CN216118498U - Extended monitoring device for contactor, contactor assembly and monitoring system - Google Patents

Abstract

The present disclosure provides an extended monitoring device for a contactor, a contactor assembly and a monitoring system. The expansion monitoring device is connected with the contactor, comprises an IO expander, is connected with the contactor and a human-computer interaction interface and is used for establishing an information transmission channel between the contactor and the human-computer interaction interface, and the information transmission channel comprises a first information channel from the contactor to the human-computer interaction interface through the IO expander; the human-computer interaction interface is used for displaying the state of the contactor in real time, wherein the state comprises a normal state, a fault state, a switching state and an alarm state; the communication interface is connected with the contactor and used for establishing a communication channel between the contactor and the user monitoring equipment; and the power supply is connected with an external input power supply, is connected with components except the IO expander and the human-computer interaction interface in the expansion monitoring device, and is used for establishing a power supply network in the expansion monitoring device.

Description

Extended monitoring device for contactor, contactor assembly and monitoring system

Technical Field

Embodiments of the present disclosure relate to an extended monitoring device for a contactor, a contactor assembly and a monitoring system.

Background

The contactor is a key control element in motor control, and the contactor needs to be replaced frequently according to the abrasion condition of the contact, so that the motor control failure caused by the excessive abrasion of the contact is prevented, and when the motor control failure occurs, in addition to the possibility of equipment damage, the personnel injury can be caused more seriously. Therefore, it is very important for users to monitor the working state of the contactor and perform predictive maintenance on the contacts of the contactor, so as to maximize the effectiveness of the contactor and reduce the number of motor stops caused by replacing the contacts.

However, due to the limitations of the cost and the product size of the contactor, it is generally difficult to display the operating state on the contactor body or to implement only a simple warning prompt, and therefore how to economically and flexibly display the operating state of the contactor is a technical problem to be solved in the art.

SUMMERY OF THE UTILITY MODEL

The present disclosure is directed to an extended monitoring apparatus, a contactor assembly, and a monitoring system for a contactor, which flexibly show the operating state of the contactor outside the contactor, and the extended monitoring apparatus itself does not have a processor, which can reduce the cost and effectively show the operating state of the contactor.

At least one embodiment of the present disclosure provides an extended monitoring device for a contactor, the extended monitoring device is connected with the contactor, and the extended monitoring device includes an IO extender, a human-computer interaction interface, a communication interface, and a power supply; the IO expander is connected with the controller of the contactor and the human-computer interaction interface and used for establishing an information transmission channel between the controller and the human-computer interaction interface, and the information transmission channel comprises a first information channel from the controller to the human-computer interaction interface through the IO expander; the human-computer interaction interface is used for displaying the state of the contactor in real time, wherein the state comprises a normal state, a fault state, a switching state and an alarm state; the communication interface is connected with external user monitoring equipment and the controller and used for establishing a communication channel between the controller and the user monitoring equipment; and the power supply is connected with an external input power supply, is connected with components except the IO expander and the human-computer interaction interface in the expansion monitoring device, and is used for establishing a power supply network in the expansion monitoring device.

For example, in the extended monitoring device provided by an embodiment of the present disclosure, the information transmission channel further includes a second information channel from the human-machine interface to the contactor via the IO extender.

For example, in the extended monitoring apparatus provided in an embodiment of the present disclosure, the human-machine interface provides an operable interface for a user to receive information input by the user, where the information input by the user includes configuration information of the contactor. Therefore, on the basis of only displaying the state of the contactor, the extended monitoring device can further receive information input by a user, and diversification of functions is realized.

For example, in an extended monitoring apparatus provided in an embodiment of the present disclosure, the operable interface includes at least one of a knob, a key, a keyboard, and a touch screen.

For example, in an extended monitoring apparatus provided in an embodiment of the present disclosure, the extended monitoring apparatus further includes: and the communication isolator is connected with the communication interface and the contactor and is used for establishing a conversion center between a first communication protocol and a second communication protocol, wherein the first communication protocol is used by the communication interface, and the second communication protocol is used by the contactor, so that the contactor and the expansion monitoring device are isolated from each other.

For example, in the extension monitoring apparatus provided in an embodiment of the present disclosure, the IO extender is supplied with power by the contactor, and the power supplied by the contactor is isolated from the internal power supplied by the power supply. In this embodiment, power isolation can be achieved only by supplying power to the IO extender through the contactor, so that a dedicated external isolation device does not need to be additionally arranged, and a device for communication, the IO extender and the human-computer interaction interface can be mutually independent in work.

At least one embodiment of the present disclosure provides a contactor assembly comprising a contactor and an extended monitoring device connected as in the above embodiments; the contactor comprises a controller, an executor and a management circuit; the controller is connected with the IO expander of the expansion monitoring device and the management circuit and used for establishing a data transmission channel between the expansion monitoring device and the controller, and the information transmission channel comprises a first data channel from the controller to the expansion monitoring device through the IO expander and a second data channel from the expansion monitoring device to the controller through the IO expander or through the management circuit; an actuator for opening or closing a contact of the contactor; and a management circuit connected to the IO extender for supplying power to the IO extender.

For example, in the contactor assembly provided by an embodiment of the present disclosure, the controller is further connected to the communication interface of the extended monitoring device, and is configured to establish a communication channel between the contactor and the communication interface; or the controller is also connected with the communication interface through the communication isolator and is used for establishing a communication channel between the contactor and the communication interface through the communication isolator.

At least one embodiment of the present disclosure provides a monitoring system of a contactor, including: at least one contactor assembly as in the previous embodiments; and a user monitoring device connected to the at least one contactor assembly.

For example, in a monitoring system provided by an embodiment of the present disclosure, each of at least one contactor assembly is independently connected to a user monitoring device; or at least one contactor assembly is connected with the user monitoring equipment through the same contactor assembly; or at least one contactor assembly is connected to the user monitoring device via a bus.

Drawings

To more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly described below, and it should be apparent that the drawings described below only relate to some embodiments of the present disclosure and are not limiting on the present disclosure.

Fig. 1 is a schematic structural diagram of an extended monitoring device for a contactor according to at least one embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of another extended monitoring device for a contactor according to at least one embodiment of the present disclosure;

fig. 3 is a schematic structural view of a contactor assembly according to at least one embodiment of the present disclosure;

fig. 4 is a schematic structural view of yet another contactor assembly according to at least one embodiment of the present disclosure;

fig. 5A is a logic diagram of a contactor assembly according to at least one embodiment of the present disclosure;

fig. 5B is a flow chart of a method performed by a contactor assembly according to at least one embodiment of the present disclosure;

fig. 6 is a schematic view of a monitoring system for a contactor according to at least one embodiment of the present disclosure;

fig. 7 is a schematic view of an implementation of a contactor assembly according to at least one embodiment of the present disclosure.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be described below clearly and completely with reference to the accompanying drawings. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.

Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

At least one embodiment of the present disclosure provides an extended monitoring device for a contactor, the extended monitoring device is connected with the contactor, and the extended monitoring device includes an IO extender, a human-computer interaction interface, a communication interface, and a power supply; the IO expander is connected with the controller of the contactor and the human-computer interaction interface and used for establishing an information transmission channel between the controller and the human-computer interaction interface, and the information transmission channel comprises a first information channel from the controller to the human-computer interaction interface through the IO expander; the human-computer interaction interface is used for displaying the state of the contactor in real time, wherein the state comprises a normal state, a fault state, a switching state and an alarm state; the communication interface is connected with the controller and is used for establishing a communication channel between the controller and the user monitoring equipment; and the power supply is connected with an external input power supply, is connected with components except the IO expander and the human-computer interaction interface in the expansion monitoring device, and is used for establishing a power supply network in the expansion monitoring device.

At least one embodiment of the present disclosure provides a contactor assembly comprising a contactor and an extended monitoring device connected as in the above embodiments; the contactor comprises a controller, an executor and a management circuit; the controller is connected with the IO expander of the expansion monitoring device and the management circuit and used for establishing a data transmission channel between the expansion monitoring device and the controller, and the information transmission channel comprises a first data channel from the controller to the expansion monitoring device through the IO expander and a second data channel from the expansion monitoring device to the controller through the IO expander or through the management circuit; an actuator for opening or closing a contact of the contactor; and a management circuit connected to the IO extender for supplying power to the IO extender.

At least one embodiment of the present disclosure provides a monitoring system of a contactor, including: at least one contactor assembly as in the previous embodiments; and a user monitoring device connected to the at least one contactor assembly.

The present disclosure can flexibly show the operating state of the contactor outside the contactor by proposing an extended monitoring device, a contactor assembly and a monitoring system for the contactor, and the extended monitoring device itself can reuse the controller inside the contactor without providing a processor, and can also reduce the cost. The remote monitoring of the operating state of the contactor and the remote operation and maintenance can be realized by communicating with an external user monitoring device.

Fig. 1 shows a schematic structural diagram of an extended monitoring device 100 for a contactor according to at least one embodiment of the present disclosure.

As shown in fig. 1, the expansion monitoring apparatus 100 includes an IO expander 101, a human-machine interface 102, a communication interface 103, and a power supply 104. The IO extender 101 is connected to the contactor 110 and the human-machine interface 102. It should be noted that the connection in the present disclosure includes a direct connection or an indirect connection, and the connection in the present disclosure can be understood as long as both of the "connection" and the "connection" achieve electrical connection.

The IO extender 101 is configured to receive the first information of the contactor 110 and send the first information to the human-computer interaction interface 102. IO extender 101 communicates with contactor 110 via I2C, SPI, UART, or other protocol. Besides the human-machine interface 102, the IO extender 101 may also implement extension of a plurality of other input/output interfaces (not shown in the drawings) of the contactor 110, and the number of the specifically extended interfaces may be set according to actual needs. For example, no control unit is provided inside the expansion monitoring apparatus 100, and the IO expander 101 specifically communicates with the controller in the contactor 110, so that the controller completes the operations of the IO expander and the human-computer interaction interface 102.

The first information includes status information of the contactor 110, which may be acquired by the contactor 110 according to the status of the contacts, and/or alarm information, which may be generated by the contactor 110 according to the status of the contacts or based on currently stored status information. The operating states of the contacts (which may also be referred to simply as states) include a normal state, a fault state, a switching state and an alarm state. The alarm state can be understood as a fault state in which the situation is critical or a state which has already been reported to the user but has not yet been resolved. For example, when the remaining life of the contact is less than the preset life value, the contactor 110 generates an alarm message to prompt the timely replacement of the contact. As another example, the contactor 110 finds that the contacts are currently in a fault state, thereby generating an alarm message to prompt the user to address the fault.

It should be noted that the above working states are only examples of the working states of the contacts and are not exhaustive, the working states of the contacts may also include other existing working states, and the number and names of the working states may be set according to actual requirements.

The first information may also include any information related to the contactor 110, such as identification information of the contactor 110, input voltage, temperature, history information, and the like.

And the human-computer interaction interface 102 is used for showing the state of the contactor in real time according to the first information. For example, the human-computer interface 102 is any device such as a display, an LED or LCD lighting device, etc. having a function of displaying (or showing) the state of the contactor. The interface may show the state of the contactor 110 in the form of sound, light, text, images, and the like. For example, the operable interface may be provided with a light emitting device such as an LED or LCD so that the state of the contactor 110 can be shown by corresponding different states to different colors or blinking patterns of light. Alternatively, if a display device is provided on the operability interface, an icon or a text description may be displayed to show the state of the contactor 110.

Optionally, the human-computer interaction interface 102 is a user operable interface, and is further configured to receive second information input by a user through the operable interface, and send the second information to the IO extender 101. The operable interface includes at least one of a knob, a key, a keypad, and a touch screen. The second information includes configuration information and/or operational controls. The IO extender 101 is configured to receive the second information and forward the second information to the contactor 110. The configuration information includes configuration parameters of the contactor 110, such as telecommunications parameters (address, baud rate, etc.), and the like. The operation control includes an instruction to reset the contactor, and the user may input the second information by rotating a knob, key input, keyboard input, or the like.

A communication interface 103 for providing a communication function with the extended monitoring apparatus 100 to an external user monitoring device 120 and transmitting the first information to the user monitoring device 120. For example, the communication interface 103 may be connected with the user control device 120 via a field bus, such as an RS485 or CAN bus.

Optionally, the communication interface 103 is connected to the contactor 110. The communication interface 103 and the IO extender 101 are connected to the contactor 110 using different protocols. Similar to the IO extender 101, the communication interface 103 is commonly connected to and operated by a controller within the contactor 110.

Still optionally, the communication interface 103 further receives third information from the user monitoring device 120 and sends the third information to the contactor 110, the third information including configuration information and/or data access requests and/or operation controls. The third information may include a software upgrade package for upgrading a controller in the contactor, in addition to all or similar information to the second information.

The power supply 104 is connected to an external input power supply 130. The power supply 104 is used for supplying internal power to the components of the expansion monitoring device 100 except the IO expander 101 and the human-machine interface 102 according to the input power 130. For example, the input power supply 130 provides a voltage of 24V, and the power supply 104 may supply a voltage less than or equal to 24V to, for example, the communication interface 103.

Optionally, IO extender 101 is powered by contactor 110, and the power supplied by contactor 110 is isolated from the power supplied by power source 104, i.e., the power supplied by contactor 110 is independent of the power supplied by power source 104. For example, the contactor 110 supplies a voltage of 15V to the IO extender 101. Generally, in order to achieve electrical isolation and/or communication isolation between the contactor and other devices, a separate isolation device dedicated to achieving isolation is required to be provided between the contactor and the other devices. However, the special isolation device inevitably leads to an increase in cost, which is disadvantageous. The embodiment of the present application provides for the power supply from the contactor 110 to the IO extender 101, so that the IO extender 101 and the human machine interface 102 following it can be considered as part of the contactor 110, which naturally has electrical isolation from other devices within the extension monitoring apparatus 100, and therefore can be kept at a low cost. Furthermore, the IO extender 101 and the human machine interface 102 may also work independently due to electrical isolation.

Fig. 2 shows a schematic structural diagram of an extended monitoring device 200 provided according to an embodiment of the present disclosure.

The expansion monitoring device 200 comprises an IO expander 201, a human-computer interaction interface 202, a communication interface 203, a power supply 204 and a communication isolator 205. Similar to the expansion monitoring apparatus 100 of fig. 1, the contactor 110 is connected to the human-computer interface 202 via the IO expander 201, the communication interface 203 is connected to the user monitoring device 120, and the power supply 204 is connected to the input power supply 130. Components having similar or identical reference numerals in fig. 1 and 2 have the same function and are not described again. The difference is that the expansion monitoring device 200 further comprises a communication isolator 205 and the power supply 204 further supplies power to the communication isolator 205.

The communication isolator 205 is connected to the communication interface 203 and to the contactor 110. The communication isolator 205 is configured to convert between a first communication protocol used by the communication interface 203 and a second communication protocol used by the contactor 110, so that the contactor 110 and the extended monitoring device 200 are isolated from each other. For example, if the communication isolator 205 receives data from the contactor 110 in the UART protocol and the communication interface 203 uses the RS485 protocol, the communication isolator 205 converts the data from the UART protocol to the RS485 protocol. In addition to providing communication isolation, the communication isolator 205 also provides electrical isolation between the contactor 110 and the communication interface 203 because there is no physical direct connection.

Fig. 3 illustrates a schematic structural view of a contactor assembly 300 provided according to an embodiment of the present disclosure.

The contactor assembly 300 includes a contactor 310 and an extended monitoring device. The expansion monitoring device may be the expansion monitoring device 100 shown in fig. 1 or the expansion monitoring device 200 shown in fig. 2, and the expansion monitoring device 100 is taken as an example in fig. 3. The contactor 310 is connected to the expansion monitoring apparatus 100, and the expansion monitoring apparatus 100 is connected to the user monitoring device 120 and the input power source 130. The controller 311 may be a micro control unit MCU.

The contactor 310 includes a controller 311, an actuator 312, and a management circuit 313. The controller 311 is connected to the management circuit 313 and to the actuator 312 inside the contactor 310.

The actuator 312 is used to open or close the contacts of the contactor 310 according to the operation of the controller 311.

To the outside, the controller 311 is connected to the IO extender 101 of the extension monitoring apparatus 100. Controller 311 sends first information of contactor 310 to IO extender 101 and receives second information sent by IO extender 101 directly or via management circuit 313, the first information including status information and/or alarm information, the second information including configuration information and/or operation control. The first information and the second information may refer to the description in the above embodiments, and are not described herein again.

The controller 311 is also connected to the communication interface 103 of the expansion monitoring apparatus 100. The controller 311 sends communication configuration parameters from a memory (not shown) in the controller 311 to the communication interface 103 to thereby implement a communication configuration for the communication interface 103, which communication interface 103 may communicate with the user monitoring device 120 after being configured. The controller 311 receives the third information from the user monitoring device 120, and when the third information is a data access request, the controller 311 retrieves corresponding data from the memory of the contactor 310 in response to the data access request and provides the corresponding data to the user monitoring device 120 in response.

The management circuit 313 is connected to the IO extender 101. The management circuit 313 determines whether the extension monitoring device 100 has been connected to the contactor 310 and supplies power to the IO extender 101 according to the signal level at the port connected to the IO extender 101. For example, the management circuit 313 determines that no extension monitoring device 100 is currently connected to the contactor 310 based on a no signal level (e.g., open circuit) at the port.

Fig. 4 illustrates a schematic structural diagram of a contactor assembly 400 provided according to an embodiment of the present disclosure.

As shown in fig. 4, the contactor assembly 400 includes the contactor 310 and the extended monitoring device 200. The contactor assembly 400 is similar to the contactor assembly 300, and the description of the contactor assembly 400 can be found in relation to the contactor assembly 300, except that the controller 311 is also connected to the communication isolator 205.

The controller 311 is connected to the communication interface 203 via the communication isolator 205. The controller 311 sends the communication configuration parameters from the memory in the contactor 310 to the communication interface 203 via the communication isolator 205, thereby enabling communication configuration of the communication interface 203 by the communication isolator 205.

Fig. 5A illustrates a logic diagram of a contactor assembly 500 provided according to an embodiment of the present disclosure.

As shown in fig. 5A, the contactor assembly 500 includes a data buffer 501, a remote communication module 502, an extended monitoring device management module 503, an alarm diagnostic module 504, a storage management module 505, and a contact control module 506.

The data buffer 501 is connected to all other modules in the contactor assembly 500 as a center for data interaction. The data buffer 501 may be implemented as a segment of memory space in a memory, which is used to temporarily store data retrieved from the memory, thereby leaving other modules out of direct contact with the memory and enabling decoupling between the modules.

The remote communication module 502 is connected to the user monitoring device 120 and manages data interaction with the user monitoring device 120, for example, the remote communication module 502 manages data interaction with a fieldbus. The remote communication module 502 also processes data access requests or commands from the user monitoring device 120 and controls/operates the data buffer 501 to retrieve the requested data from the memory or controls the contactor to execute the commands.

The expansion monitoring device management module 503 is used to manage, for example, the state of the expansion monitoring device 100 or 200 and obtain the state of the human-machine interaction interface. The expansion monitoring device management module 503 also converts the acquired state of the human-computer interaction interface into an input parameter of the user, and stores the input parameter in the memory through the data buffer 501. The extended monitoring device management module 503 also outputs the alarm information/status information of the contactor itself to the human-computer interaction interface through the IO extender in real time, so that the human-computer interaction interface can show the current status of the contactor.

The alarm diagnosis module 504 generates alarm information according to the state or state information of the contactor. Or still further generate diagnostic results to assist the user in identifying the current fault or criticality. The alarm diagnostic module 504 saves the generated alarm information and/or diagnostic results into memory via the data buffer 501.

The storage management module 505 is used to obtain data to be saved from the data buffer 501 and manage storage of the data. The memory in the contactor may be any suitable type of memory such as DRAM, ROM, etc.

The corresponding hardware of the contactor assembly 500 in fig. 5A may be the contactor assembly 300 or 400. Since the extension monitor device 100 or 200 has no controller per se, it operates by multiplexing the controller inside the contactor, and since no controller is provided, the extension monitor device can significantly reduce the cost. The functions to be realized by the extended monitoring device are simple, and the processing capacity of a controller of the contactor cannot be occupied too much, namely the normal work of the contactor cannot be influenced.

Fig. 5B illustrates a flow chart of a method performed by the contactor assembly 500 provided according to an embodiment of the present disclosure.

As shown in fig. 5B, the method is an example flow for expanding the monitoring device in normal operation. The method of fig. 5B may be performed by the contactor assembly 300, the contactor assembly 400, or the contactor assembly 500 described above.

And S510, electrifying the contactor.

S520, the management module of the extended monitoring device acquires the installation state of the extended monitoring device. For example, the expansion monitoring device management module acquires a signal level at a port where the management circuit is connected to the IO expander.

S530, judging whether the expansion monitoring device is installed. For example, the acquisition of the signal level determines that the extension monitoring apparatus is already installed, and continues to perform step S540. If there is no signal level, the flow ends.

And S540, the management module of the extended monitoring device acquires the configuration parameters input by the user and sends the configuration parameters to the data buffer. For example, the expansion monitoring device management module reads parameters input by a user on the human-computer interaction interface from the IO expander.

S550, the remote communication module acquires the communication configuration parameters from the data buffer and initializes the remote communication protocol. For example, the remote communication module obtains an address and a communication rate and initializes the remote communication protocol to the communication interface to enable the communication interface to communicate with the user monitoring device.

And S560, the extended monitoring device management module acquires the alarm information and the diagnosis result of the contactor from the data buffer and sends the alarm information and the diagnosis result to the extended monitoring device.

S570, the remote communication module determines whether a request from the user monitoring device is received. If yes, step S580 is executed, and if no, step S560 is executed.

S580, the remote communication module obtains the requested data from the data buffer and sends it to the user monitoring device.

The above steps S560-S580 are performed in a loop in the power-on state of the contactor, for example, if the user monitoring device does not send any request, the steps S560 and S570 are performed in a loop continuously. The cyclic execution process can also ensure that the current state of the contactor is continuously shown on the human-computer interaction interface in real time.

Fig. 6 illustrates a schematic diagram of a monitoring system 600 for a contactor provided in accordance with an embodiment of the present disclosure.

As shown in FIG. 6, monitoring system 600 includes user monitoring device 120 and N contactor assemblies. Wherein N is a positive integer. The monitoring system 600 may also replace the user monitoring device 120 with other devices/apparatuses on the user side, which is not limited herein. Any of which may be, for example, contactor assembly 300 or contactor assembly 400.

The user monitoring device 120 is connected to N contactor assemblies. For example, each of the N contactor assemblies is independently connected to the user monitoring device, i.e., each of the contactor assemblies 1-N is connected to the user monitoring device 120.

Or the N contactor assemblies are connected with the user monitoring equipment through the same contactor assembly. For example, contactor modules 1 through N-2 and contactor module N are all connected to contactor module N-1, and only contactor module N-1 is connected to user monitoring device 120.

The N contactor assemblies are connected to the user monitoring device 120 via a bus. Such as a CAN bus.

Figure 7 illustrates a schematic diagram of one implementation of providing a contactor assembly according to an embodiment of the present disclosure.

As shown in fig. 7, CMD denotes a contactor, RDM denotes an extension monitoring device, and PLC denotes a user monitoring device. The contactors employ half-duplex and RDM communications. The contactor and RDM each provide 6 pins to connect with each other. Pin 1 provides 15V power to the RDM for the contactor. Pin 2 is the pin used by the contactor to send data to the RDM. Pin 3 bit contactor receives the pin used by the data from the RDM. Pin 4 is a pin through which the contactor sends an indication signal to the RDM to switch between data reception and data transmission. Pin 5 is a pin for data transmission using the I2C protocol. Pin 6 bit contactor synchronizes the clock signal pins to the RDM.

The RDM is connected with the contactor by adopting a UART protocol and is connected with the PLC by adopting an RS485 protocol. The communication data of the Modbus-RTU protocol is followed.

The contactor in which the RDM is configured supports the following functions:

(1) modbus communication based on a daisy chain topology structure;

(2) providing autonomous selection configuration of wide-range addresses, various baud rates and verification modes;

(3) supporting software upgrade of CMD.

The contactor may provide first information to the user via RDM, which in embodiments includes, but is not limited to: a history of CMD serial number, release/pull-in status of coil, current input voltage, under voltage/over voltage alarm, over temperature alarm, CMD internal error alarm, contact remaining life, contact wear alarm, contact sticking alarm, and last 5 alarms.

It will be appreciated that the contactor assembly shown in figure 7 may also perform the method set forth in figure 5B.

The block diagrams of circuits, units, devices, apparatuses, devices, systems referred to in this disclosure are only used as illustrative examples and are not intended to require or imply that the connections, arrangements, configurations, etc. must be made in the manner shown in the block diagrams. As will be appreciated by one skilled in the art, these circuits, units, devices, apparatuses, devices, systems may be connected, arranged, configured in any way as long as the desired purpose is achieved. The circuits, units, devices and apparatuses involved in the present invention may be implemented in any suitable manner, for example, by using an application specific integrated circuit, a Field Programmable Gate Array (FPGA), etc., or by using a general-purpose processor in combination with a known program.

The above description is only an embodiment of the present disclosure, and the protection scope of the present disclosure is not limited thereto, and the protection scope of the present disclosure should be subject to the protection scope of the claims. The drawings of the embodiments of the disclosure only relate to the structures related to the embodiments of the disclosure, and other structures can refer to common designs. Without conflict, embodiments of the present disclosure and features of the embodiments may be combined with each other to arrive at new embodiments.

Claims (10)

1. An extended monitoring device for a contactor, said extended monitoring device being connected to said contactor,

the expansion monitoring device comprises an IO expander, a human-computer interaction interface, a communication interface and a power supply;

the IO expander is connected with the controller of the contactor and the human-computer interaction interface and used for establishing an information transmission channel between the controller and the human-computer interaction interface, and the information transmission channel comprises a first information channel from the controller to the human-computer interaction interface through the IO expander;

the human-computer interaction interface is used for displaying the state of the contactor in real time, wherein the state comprises a normal state, a fault state, a switch state and an alarm state;

the communication interface is connected with external user monitoring equipment and the controller and used for establishing a communication channel between the controller and the user monitoring equipment; and

the power supply is connected with an external input power supply, is connected with components except the IO expander and the human-computer interaction interface in the expansion monitoring device, and is used for establishing a power supply network in the expansion monitoring device.

2. The expansion monitoring device of claim 1,

the information transmission channel further comprises a second information channel from the human-computer interaction interface to the contactor via the IO extender.

3. The extension monitoring device of claim 1 or 2,

the human-computer interaction interface provides an operable interface for a user to receive user-input information including configuration information of the contactor.

4. The extended monitoring device of claim 3, wherein the operable interface includes at least one of a knob, a key, a keypad, and a touch screen.

5. The extension monitoring apparatus of claim 1, further comprising:

and the communication isolator is connected with the communication interface and the contactor and used for establishing a conversion center between a first communication protocol and a second communication protocol, wherein the first communication protocol is a communication protocol used by the communication interface, and the second communication protocol is a communication protocol used by the contactor, so that the contactor and the expansion monitoring device are isolated from each other.

6. The expansion monitoring device of claim 1,

the IO extender is supplied with power from the contactor, and the power supplied from the contactor is isolated from an internal power supplied from the power supply.

7. A contactor assembly, characterized in that,

the contactor assembly comprises a contactor and an extension monitoring device according to any one of claims 1-6;

the contactor comprises a controller, an actuator and a management circuit;

the controller is connected with an IO expander of the expansion monitoring device and the management circuit, and is used for establishing a data transmission channel between the expansion monitoring device and the controller, wherein the information transmission channel comprises a first data channel from the controller to the expansion monitoring device via the IO expander and a second data channel from the expansion monitoring device to the controller via the IO expander or via the management circuit;

the actuator is used for opening or closing the contact of the contactor; and

and the management circuit is connected with the IO expander and used for supplying power to the IO expander.

8. The contactor assembly as claimed in claim 7,

the controller is also connected with a communication interface of the extended monitoring device and used for establishing a communication channel between the contactor and the communication interface; or,

the controller is also connected with a communication interface through a communication isolator and used for establishing a communication channel between the contactor and the communication interface through the communication isolator.

9. A monitoring system for a contactor, comprising:

at least one contactor assembly according to claim 7 or 8; and

and the user monitoring equipment is connected with the at least one contactor assembly.

10. A monitoring system in accordance with claim 9,

each of the at least one contactor assembly is independently connected to the user monitoring device; or

The at least one contactor assembly is connected with the user monitoring equipment through the same contactor assembly; or

The at least one contactor assembly is connected to the user monitoring device via a bus.

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