equipment, server equipment, network equipment, monitoring equipment, and storage equipment.

[0083] Power supply equipment, such as uninterruptible power supplies (UPS), provides a stable power supply to support the operation of servers and other equipment within the data center. In a 2N architecture, each power supply device has redundant backups, ensuring that a single power supply failure will not affect the continuous operation of the data center.

[0084] Server equipment: The computing core of a data center, handling massive data processing and storage tasks. In a 2N architecture, server equipment can obtain uninterrupted power support through redundant power lines, improving the stability and security of data processing.

[0085] Network devices, such as switches and routers, are responsible for the efficient transmission of data within the network. Employing a 2N architecture, these network devices also have redundant power supplies and communication links, ensuring smooth data transmission even if some lines fail.

[0086] Monitoring equipment includes environmental monitoring sensors and equipment operation status monitoring modules, which monitor key indicators such as temperature, humidity, and equipment operating parameters in the data center in real time to ensure optimal operating conditions. The monitoring equipment utilizes a 2N architecture to maintain the timeliness and accuracy of monitoring information even during maintenance or failures.

[0087] Storage devices: Data warehouses in data centers, used to store important data long-term. Storage devices in a 2N architecture not only improve data security and integrity, but also ensure the stability and speed of data reading and writing processes through efficient communication link switching control.

[0088] By using a data center management system based on a 2N power supply architecture, not only is the switching control of communication links between devices optimized, but the overall operating efficiency and user experience of the data center are also improved.

[0089] The aforementioned communication link switching control circuit includes: a bus detection module and a communication link switching module. The bus detection module can detect the connection status of the power supply bus between the first device and the second device based on a 2N power supply architecture. The communication link switching module is connected to the bus detection module and can control the first device and the second device to communicate through two communication links when the power supply bus is normally connected. When the power supply bus is disconnected, the connection of the two communication links is disconnected, and the closed-loop connection of the communication interfaces of the first device and the second device is controlled respectively.

[0090] When the busbar detection module includes both a bus tie switch and a fuse, and both the bus tie switch and the fuse are in the closed state, the first device and the second device are considered to be part of the same communication network. Through the switching module in the control circuit, the communication link between the devices is optimized to achieve the best communication effect and data transmission efficiency.

[0091] Conversely, if any bus tie device is disconnected, the bus detection module will immediately detect this change, such as during maintenance or in the event of a fault, and transmit a signal to the communication link switching module. This module then executes the command to disconnect the previously connected communication link, activating the closed-loop connection mechanism to ensure that each device's communication interface is connected only to itself, forming an independent communication link. Simultaneously, by connecting a resistor of a specific value (e.g., 120Ω) at the end of the link, the impedance matching of the communication link is further optimized, preventing signal reflection and interference, and ensuring the stability and integrity of data transmission.

[0092] As can be seen, the communication link switching control circuit is a key component to ensure the quality of communication between devices. The following describes the functions of each module of the communication link switching control circuit in the above data center management system in conjunction with the specific implementation process.

[0093] As an optional implementation, the first device includes a first communication interface and a second communication interface, and the second device includes a third communication interface and a fourth communication interface; the communication link switching module includes a relay control module and an impedance matching module, and the impedance matching module includes a first resistor and a second resistor; the relay control module is used to control the connection of the first communication interface and the third communication interface, and the connection of the second communication interface and the fourth communication interface when the power supply bus is normally connected; and to control the connection of the first communication interface via the first resistor and the second communication interface, and the connection of the third communication interface via the second resistor and the fourth communication interface when the power supply bus is disconnected.

[0094] As an optional implementation, the relay control module includes a first relay and a second relay. The first relay includes a first common contact, a first normally open contact, and a first normally closed contact. The second relay includes a second common contact, a second normally open contact, and a second normally closed contact. The first common contact is connected to a second communication interface. The first normally open contact is connected to a first end of a first resistor. The first normally closed contact is connected to a fourth communication interface. The second end of the first resistor is connected to the first communication interface. The second common contact is connected to a third communication interface. The second normally open contact is connected to a first end of the second resistor. The second normally closed contact is connected to the first communication interface. The second end of the second resistor is connected to the fourth communication interface. A busbar detection module is used to de-energize the first and second relays when the power supply busbar is normally connected, and to energize the first and second relays when the power supply busbar is disconnected.

[0095] As an optional implementation, communication between the first and third communication interfaces, and between the second and fourth communication interfaces, is based on the RS485 protocol.

[0096] As an optional implementation, the first device includes a first communication interface and a second communication interface, and the second device includes a third communication interface and a fourth communication interface, with the third communication interface connected to the fourth communication interface via a third resistor; the communication link switching module includes a relay control module and an impedance matching module, with the impedance matching module including a fourth resistor; the relay control module is used to control the connection between the first and third communication interfaces and the connection between the second and fourth communication interfaces when the power supply bus is normally connected; and to control the connection between the first and second communication interfaces via the fourth resistor and the connection between the third and fourth communication interfaces when the power supply bus is disconnected.

[0097] As an optional implementation, the relay control module includes a first relay and a second relay. The first relay includes a first common contact, a first normally open contact, and a first normally closed contact. The second relay includes a second common contact and a second normally closed contact. The first common contact is connected to a second communication interface. The first normally open contact is connected to a first end of a fourth resistor. The first normally closed contact is connected to the fourth communication interface. The second end of the fourth resistor is connected to the first communication interface. The second common contact is connected to a third communication interface. The second normally closed contact is connected to the first communication interface. The first end of the third resistor is connected to the third communication interface. The second end of the third resistor is connected to the fourth communication interface. A busbar detection module is used to de-energize the first and second relays when the power supply busbar is normally connected, and to energize the first and second relays when the power supply busbar is disconnected.

[0098] As an optional implementation, communication between the first and third communication interfaces, and between the second and fourth communication interfaces, is based on the CAN protocol.

[0099] As an optional implementation, the bus detection module includes: a first switch associated with a bus tie switch on the power supply bus, the power supply bus being connected to a first relay and a second relay via the first switch; when the bus tie switch is closed, the first switch is open, and the power supply bus de-energizes the first relay and the second relay; when the bus tie switch is open, the first switch is closed, and the power supply bus energizes the first relay and the second relay.

[0100] As an optional implementation, the bus detection module includes: a second switch associated with a bus tie fuse on the power supply bus, the power supply bus being connected to a first relay and a second relay via the second switch; when the bus tie fuse is connected, the second switch is disconnected, and the power supply bus de-energizes the first relay and the second relay; when the bus tie fuse is blown, the second switch is closed, and the power supply bus supplies power to the first relay and the second relay.

[0101] As an optional implementation, the busbar detection module includes: a first switch associated with a bus tie switch on the power supply busbar and a second switch associated with a bus tie fuse on the power supply busbar. The power supply busbar is connected to a first relay and a second relay via the first and second switches connected in parallel. When the bus tie switch is closed, the first switch is open; when the bus tie switch is open, the first switch is closed; when the bus tie fuse is connected, the second switch is open; when the bus tie fuse blows, the second switch is closed; when both the first and second switches are open, the power supply busbar de-energizes the first and second relays; when the first switch and / or the second switch is closed, the power supply busbar supplies power to the first and second relays.

[0102] It should be noted that the communication link switching control circuit in this application embodiment has been described in detail in embodiment 1. Some details not shown in this embodiment can be referred to embodiment 1, and will not be repeated here.

[0103] The sequence numbers of the above embodiments are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0104] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0105] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual couplings, direct couplings, or communication connections may be through some interfaces; indirect couplings or communication connections between units or modules may be electrical or other forms.

[0106] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0107] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0108] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, read-only memory (ROM), random access memory (RAM), portable hard drive, magnetic disk, or optical disk.

[0109] The above are merely preferred embodiments of this application. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A communication link switching control circuit, characterized in that, include: Busbar detection module and communication link switching module, among which, The bus detection module is used to detect the connection status of the power supply bus between the first and second devices based on the 2N power supply architecture. The communication link switching module is connected to the bus detection module and is used to control the first device and the second device to communicate through two communication links when the power supply bus is normally connected; when the power supply bus is disconnected, the connection of the two communication links is disconnected, and the communication interfaces of the first device and the second device are respectively controlled to close the loop connection.

2. The circuit according to claim 1, characterized in that, The first device includes a first communication interface and a second communication interface, and the second device includes a third communication interface and a fourth communication interface; The communication link switching module includes a relay control module and an impedance matching module, wherein the impedance matching module includes a first resistor and a second resistor. The relay control module is used to control the connection between the first communication interface and the third communication interface, and the connection between the second communication interface and the fourth communication interface when the power supply bus is normally connected; and to control the connection between the first communication interface and the second communication interface via the first resistor, and the connection between the third communication interface and the fourth communication interface via the second resistor when the power supply bus is disconnected.

3. The circuit according to claim 2, characterized in that, The relay control module includes a first relay and a second relay. The first relay includes a first common contact, a first normally open contact, and a first normally closed contact. The second relay includes a second common contact, a second normally open contact, and a second normally closed contact. The first common contact is connected to the second communication interface, the first normally open contact is connected to the first end of the first resistor, the first normally closed contact is connected to the fourth communication interface, the second end of the first resistor is connected to the first communication interface, the second common contact is connected to the third communication interface, the second normally open contact is connected to the first end of the second resistor, the second normally closed contact is connected to the first communication interface, and the second end of the second resistor is connected to the fourth communication interface. The bus detection module is used to de-energize the first relay and the second relay when the power supply bus is normally connected, and to energize the first relay and the second relay when the power supply bus is disconnected.

4. The circuit according to claim 2, characterized in that, The communication between the first communication interface and the third communication interface, and between the second communication interface and the fourth communication interface, are based on the RS485 protocol.

5. The circuit according to claim 1, characterized in that, The first device includes a first communication interface and a second communication interface, and the second device includes a third communication interface and a fourth communication interface, wherein the third communication interface is connected to the fourth communication interface via a third resistor; The communication link switching module includes: a relay control module and an impedance matching module, wherein the impedance matching module includes: a fourth resistor; The relay control module is used to control the connection between the first communication interface and the third communication interface, and the connection between the second communication interface and the fourth communication interface when the power supply bus is normally connected; and to control the connection between the first communication interface and the second communication interface via the fourth resistor, and the connection between the third communication interface and the fourth communication interface via the third resistor when the power supply bus is disconnected.

6. The circuit according to claim 5, characterized in that, The relay control module includes a first relay and a second relay. The first relay includes a first common contact, a first normally open contact, and a first normally closed contact. The second relay includes a second common contact and a second normally closed contact. The first common contact is connected to the second communication interface, the first normally open contact is connected to the first end of the fourth resistor, the first normally closed contact is connected to the fourth communication interface, the second end of the fourth resistor is connected to the first communication interface, the second common contact is connected to the third communication interface, the second normally closed contact is connected to the first communication interface, the first end of the third resistor is connected to the third communication interface, and the second end of the third resistor is connected to the fourth communication interface. The bus detection module is used to de-energize the first relay and the second relay when the power supply bus is normally connected, and to energize the first relay and the second relay when the power supply bus is disconnected.

7. The circuit according to claim 5, characterized in that, The communication between the first communication interface and the third communication interface, and between the second communication interface and the fourth communication interface, are based on the Controller Area Network Bus (CAN) protocol.

8. The circuit according to claim 3 or 6, characterized in that, The bus detection module includes: a first switch associated with the bus tie switch on the power supply bus, wherein the power supply bus is connected to the first relay and the second relay via the first switch; When the bus tie switch is closed, the first switch is open, and the power supply bus disconnects power to the first relay and the second relay. When the bus tie switch is open, the first switch is closed, and the power supply bus supplies power to the first relay and the second relay.

9. The circuit according to claim 3 or 6, characterized in that, The bus detection module includes: a second switch associated with the bus tie fuse on the power supply bus, and the power supply bus is connected to the first relay and the second relay via the second switch; When the bus tie fuse is connected, the second switch is disconnected, and the power supply bus disconnects power to the first relay and the second relay. When the bus tie fuse blows, the second switch is closed, and the power supply bus supplies power to the first relay and the second relay.

10. The circuit according to claim 3 or 6, characterized in that, The bus detection module includes: a first switch associated with a bus tie switch on the power supply bus and a second switch associated with a bus tie fuse on the power supply bus, wherein the power supply bus is connected to a first relay and a second relay respectively via the first switch and the second switch connected in parallel; When the bus tie switch is closed, the first switch is open; when the bus tie switch is open, the first switch is closed; when the bus tie fuse is connected, the second switch is open; when the bus tie fuse blows, the second switch is closed; when both the first and second switches are open, the power supply bus disconnects power to the first and second relays; when the first and / or second switches are closed, the power supply bus supplies power to the first and second relays.

11. A data center management system, characterized in that, include: The first and second devices based on a 2N power supply architecture, which are mutually master and slave, and the communication link switching control circuit according to any one of claims 1 to 10.

12. The system according to claim 11, characterized in that, The equipment types of the first device and the second device include one of the following: power supply equipment, server equipment, network equipment, monitoring equipment, and storage equipment.

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