feed-in module

Abstract

Power supply module (16) for mounting on a mounting rail (10), - with a housing (38) which has a fastening device (40) for direct mounting on the mounting rail (10), and which has a contact area (52) with a first contact (54) and a further contact area (42) with a first further contact (44) and with a second further contact (46), - with a lever (62) pivotably mounted on the housing (38), which has a first counter contact (54), wherein by pivoting the lever (62) the first counter contact (64) can be brought into electrical contact with the first contact (54), - wherein the first contact (54) is electrically directly connected to the first further contact (44), - wherein the housing (38) has a power input (30) and a control input (32), - wherein the current input (30) is connected to the second further contact (46) via a switching unit (82), and - wherein the switching unit (82) is actuated depending on a signal applied to the control input (32).

Description

[0001] The invention relates to a power supply module for mounting on a mounting rail. Furthermore, the invention relates to a power distribution system and a system, each comprising such a power supply module. The system is preferably an industrial plant.

[0002] Systems, such as industrial plants, typically have one or more actuators that perform a task. In an industrial plant, for example, an actuator is used to create and / or process a workpiece. The actuator is usually powered by a central power distribution unit, which is typically mounted on a DIN rail in a control cabinet. A power supply unit for the distribution unit is connected to a main power line, and several sub-circuits branch off from it. Each of these sub-circuits is usually protected by a suitable protective device, such as a circuit breaker. By actuating the circuit breaker, it is possible to shut down the respective sub-circuit or at least interrupt its power supply.To simplify the installation of circuit breakers, the power distribution unit typically includes a number of connection modules into which the respective circuit breaker can be plugged. During manufacturing, the connection modules are mechanically and electrically linked to one another, ensuring that the same number of modules is always present, regardless of the actual number of sub-circuits. To increase flexibility, an alternative design uses individual components of the switching unit as modular devices that can be mounted individually on the DIN rail. For electrical connection, the devices must be connected to each other using appropriate cables, which must be connected to the corresponding terminals on the devices. During installation, it is essential that none of the terminals or cables are reversed, which complicates the process.

[0003] From DE 10 2015 218 108 B4 and DE 20 2015 009 391 U1, switching devices are known in which the electrical and mechanical connection between them is effected by means of a corresponding lever which is pivotably mounted on the housing of each of the switching devices.

[0004] A supply line typically runs from each circuit breaker to its respective actuator, forming a dedicated circuit. To ensure each actuator operates according to its intended function, a control unit is provided to regulate the current flow to the actuator. In the simplest case, this is a switch that is operated by the control unit. The switch turns the actuator on and off. For this purpose, the switch is integrated into the actuator's electrical supply line.

[0005] If the actuator performs functions that could endanger other machines and / or operating personnel, functional safety must be ensured. In an emergency, the actuator's intended function should be stopped, and a safe state should be established. Depending on the desired safety level, potential system failures must be considered. This usually includes the possibility of individual system components failing, such as the switch. Therefore, it is necessary to install an additional switch in the power supply line, also operated by the control system, which serves as a fallback solution.

[0006] Thus, the circuit breaker for the electrical distribution system comprises a total of three separate components to achieve the desired level of safety. These components must be interconnected accordingly, which increases installation time. A comparatively large number of different wires / cables are also required, thus increasing manufacturing costs. Furthermore, the individual components must be matched to the intended application.

[0007] The invention is based on the objective of specifying a particularly suitable feed-in module, a particularly suitable power distribution system, and a particularly suitable system, advantageously simplifying assembly and / or increasing safety.

[0008] With regard to the feed-in module, this problem is solved according to the invention by the features of claim 1, with regard to the power distribution by the features of claim 8, and with regard to the system by the features of claim 9. Advantageous further developments and embodiments are the subject of the respective dependent claims.

[0009] The power supply module is, for example, a component of a power distribution system. The power distribution system itself is ideally a component of an industrial plant, a residential power supply, a boat, or any other motor vehicle, particularly one that is moored to land. At the very least, the power distribution system is suitable for operation in each of these locations. Ideally, the power distribution system is suitable for connection to a main power line.

[0010] The power supply module is suitable and designed for mounting on a DIN rail. The module comprises a housing with a mounting device for direct attachment to the DIN rail. The DIN rail can be, for example, a top-hat rail or a G-rail. For mounting, the housing can simply be placed onto the DIN rail, simplifying installation. Alternatively, it can be clamped to the DIN rail. For this purpose, the mounting device includes a suitable fastening element, such as a screw, which is actuated to create a positive fit against the DIN rail. Alternatively, the fastening element can be a snap-in arm or similar device that engages in a corresponding recess or receptacle in the DIN rail.Preferably, the mounting device comprises at least one U-shaped section by which, in the mounted state, at least part of the mounting rail is gripped. The grip is stabilized by means of the optional fastening element, such as the screw or the snap arm, so that the housing cannot detach from the mounting rail without first actuating the fastening element. Thus, the position of the housing, and therefore also of the power supply, is stabilized, and consequently, safety is increased.

[0011] The housing incorporates a contact area comprising a first contact. The housing also includes a further contact area comprising a first additional contact and a second additional contact. For example, the additional contacts and the first contact, and / or at least the second first contact and the second additional contact, are identical in construction, allowing the use of identical parts during manufacturing and thus reducing production costs. Preferably, the contact area and the additional contact area are identical in construction or at least mirror images of each other, further simplifying manufacturing.

[0012] The first contact is electrically connected directly to the first subsequent contact. Therefore, during operation, the same electrical potential is present at the first contact as at the first subsequent contact, making it possible to pass an electrical potential through the power supply module and thus provide a corresponding electrical supply voltage. Alternatively, signal transmission via the first contacts is possible without interference.

[0013] Furthermore, the feed-in module has a lever that is pivotally mounted on the housing about a pivot axis. Specifically, the lever is mounted to the housing at one of its ends so that it can be folded away from the housing. Advantageously, the lever's path is essentially perpendicular to the mounting rail, and the pivot axis is preferably parallel to the mounting rail, which simplifies operation. The lever is suitable, and in particular designed and configured, for manual operation.

[0014] For this purpose, the lever has a suitable shape, for example a corresponding projection.

[0015] The lever comprises a first mating contact and, for example, an identical second mating contact, which are expediently connected to a support of the lever. The support is suitably made of a plastic or similar material and is preferably electrically non-conductive. The support is preferably connected to the housing. This makes it possible to manufacture the support with a comparatively high degree of robustness, with the first mating contact and any further mating contacts being made of an electrically conductive or conductive material, preferably sheet metal. This simplifies manufacturing.

[0016] By pivoting the lever, it is possible to bring the first mating contact into electrical contact with the first contact. In this state, the first mating contact preferably rests directly against the first contact, preferably both mechanically directly. Thus, it is possible to assume a position by means of the lever in which electrical contact is present. In this position, any support is advantageously resting against the housing or is at least flush with it. By pivoting the lever from this position, the first contact and the first mating contact, as well as any further contacts and mating contacts, are preferably separated from each other and, in particular, are no longer in direct mechanical contact with each other. It is suitably possible to create a comparatively large distance between the first mating contact and the first contact, for example, more than 5 mm or 1 cm.Thus, the lever has at least two different positions, one of which involves electrical contact and the other an electrical isolation of the first contact from the first counter-contact.

[0017] The lever allows the feed-in module to be connected to other devices, particularly power distribution equipment. For example, pivoting the lever also activates the mounting device, creating an electrical connection between the devices and a mechanical connection to the mounting rail. This simplifies installation.

[0018] The housing further comprises a current input, which is preferably not part of the contact area or the wider contact area and is spaced apart from them. The housing also includes a control input, which is likewise not part of the contact area or the wider contact area and is preferably spaced apart from them. It is suitably possible to connect a cable or line to each of the two inputs, i.e., the current input and the control input. The two inputs are preferably designed and configured for this purpose. For example, each input has a corresponding terminal or socket. The two inputs are preferably spaced apart from each other so that mutual interference of the electrical potential and / or signals applied to the two inputs is prevented.

[0019] Furthermore, the power supply module has a switching unit, which is expediently located inside the housing, thus protecting it. The switching unit is designed to be controllable and expediently includes a control contact, the electrical conductivity of which is set depending on the electrical potential applied to the control contact. In other words, the switching unit is actuated by applying an electrical potential to the control contact. The current input is connected to the second contact via the switching unit. The switching unit thus makes it possible to adjust the electrical connection between the current input and the second contact, so that current can only flow from the current input to the second contact when the switching unit is actuated.Opening the switching unit electrically isolates the power input and the second contact, allowing different electrical potentials to exist between them. The switching unit itself is actuated by a signal present at the control input. Specifically, the power supply module is operated using a corresponding method.

[0020] The feed-in module provides an electrical voltage to the additional contact area, which is applied between the two further contacts. This voltage is determined partly by the electrical potential at the first contact and partly by the electrical potential at the current input. By actuating the switching unit, it is possible to adjust the electrical voltage applied to the two further contacts, thus controlling the power supply to other devices, in particular a power distribution module connected to the additional contact area. When the switching unit is opened, the connected device, for example the module, is no longer powered and is therefore completely deactivated.This makes it possible to cut off the power supply to all devices / modules connected to the extended contact area by applying a signal to the control input, thus shutting them down. Consequently, it is not necessary to control each module individually; simply applying the signal to the control input is sufficient. Therefore, only a relatively small number of wires are required, simplifying wiring and installation. This method also ensures that all devices / modules connected to the extended contact area are reliably shut down, regardless of any malfunctions. This also increases safety.

[0021] Preferably, the power input and the control input are located on the opposite side of the housing from the mounting device. This allows for the connection of corresponding cables to the respective inputs even after the power supply module has been mounted on the DIN rail. The power supply module is particularly preferably designed as a modular device, with additional devices being electrically connected to it by means of a lever or a corresponding lever. Advantageously, the device / module electrically connected to the additional contact area also has a suitable lever, and / or the device / module connected to the contact area has a corresponding additional contact area, which is preferably identical in design to the additional contact area of ​​the power supply module.In an alternative design, the lever is assigned to the further contact area, and the further contacts are electrically contacted by means of the lever.

[0022] For example, the control contact is electrically directly connected to the control input. The electrical potential present at the control input is thus preferably used as the signal to actuate the switching unit. This provides a comparatively simple and therefore robust power supply module. However, a control unit is particularly preferably arranged in the housing, by means of which the switching unit is actuated. Here, the control contact of the switching unit is preferably electrically directly connected to the control unit. The control unit itself is, for example, designed as an application-specific integrated circuit (ASIC) or includes one. The control unit particularly preferably includes a microprocessor, which is especially programmable.The control unit itself is connected to the control input via signal technology, so that any signals present at the control input are read by the control unit and processed during operation. Depending on the respective signal, the switching unit is actuated, and this is expediently matched to the specific switching unit used. The signals present at the control input are independent of the design of the switching unit and thus the power supply module, which simplifies installation in a power distribution system or similar. No knowledge of the internal structure of the power supply module is required to apply the electrical potential to the second contact. The evaluation of the signal present at the control input is performed by the control unit, which then appropriately controls the switching unit.For example, the control input is connected to a bus system, through which specific messages are transmitted, corresponding to the signal. Furthermore, it is possible to send messages via the control input using the control unit, thereby providing feedback on the state of the switching unit and / or whether the switching unit has been actuated.

[0023] Functional safety is preferably provided by means of the power supply module, and the control unit is suitable, specifically designed and configured for this purpose. In particular, the control unit reads the signals provided at the control input, whereby the signals expediently relate to safe functions, i.e., safety functions, as defined in EN IEC 61800-5-2:2007 or DIN EN 61800-5-2. These include, in particular, STO ("Safe torque off"), SS1 ("Safe stop 1"), SS2 ("Safe stop 2"), SOS ("Safe operation stop"), SLS ("Safely limited speed"), SSM ("Safe speed monitor"), SSR ("Safe speed range"), SLP ("Safe limited position"), SP ("Safe position"), SDI ("Safe direction"), and SBC / SBT ("Safe brake control, Safe brake test"). The safe functions relate in particular to any device / module connected to the further contact area or to a component connected thereto.Preferably, the control unit has a dual design, meaning it comprises two separate functional units that perform the same functions, specifically controlling the switch unit and reading the signals present at the control input. These functional units are preferably constructed differently or at least consist of different individual components, which further enhances safety. In summary, the power supply module thus provides functional safety and expediently possesses a specific safety level. Ideally, the power supply module meets the requirements of a specific safety level.

[0024] The contact area suitably has a second contact, and the lever has a second mating contact, wherein the second mating contact can be brought into electrical contact with the second contact by pivoting the lever. If the second mating contact is electrically connected to the second contact, the first contact is preferably also electrically connected to the first mating contact. The second contact is electrically isolated from the second further contact, suitably the entire further contact area, preferably galvanically. In particular, the control unit is electrically connected to the first contact and the second contact. Thus, operation of the control unit is also possible when the switching unit is open, i.e., when no electrical potential is present at the second further contact.Consequently, it is also possible to use the control unit to output feedback via the control input as to whether the switching unit has been actuated, and thus whether there is no electrical potential at the second contact, and / or, for example, whether an electrical cable connected to the power input has been disconnected. Alternatively, the control unit can be electrically connected to the power input, so that the control unit is conveniently powered via the first contact as well as via the power input.

[0025] Alternatively, or particularly preferably in combination with this, the power supply module includes a sensor by means of which the switching unit is monitored. The sensor is preferably energized by the control unit, or at least by means of the second and first contacts, so that the sensor can also operate when the switching unit is open. For example, the sensor is connected to or integrated into the switching unit. The sensor is advantageously used to monitor the switching state of the switching unit. Thus, it is possible to read the sensor by means of the control unit and to draw conclusions about the electrical potential currently present at the second contact. Consequently, a malfunction of the switching unit can also be detected.Alternatively, or preferably in combination with this, an electrical current is detected by means of the sensor or another sensor, which is carried between the switching unit and the second additional contact via a suitable line. Alternatively, the sensor / additional sensor is used to check for an electrical voltage present between the second additional contact and the switching unit or between the second additional contact and the current input. From this, it can be deduced whether the device / module contacted by the additional contact area is currently being energized via the additional contact area. In a further alternative, the control unit is not present, and the sensor is connected, for example, via another input of the housing, whereby the sensor data acquired by the sensor can be read out via the input.

[0026] For example, the contact area has a third contact, and the further contact area has a third additional contact, which are interconnected for signaling purposes. The lever has a third mating contact, whereby the third mating contact can be brought into signaling contact with the third contact by pivoting the lever. In particular, the signaling contact is made by means of an electrical connection, and the third mating contact is thus preferably electrically connected directly to the third contact at a certain position of the lever. Thus, it is possible not only to provide an electrical voltage via the contact area and the further contact area, but also to exchange signals via this contact area. Preferably, the contact area has a fourth contact, and the further contact area has a fourth additional contact, which are also interconnected for signaling purposes.The lever preferably includes a corresponding fourth contact, which can be connected to the fourth contact for signal transmission. This simplifies and improves data exchange via the contact areas. Data exchange between individual devices / modules of the power distribution system is thus possible via these contact areas. In particular, the control unit is present, which is expediently connected to the third and the optional fourth contact for signal transmission. A bus system is at least partially formed by means of the third and fourth contacts, and the control unit is preferably configured as a slave of this bus system. The bus system suitably conforms to an IO-Link, Profinet, or EtherCAT standard.

[0027] For example, the switching unit comprises only a single switching element. Preferably, however, the switching unit comprises at least two switching elements connected in series. In this way, if one of the switching elements fails, it is still possible to disconnect the current input from the second contact using the other switching element, which increases safety. For example, it is possible to actuate the two switching elements separately. Particularly preferably, however, they can only be actuated together, which simplifies control. In this case, the control contact of the switching unit is specifically connected to a corresponding control contact of each of the switching elements.

[0028] For example, the switching unit comprises a thyristor and is preferably formed by means of one. More preferably, however, the switching unit comprises a triac consisting of two thyristors connected in antiparallel to each other. For example, the switching unit is formed by, or preferably comprises, only one or two triacs connected in series. Thus, the switching unit is at least partially constructed using semiconductor switches. In a further embodiment, the switching unit comprises, for example, a field-effect transistor, in particular a MOSFET, a GTO, or an IGBT, advantageously several of each, wherein the semiconductor switches are preferably connected electrically in series with each other. As a result, the formation of an arc when the switching unit is switched off is avoided, which increases safety. Alternatively, the switching unit comprises, for example, a relay having two control contacts.Depending on the electric current passed through the control contacts, the switching unit is actuated, i.e., it is switched to an electrically conductive or non-conductive state. The relay thus provides galvanic isolation between the control input and the second contact. In another alternative, the switching unit comprises a relay and at least one semiconductor switch, for example, a triac or preferably several triacs. To actuate the switching unit, the semiconductor switch is actuated first, followed by the relay, particularly to open the switching unit. To close the switching unit, the relay is actuated first, followed by the semiconductor switch. Consequently, the formation of an arc during actuation of the switching unit is prevented.

[0029] Power distribution is, for example, a component of a system such as an industrial plant. The power distribution system includes a mounting rail, such as a DIN rail or G-rail. A feed-in module is attached to the mounting rail. This module comprises a housing with a mounting device. The mounting device is attached directly to the mounting rail. The housing of the feed-in module further includes a contact area with a first contact and another contact area with a second contact. The feed-in module also has a lever pivotally mounted on the housing, which has a first mating contact. By pivoting the lever, the first mating contact can be brought into electrical contact with the first contact. The first contact is electrically directly connected to the first mating contact, and the housing has a power input and a control input.The power input is connected to the second contact via a switching unit, whereby the switching unit is actuated depending on a signal present at the control input.

[0030] The power distribution unit further comprises an additional feed-in module, a module, and another module, each containing a housing with a mounting device. Using their respective mounting devices, the feed-in module, the module, and the additional module are placed on and secured to the mounting rail. The additional module is positioned between the two feed-in modules and is in direct mechanical contact with them. The feed-in module is positioned between the two modules, i.e., the module and the additional module, and is in direct contact with them. The modules and the feed-in modules are advantageously designed as bayable devices, thus providing a comparatively compact power distribution unit.

[0031] The housing of each module, as well as the additional power supply module, each has an additional contact area, each comprising a first additional contact and a second additional contact. In particular, the additional contact areas are identical in construction to each other and to the additional contact area of ​​the power supply module. Both modules also have a contact area with a first contact and a second contact, wherein the contact areas are expediently identical in construction to each other and preferably identical in construction to the contact area of ​​the power supply module. Preferably, the first contact and the first additional contact of each module are directly electrically connected to each other, and / or the second contact and the second additional contact of each module are directly electrically connected to each other. Thus, the electrical voltage applied to the contacts of the respective contact area is passed through the modules to the additional contact area.

[0032] Furthermore, each of the two modules has a lever pivotally mounted on its respective housing, featuring a first and a second mating contact. The levers of the modules are suitably identical in design to the lever of the power supply module. By pivoting the lever of each module, it is possible to bring the respective mating contacts into electrical contact with the corresponding contacts of the respective contact area, and also to break the electrical contact by pivoting the lever accordingly.

[0033] The additional contacts of the second feed-in module are electrically connected to the contacts of the second module by means of the lever of the second module. In other words, the first contacts are brought into electrical contact with the contacts of the second feed-in module by pivoting the lever of the second module, for which, among other things, the first mating contact preferably rests directly against the first additional contact of the second feed-in module. For this purpose, the lever of the second module is expediently pivoted in a suitable position. The additional contacts of the second module are electrically connected to the contacts of the feed-in module by means of the lever of the feed-in module. This lever is pivoted in a suitable position for this purpose. In other words, the mating contact of the lever of the feed-in module rests directly against the first additional contact, thus establishing electrical contact.Furthermore, the additional contacts of the power supply module, in particular the first and second additional contacts, are in electrical contact with the module's contacts, i.e., the first and second contacts, by means of the module's lever. For this purpose, the first and second mating contacts of the module's lever are used, which are in electrical contact with the respective contacts / additional contacts and preferably bear directly against them mechanically.

[0034] Preferably, each module, i.e., the module and the subsequent module, has a current output that is electrically connected, for example, to the respective second contact or the second additional contact. This makes it possible to supply a specific actuator / device, or at least a secondary circuit or the like, with electrical energy via the respective module. Preferably, a further component, such as a circuit breaker, is arranged between the second contact / second additional contact and the respective current output. This component provides protection for the respective secondary circuit. Adequately, each module has a control unit by means of which certain functions of the respective module are performed, such as actuating the respective circuit breaker.

[0035] During power distribution, the additional module is powered by the additional power supply module, and this power supply is independent of the signal present at the control input of the power supply module. Conversely, it is possible to switch off the module using the power supply module by actuating the switching unit. In this case, any additional modules connected to the module are also switched off by the power supply module. Consequently, during power distribution, it is possible to switch off specific devices, particularly those connected to the module and other connected modules, by applying a corresponding signal to the control input. However, at least partial operation of other devices connected to the additional module is possible, which occurs independently of the signal present at the control input. This increases flexibility.

[0036] In another embodiment, several such additional modules are arranged between the two feed-in modules and are electrically connected to each other by means of corresponding levers. In this configuration, each additional module supplies a further auxiliary circuit, and the electrical supply is independent of the signal present at the control input of the feed-in module.

[0037] Preferably, each contact area has a third and fourth contact, and the additional contact areas have a third and fourth further contact, which are interconnected for signaling purposes and also interconnected via the levers. Thus, the modules and the power supply modules are interconnected for signaling purposes. In particular, the power supply module and the modules act as slaves to a bus system formed by the third / fourth (additional) contacts, and the additional power supply module acts as the master of the bus system. Preferably, the bus system conforms to the IO-Link, Profinet, or EtherCAT standard.

[0038] The additional power supply module expediently comprises two current inputs, each of which is electrically connected directly or via another component to one of the further contacts of the additional contact area. Thus, the current inputs are used to adjust the electrical voltage applied between the first and second further contacts of the additional contact area. The current inputs are preferably designed to allow the connection of a cable or at least a conductor. In particular, each current input includes a suitable terminal for this purpose.

[0039] The system is, for example, a component of a household or a boat. However, it is particularly preferably a component of an industrial plant used for processing and / or manufacturing a workpiece. The system comprises two power distribution units, providing at least two additional power supply modules. These modules expediently have two power inputs, which are suitably connected to a power supply unit, preferably connected to a main power line. The power supply unit provides a DC voltage and preferably has two terminals between which a voltage of 10 V, 12 V, 20 V, 24 V, or more than 100 V is applied. The voltage is suitably less than 10 kV, 5 kV, or 1 kV. Each of the two terminals is expediently connected to the two power inputs of the additional power supply modules.However, the first and second contacts of the two power supply modules are each assigned to different connections on the power supply unit. Furthermore, each power input of each power supply module is also assigned to a different connection on the power supply unit.

[0040] Furthermore, each of the power supply modules is connected to different terminals of the power supply unit via its respective power input. Preferably, the second contact of each (additional) module is connected to its respective power output. Thus, each power distribution module is assigned a different terminal of the power supply unit.

[0041] The system also includes a control unit, which primarily functions as a process controller and stores various process parameters. This control unit is connected to the two other modules, specifically their power outputs. Thus, the control unit is powered by these two modules. Therefore, the power supply to the control unit is independent of the electrical signals present at the control inputs of the power supply module. Furthermore, the system includes an actuator, which could be an electric motor, such as a rotary or linear motor. Alternatively, the actuator could be a valve. The actuator is electrically connected to the respective modules of the power distribution system, specifically their power outputs, so that the actuator is powered by these modules.Consequently, by applying a corresponding signal to the control inputs of the power supply modules, it is possible to interrupt the power supply to the modules, thus reliably interrupting the power supply to the actuator. The control unit, as the process control system, is not affected, so it continues to function and, in particular, receives power. Therefore, it is possible to use the control unit to check the actuator and, in particular, to provide feedback as to whether the power supply to the actuator has actually been interrupted or whether a malfunction has occurred.

[0042] The actuator is suitably controlled by a control unit, which is preferably connected to the actuator via a signal connection. The control unit preferably controls and / or regulates the electrical energy supplied by the two respective power distribution systems, so that the actuator operates according to specific process parameters.

[0043] In an alternative scenario, for example, only a power distribution module is present, which is specifically assigned to a positive electrical potential of the power supply unit. The negative potential is conveniently connected to ground. Thus, when the power distribution module is deactivated by applying the appropriate signal to the power supply module, the actuator remains connected to ground at least to the electrical potential of the power supply unit.

[0044] During operation, each of the power distribution units typically carries an electric current between 0.5 A and 20 A, between 1 A and 15 A, or between 2 A and 10 A.

[0045] Preferably, the control unit is connected via signal transmission to the control inputs of the power supply module of the respective power distribution units, or at least to the control input of the power supply module of the single power distribution unit. This makes it possible to use the control unit to deactivate the module of the respective power distribution unit and thus also the actuator. In other words, the control unit triggers the respective switching unit, thereby deactivating the modules. Alternatively, or preferably in combination with this, the actuator is connected to the control inputs so that, in the event of a malfunction of the actuator and / or the control unit, a direct shutdown can be performed in an emergency. This further increases safety.

[0046] When a component is referred to as the first, second, third, etc. component, this refers specifically to only one particular component. In particular, this does not mean that a specific number of such components are present.

[0047] The further training and advantages explained in connection with the feed-in module can also be applied analogously to the electricity distribution / system and to each other, and vice versa.

[0048] An embodiment of the invention is explained in more detail below with reference to a drawing. The drawing shows: Fig. 1. Schematically simplified, a system with two power distribution units, Fig. 2 schematically one of the power distributions which has a feed-in module with a switching unit, Fig. 3 the switching unit, and Fig. 4. The power distribution in the future.

[0049] Corresponding parts are marked with the same reference symbols in all figures.

[0050] In Fig. Figure 1 schematically simplifies the representation of plant 2 in the form of an industrial plant. Plant 2 is used to produce and / or process a workpiece (not shown in detail). For this purpose, plant 2 includes an actuator 4, designed as an electric motor, which drives another component, for example, a press. Actuator 4 is controlled by a control unit 6, which represents a process control system and is connected to actuator 4 via a signal transmission system.

[0051] To supply power to both the control unit 6 and the actuator 4, the system 2 comprises two power distribution units 8, which are identical in design and each have a mounting rail 10 to which a further feed-in module 12, a further module 14, a feed-in module 16, and a module 18 are attached. The further feed-in module 12, the further module 14, the feed-in module 16, and the module 18 are designed as connectable devices and are attached to the mounting rail 10 in this order. Thus, the further module 14 is positioned between the two feed-in modules 12 and 16, and the feed-in module 16 is positioned between the two modules 14 and 18 of the respective power distribution unit 8, and these modules are in direct mechanical contact with each other.

[0052] The system 2 further comprises a power supply unit 20, which is connected to a main power line (not shown) and has a first terminal 22 and a second terminal 24. A DC voltage of 24 V is present between the two terminals 22 and 24 during operation. Each additional power supply module 12 has a first current input 26 and a second current input 28. The first current input 26 of the additional power supply module 12 of one power distribution unit 8 is connected directly to the first terminal 22, and the second current input 28 of the same additional power supply module 12 is connected directly to the second terminal 24 and thus electrically contacted with it. In the remaining power distribution unit 8, however, the first current input 26 of the additional power supply module 12 is connected to the second terminal 24, and the second current input 28 of the additional power supply module 12 is connected to the first terminal 22 of the power supply unit 20.

[0053] Each power supply module 16 also has a current input 30, with the two current inputs 30 connected to terminals 22 and 24 of the power supply unit 20. The terminals 22 and 24 assigned to the respective power distribution units 8 are different, and the current input 30 of each power supply module 16 is at the same electrical potential as the second current input 28 of the other power supply module 12 of the same power distribution unit 8. Furthermore, each power supply module 16 has a control input 32, which is connected to the control unit 6 via a further bus system 34. Thus, it is possible to provide a signal at each of the two control inputs 32 using the control unit 6. The other module 14 and the module 18 of each power distribution unit 8 each have a current output 36.The current outputs 36 of the two additional modules 14 are electrically connected to the control unit 6, so that the control unit 6 is powered by means of the two additional modules 14. The actuator 4, on the other hand, is electrically connected to the current outputs 36 of the two modules 18, so that the actuator 4 is powered by means of these.

[0054] In Fig. Figure 2 schematically shows one of the power distribution units 8, which are identical in construction. The additional feed-in module 12, the additional module 14, the feed-in module 16, and the module 18 each have a housing 38 that includes a mounting device 40 for direct attachment to the mounting rail 10. Each housing 38 also includes an additional contact area 42 with a first additional contact 44, a second additional contact 46, a third additional contact 48, and a fourth additional contact 50. The additional contacts 44, 46, 48, and 50 are identical in construction. Furthermore, the additional module 14, the feed-in module 16, and the module 18 each have a contact area 52 that includes a first contact 54, a second contact 56, a third contact 58, and a fourth contact 60.The contact areas 52 and the contacts 54, 56, 58, 60 are identical in construction to each other, and the contact area 52 of the further module 14 points to the further contact area 42 of the further feed-in module 12, the contact area 52 of the feed-in module 16 points to the further contact area 42 of the further module 14, and the contact area 52 of the module 18 points to the further contact area 42 of the feed-in module 16.

[0055] Module 18, the power supply module 16, and the further module 14 each have a lever 62 pivotably mounted on their respective housing 38. These levers are identical in construction and each has a first counter-contact 64, a second counter-contact 66, a third counter-contact 68, and a fourth counter-contact 70. When the levers 62 are appropriately pivoted, and in particular when in contact with their respective housings 38, the first contact 54 of the device 14, 16, 18, which has the lever 62, is connected to the corresponding first further contact 44 of the adjacent further contact area 42 by means of the respective first counter-contact 64. Similarly, the remaining contacts 56, 58, 60 are electrically connected to the corresponding further contacts 46, 48, 50 by means of the remaining mating contacts 66, 68, 70. By pivoting the levers 62, it is possible to release the electrical connection.If, however, the electrical connection is established, the lever 62 also engages mechanically in the respective associated contact area 52 and the further contact area 42, so that the devices 12, 14, 16, 18 – i.e., the further feed-in module 12, the further module 14, the feed-in module 16, and the module 18 – are mechanically connected to each other. Pivoting the lever 62 also actuates the respective mounting device 40, causing it to engage in the mounting rail 10 and attach the respective device 14, 16, 18 to the mounting rail 10.

[0056] The additional power supply module 12 has the first current input 26, which is electrically connected directly to the first additional contact 44 of the additional contact area 42 of the additional power supply module 12. The second current input 28 is electrically connected directly to the second additional contact 46 of the additional contact area 42 of the additional power supply module 12. A control unit 72 of the additional power supply module 12, located within the housing 38, is also connected to the two current inputs 26 and 28. The control unit 72 is further connected, electrically, to the third and fourth additional contacts 48 and 50 of the additional contact area 42. The control unit 72 forms a master of a bus system 74, which also includes all third and fourth contacts 58 and 60, as well as all third and fourth additional contacts 48 and 50.

[0057] Module 14 and module 18 are identical in construction and each has a current output 36, which is electrically connected via a switch 76 to the second contact 46 and the second contact 56 of the respective contact area 42, 52. Thus, the second contact 56 and the second contact 46 of each module 14, 18 are directly electrically connected to each other, as are the first contact 54 and the first contact 44. A control unit 78 of module 14 or module 18 is also connected to these. The control unit 78 is also signal-connected to the third and fourth contacts 58, 60, which are directly connected to the third and fourth contacts 48, 50, respectively. The control units 78 are configured as slaves of the bus system 74.

[0058] The respective switch 76 is actuated by means of the control units 78, in particular depending on an electric current flowing through the switch 76. If this current exceeds a certain limit, the switch 76 is opened, thus preventing current flow from the current output 36 to the respective second contact 56 or second further contact 46. The respective switch 76 is also actuated by means of the control units 78 depending on commands transmitted via the bus system 74. In one embodiment, the switch 76 comprises only a mechanical switch, such as a relay or contactor. In another alternative, the switch 76 comprises a semiconductor switch, such as a MOSFET or IGBT. In a further embodiment, the switch 76 comprises both a mechanical switch and a semiconductor switch.

[0059] In the feed-in module 16, the third contact 48 and the fourth contact 50 are also directly connected to the third contact 58 and fourth contact 60, respectively, which are connected to a control unit 80 that is also configured as a slave of the bus system 74. The control unit 80 is further connected to the control input 32 and is thus also a component of the bus system 34, where it is likewise configured as a slave. The control unit 80 is energized via contact area 52 and is electrically connected to the first contact 54 and the second contact 66 for this purpose. The first additional contact 44 is directly connected to the first contact 56. In contrast, the second contact 56 is galvanically isolated from the second additional contact 46, which is connected to the current input 30 via a switching unit 82.

[0060] Provided the levers 62 are closed and the respective electrical contacts are established, signals can be exchanged between the individual control units 72, 78, 80, and thus between the additional power supply module 12, the additional module 14, the power supply module 16, and the module 18, via the bus system 74. If the switching unit 82 and the switches 76 are closed, current flows from the second current input 28 to the current output 36 of the additional module 14, and current flows from the current input 30 to the current output 36 of the module 18. In this case, both the actuator 4 and the control unit 6 are energized.

[0061] If a short circuit occurs in the control unit 6 or the actuator 4, this is detected by the control units 78 of the further module 14 or module 18, respectively, and the corresponding switch 76 is actuated, thus shutting down the control unit 6 or the actuator 4. If a safe function is triggered, in particular STO (Safe To Off), this is detected by the control unit 6. Consequently, a signal is sent via the further bus system 34 to the control input 32 of the two power supply modules 16 and applied there. The control units 80 of the power supply modules 16 receive and process the signal. Depending on this, the respective switch unit 82 is actuated, which is thus actuated depending on the signal present at the control input 32. When the switching unit 82 is open, there is no longer an electrical potential at the current output 36 of the module 18, and this is no longer connected to the first or second terminal 20, 24 of the power supply unit 20.Actuator 4 is therefore de-energized. However, the other module 14 continues to receive power, so that the electrical potential of the respective terminals 20 and 24 of the power supply unit 20 remains present at the current output 36 of the other module 14. Thus, continued operation of the control unit 6 is also possible. Consequently, the power supply module 16 serves to provide functional safety, and only safety-related functions are transmitted via the other bus system 34.

[0062] The power supply module 16 also includes a sensor 84, which is connected to the switching unit 82. The sensor 84 monitors the switching unit 82, allowing its switching state to be checked. For this purpose, the sensor 84 detects, for example, the voltage drop across the switching unit 82 and / or the current flowing through it. The sensor 84 is connected to the control unit 80 of the power supply module 16. Thus, after the switching unit 82 is actuated, the sensor 84 can verify whether the switching unit 82 has actually been actuated or whether it is malfunctioning. After detecting the signal present at the control input 32, which corresponds to a reliable function, and after the switching unit 82 has been actuated, the control unit 80 uses the sensor 84 to check its switching state.The corresponding state is fed into the further bus system 34 by the control unit 80 via the control input 32, and thus transmitted to the control unit 6.

[0063] In Fig. Figure 3 shows an embodiment of the switch unit 82. The switch unit 82 has a control contact 86, which is electrically connected to the control unit 80. Two switching elements 88 in the form of triacs, connected electrically in series, are connected to the control contact 86. Thus, when a corresponding voltage is applied to the control contact 86, both triacs are opened simultaneously, thereby interrupting the current flow through the switch unit 82. If one of the switching elements 88 malfunctions, the current flow is interrupted by the remaining switching element 88, thus increasing safety.

[0064] In Fig.Figure 4 shows one of the power distribution units 8 in perspective, comprising the feed-in module 12, the further module 14, the feed-in module 16, and the module 18, each designed as a modular device and each housing 38. The housings 38 are essentially identical in shape, so that the individual housings 38 are flush with each other. On the side opposite the mounting rail 10 and thus also the mounting device 40 are the two power inputs 26, 28 of the further feed-in module 12. Also located on this side are the control input 32 and the power input 30 of the feed-in module 16, thus facilitating the connection of a corresponding cable.The power output 36 of module 18 and of the identical module 14 is offset towards the mounting rail 10, and an operating element 90 is integrated into the front of the housing 38. Actuation of this element activates the respective switch 76. This allows for manual operation of module 18 and module 14. The levers 62 are rotatably mounted at their ends about a pivot axis 92 on the respective housing 38 and have a plastic carrier 94, which is mounted on the housing 38 by means of a corresponding bearing. The mating contacts 64, 66, 68, and 70, each made of elastic spring steel and U-shaped, are attached to the carrier 94.

[0065] The invention is not limited to the embodiment described above. Rather, other variants of the invention can also be derived by a person skilled in the art without departing from the subject matter of the invention. In particular, all individual features described in connection with the embodiment can also be combined with one another in other ways without departing from the subject matter of the invention. Reference symbol list 2 Annex 4 Actuator 6 Control unit 8 Power distribution 10 support rail 12 additional feed-in modules 14 additional modules 16 feed-in module Module 18 20 Power supply unit 22 first connection 24 second connection 26 first power input 28 second power input 30 Power input 32 Tax input 34 other bus systems 36 Power output 38 cases 40 Fastening device 42 additional contact areas 44 first further contact 46 second further contact 48 third further contact 50 fourth further contact 52 Contact area 54 first contact 56 second contact 58 third contact 60 fourth contact 62 levers 64 first contact 66 second contact 68 third contact 70 fourth counter-contact 72 Control unit of the additional feed-in module 74 bus system 76 switches 78 Control unit of the module / additional module 80 Control unit of the feed-in module 82 Switching unit 84 Sensor 86 Control contact 88 switching element 90 Control element 92 Swivel axis 94 carriers QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] DE 10 2015 218 108 B4

[0003] DE 20 2015 009 391 U1

[0003] Cited non-patent literature

[0000] EN IEC 61800-5-2:2007

[0023]

Claims

[1] Power supply module (16) for mounting on a mounting rail (10), - with a housing (38) which has a fastening device (40) for direct mounting on the mounting rail (10), and which has a contact area (52) with a first contact (54) and a further contact area (42) with a first further contact (44) and with a second further contact (46), - with a lever (62) pivotably mounted on the housing (38), which has a first counter contact (54), wherein by pivoting the lever (62) the first counter contact (64) can be brought into electrical contact with the first contact (54), - wherein the first contact (54) is electrically directly connected to the first further contact (44), - wherein the housing (38) has a power input (30) and a control input (32), - wherein the current input (30) is connected to the second further contact (46) via a switching unit (82), and - wherein the switching unit (82) is actuated depending on a signal applied to the control input (32). [2] Feed-in module (16) according to claim 1, characterized by , that a control unit (80) is arranged in the housing (38), which is connected to the control input (32) via signal technology, and by means of which the switching unit (82) is actuated. [3] Feed-in module (16) according to claim 2, characterized by , that the contact area (52) has a second contact (56) and the lever (62) has a second counter-contact (66), wherein by pivoting the lever (62) the second counter-contact (66) can be brought into electrical contact with the second contact (56), wherein the control unit (80) is electrically connected to the first contact (54) and to the second contact (56). [4] Feed-in module (16) according to claim 2 or 3, characterized bya sensor (84) for monitoring the switching unit (82), which is connected to the control unit (80) via a signal connection. [5] Feed-in module (16) according to any one of claims 1 to 4, characterized by , that the contact area (52) has a third contact (58) and the further contact area (42) has a third further contact (48) which are connected in a signaling manner, wherein the lever (62) has a third counter-contact (68), and wherein by pivoting the lever (62) the third counter-contact (68) can be brought into signaling contact with the third contact (58). [6] Feed-in module (16) according to any one of claims 1 to 5, characterized by , that the switching unit (82) has two switching elements (88) connected electrically in series. [7] Feed-in module (16) according to any one of claims 1 to 6, characterized by , that the switching unit (82) has a triac. [8] Power distribution (8) with a mounting rail (10) to which a feed-in module (16) according to one of claims 1 to 7 is attached, and to which a further feed-in module (12) as well as a module (18) and a further module (14) are attached, - wherein the further feed-in module (12), the module (18) and the further module (14) each have a housing (38) with a mounting device (40) for direct mounting on the mounting rail (10) and with a further contact area (42) comprising a first further contact (44) and a second further contact (46), - wherein the further module (14) is arranged between the two feed-in modules (12, 16) and the feed-in module (16) is arranged between the two modules (14, 18) and are adjacent to each other, - wherein the module (18) and the further module (14) have a contact area (52) with a first contact (54) and with a second contact (56) as well as a lever (62) pivotably mounted on the respective housing (38), which has a first counter contact (64) and a second counter contact (66), - wherein the further contacts (44, 46) of the further feed-in module (12) are in electrical contact with the contacts (54, 56) of the further module (14) by means of the lever (62) of the further module (14), - wherein the further contacts (44, 46) of the further module (14) are in electrical contact with the contacts (54, 56) of the feed-in module (16) by means of the lever (62) of the feed-in module (16), and - wherein the further contacts (44, 46) of the feed-in module (16) are in electrical contact with the contacts (54, 56) of the module (18) by means of the lever (62) of the module (18). [9] Plant (2), in particular industrial plant, comprising two power distribution units (8) according to claim 8, and comprising a control unit (6) which is electrically connected to the two further modules (14), and comprising an actuator (4) which is electrically connected to the modules (16). [10] Annex (2) according to claim 9, characterized by , that the control unit (6) is connected to the control inputs (32) via signal technology.

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