Remote communication substation device

Abstract

The embodiment of the utility model provides a remote communication substation device, and belongs to the field of industrial control. A remote communication substation device is arranged on an IO module bottom plate, at least one IO module is further arranged on the IO module bottom plate, and the remote communication substation device communicates with the IO modules. The remote communication substation device comprises an MCU chip, a plurality of external communication interface circuits and a plurality of internal interface circuits, the external communication interface circuits are connected with the MCU chip and the main control module at the same time, and the internal interface circuits are connected with the MCU chip and the IO module bottom plate at the same time; the plurality of external communication interface circuits comprise an Ethernet interface circuit, an optical fiber transceiver interface circuit, an RS485 external communication interface circuit and a CAN communication interface circuit. According to the remote communication substation device, various external communication interface circuits and internal interface circuits are provided, so that the requirements of the field on various different communication modes are met, and information conversion among the different communication modes is realized.

Description

Technical Field

[0001] The utility model relates to the field of industrial control, in particular to a remote communication substation device. Background Art

[0002] With the continuous development of industrial control fields such as power, coal mining, and chemical industry, there are more and more types of communication methods, such as Ethernet communication, optical fiber communication, RS485 communication, and CAN communication. Communication methods are increasingly used in industrial sites. The demand for information conversion between different communication methods is increasing. Based on this, information conversion devices between different communication methods are becoming more and more important.

[0003] The communication modes of existing communication module devices are relatively single and cannot meet the needs of various communication modes on site. Therefore, how to meet the needs of various communication modes on site in the industrial control field is a problem that needs to be solved urgently. Utility Model Content

[0004] The purpose of the embodiment of the utility model is to provide a remote communication substation device, which provides a wide variety of external communication interface circuits and internal interface circuits to meet the needs of various communication methods on site and realize information conversion between different communication methods.

[0005] In order to achieve the above-mentioned purpose, the embodiment of the utility model provides a remote communication substation device, which is arranged on an IO module base plate, and at least one IO module is also arranged on the IO module base plate. The remote communication substation device communicates with each IO module through the IO module base plate, and the remote communication substation device is communicatively connected with a main control module;

[0006] The remote communication substation device includes an MCU chip, multiple external communication interface circuits and multiple internal interface circuits. Each external communication interface circuit is connected to the MCU chip and the main control module at the same time, and each internal interface circuit is connected to the MCU chip and the IO module baseboard at the same time.

[0007] Among them, the various external communication interface circuits include Ethernet interface circuit, fiber optic transceiver interface circuit, RS485 external communication interface circuit and CAN communication interface circuit.

[0008] Optionally, the remote communication substation device further includes a switch chip connected to the MCU chip, and the Ethernet interface circuit and the optical fiber transceiver interface circuit are respectively connected to the MCU chip via the switch chip.

[0009] Optionally, the Ethernet interface circuit includes RJ45 and a network port transformer, one end of the RJ45 is connected to the main control module, the other end of the RJ45 is connected to one end of the network port transformer, and the other end of the network port transformer is connected to the switch chip.

[0010] Optionally, the RS485 external communication interface circuit includes a first isolation chip, a 485 signal conversion chip and an RS485 external interface, one end of the first isolation chip is connected to the MCU chip, the other end of the first isolation chip is connected to one end of the 485 signal conversion chip, and the other end of the 485 signal conversion chip is connected to the RS485 external interface.

[0011] Optionally, the CAN communication interface circuit includes a second isolation chip, a CAN signal conversion chip and a CAN interface, one end of the second isolation chip is connected to the MCU chip, the other end of the second isolation chip is connected to one end of the CAN signal conversion chip, and the other end of the CAN signal conversion chip is connected to the CAN interface.

[0012] Optionally, an MDIO bus is provided between the MCU chip and the switch chip.

[0013] Optionally, the multiple internal interface circuits include RS485 internal communication interface circuit, RS422 internal communication interface circuit and internal 100M network circuit, and the RS485 internal communication interface circuit, RS422 internal communication interface circuit and internal 100M network circuit are respectively connected to the MCU chip.

[0014] Optionally, the Ethernet interface circuit, the optical fiber transceiver interface circuit, the RS485 external communication interface circuit and the CAN communication interface circuit are all two-way.

[0015] Optionally, the main control module and two remote communication substation devices form a ring network.

[0016] Optionally, one of the Ethernet interface circuits of any remote communication substation device is connected to the main control module, and another Ethernet interface circuit of the remote communication substation device is connected to another remote communication substation device.

[0017] One of the Ethernet interface circuits of the station device and another Ethernet interface circuit of another remote communication substation device are connected to the main control module.

[0018] Optionally, one of the fiber optic transceiver interface circuits of any remote communication substation device is connected to the main control module, another fiber optic transceiver interface circuit of the remote communication substation device is connected to one of the fiber optic transceiver interface circuits of another remote communication substation device, and another fiber optic transceiver interface circuit of another remote communication substation device is connected to the main control module.

[0019] Optionally, a cross communication method is used, and the cross communication method is:

[0020] When the optical fiber transceiver interface circuit of any remote communication substation device communicates with the main control module, the Ethernet interface circuit of the remote communication substation device communicates with another remote communication substation device;

[0021] When the Ethernet interface circuit of any remote communication substation device communicates with the main control module, the optical fiber transceiver interface circuit of the remote communication substation device communicates with another remote communication substation device.

[0022] Optionally, the RS485 external communication interface circuit is connected to an RS485 communication interface of an external device.

[0023] Optionally, the CAN communication interface circuit is connected to a CAN communication interface of an external device.

[0024] Through the above technical scheme, a remote communication substation device is provided, which is arranged on the IO module base plate, and at least one IO module is also arranged on the IO module base plate. The remote communication substation device communicates with each IO module through the IO module base plate, and the remote communication substation device is communicatively connected with the main control module; the remote communication substation device includes an MCU chip, a plurality of external communication interface circuits and a plurality of internal interface circuits, each external communication interface circuit is connected to the MCU chip and the main control module at the same time, and each internal interface circuit is connected to the MCU chip and the IO module base plate at the same time; wherein the plurality of external communication interface circuits include an Ethernet interface circuit, an optical fiber transceiver interface circuit, an RS485 external communication interface circuit and a CAN communication interface circuit. The remote communication substation device communicates with the main control module through an external communication interface circuit corresponding to the communication mode of the main control module, thereby receiving the transmission data of the main control module. And the transmission data of the main control module is forwarded to the IO module arranged on the IO module base plate through the internal interface circuit. After receiving and processing the transmission data, the IO module sends the processed transmission data to the MCU chip through the internal interface circuit, and then the MCU chip sends the processed transmission data through the external communication interface circuit.

[0025] The remote communication substation device provides a wide variety of external communication interface circuits (including Ethernet interface circuits, optical fiber transceiver interface circuits, RS485 external communication interface circuits and CAN communication interface circuits) and internal interface circuits, which can meet the needs of various communication methods on site and realize information conversion between different communication methods.

[0026] Other features and advantages of the embodiments of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are used to provide a further understanding of the embodiments of the present utility model and constitute a part of the specification. Together with the following specific implementations, they are used to explain the embodiments of the present utility model, but do not constitute a limitation on the embodiments of the present utility model. In the accompanying drawings:

[0028] Figure 1It is a structural block diagram of a remote communication substation device provided by one embodiment of the utility model;

[0029] Figure 2 It is a hardware block diagram of a remote communication substation device provided by one embodiment of the utility model;

[0030] Figure 3 This is an application schematic diagram of a remote communication substation device provided by one embodiment of the utility model;

[0031] Figure 4 It is a communication flow chart of a remote communication substation device provided by one embodiment of the utility model.

[0032] Description of Reference Numerals

[0033] 1-IO module baseboard, 2-IO module, 3-main control module, 4-MCU chip, 5-internal interface circuit, 6-Ethernet interface circuit, 7-fiber transceiver interface circuit, 8-RS485 external communication interface circuit, 9-CAN communication interface circuit, 10-switch chip, 11-RJ45, 12-network port transformer, 13-first isolation chip, 14-485 signal conversion chip, 15-RS485 external interface, 16-second isolation chip

[0034] chip, 17-CAN signal conversion chip, 18-CAN interface, 19-RS485 internal communication interface circuit, 20-RS422 internal communication interface circuit, 21-internal 100M network circuit, 22-external equipment. DETAILED DESCRIPTION

[0035] The specific implementation of the embodiment of the utility model is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the utility model, and is not used to limit the embodiment of the utility model.

[0036] In the embodiments of the present utility model, unless otherwise specified, directional words such as "up, down, left, right" generally refer to the directions or positional relationships shown in the accompanying drawings, or the directions or positional relationships in which the utility model product is usually placed when in use.

[0037] The terms “first”, “second”, “third”, etc. are merely used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0038] The terms "parallel", "vertical", etc. do not mean that the components must be absolutely parallel or vertical, but can be slightly tilted. For example, "parallel" only means that its direction is more parallel than "vertical", and does not mean that the structure must be completely parallel, but can be slightly tilted.

[0039] The terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal, vertical or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0040] In addition, the terms "roughly" and "basically" are intended to explain that the relevant content does not require absolute precision, but can have certain deviations. For example, "roughly equal" does not only mean absolute equality. Since it is difficult to achieve absolute "equality" in actual production and operation, there are generally certain deviations. Therefore, in addition to absolute equality, "roughly equal" also includes the above-mentioned situation with certain deviations. Taking this as an example, in other cases, unless otherwise specified, the terms "roughly" and "basically" have similar meanings to the above.

[0041] In the description of the present utility model, it is also necessary to explain that, unless otherwise clearly specified and limited,

[0042] The terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, they can be fixedly connected, detachably connected, or integrally connected; they can be directly connected, or indirectly connected through an intermediate medium, or they can be internally connected between two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0043] Please refer to Figure 1 , Figure 1 It is a structural block diagram of a remote communication substation device provided by an embodiment of the utility model. This embodiment provides a remote communication substation device, which is arranged on an IO module base plate 1, and at least one IO module 2 is also arranged on the IO module base plate 1. The remote communication substation device communicates with each IO module 2 through the IO module base plate 1, and the remote communication substation device is communicatively connected with a main control module 3; the remote communication substation device includes an MCU chip 4, a plurality of external communication interface circuits and a plurality of internal interface circuits 5, each external communication interface circuit is simultaneously connected to the MCU chip 4 and the main control module 3, and each internal interface circuit 5 is simultaneously connected to the MCU chip 4 and the IO module base plate 1; wherein the plurality of external communication interface circuits include an Ethernet interface circuit 6, an optical fiber transceiver interface circuit 7, an RS485 external communication interface circuit 8 and a CAN communication interface circuit 9.

[0044] Specifically, the remote communication substation device is installed on the IO module base plate 1, communicates with the IO module 2 through the IO module base plate 1, and communicates with the main control module 3 through the external communication interface circuit corresponding to the communication mode of the main control module 3, thereby receiving the transmission data of the main control module 3. The transmission data of the main control module 3 is forwarded to the IO module 2 set on the IO module base plate 1 through the internal interface circuit 5. After receiving and processing the transmission data, the IO module 2 sends the processed transmission data to the MCU chip 4 through the internal interface circuit 5, and then sends the processed transmission data to the main control module 3 through the external communication interface circuit through the MCU chip 4. The remote communication substation device provides a variety of external communication interface circuits (including Ethernet interface circuit 6, optical fiber transceiver interface circuit 7, RS485 external communication interface circuit 8 and CAN communication interface circuit 9) and internal interface circuit 5, so as to meet the needs of various communication modes on site and realize information conversion between different communication modes.

[0045] It should be noted that the remote communication substation device is used as a communication device when the main control module 3 is expanded.

[0046] The remote communication substation device is responsible for communicating with the main control module 3 upwards and with the IO module 2 downwards through the IO module base plate 1. In on-site industrial environments such as fans, the main control module 3 is far away from various IO modules 2, and the remote communication substation device is needed as a communication transfer device to connect the main control module 3 and the remote IO module 2 (the remote IO module 2 represents the IO module 2 far away from the main control module 3). The main function of the remote communication substation device is to receive the transmission data of the main control module 3, forward it to the various IO modules 2 on the IO module base plate 1, receive the digital level acquisition, measurement analysis and logic control data generated by various industrial controls received by various IO modules 2, and reply to the main control module 3.

[0047] In actual application, the remote communication substation device communicates with the main control module 3 mainly through the Ethernet interface circuit 6 or the optical fiber transceiver interface circuit 7. The appropriate communication method can be selected based on comprehensive consideration of factors such as the communication port type of the main control module 3 and the distance from the communication substation, thereby selecting a suitable external communication interface circuit.

[0048] The Ethernet port signal speed included in the Ethernet interface circuit 6 can reach up to 100M at the highest, and the optical fiber signal transceiver module speed included in the optical fiber transceiver interface circuit 7 can reach up to 100M at the highest.

[0049] Please refer to Figure 2 , Figure 2It is a hardware block diagram of a remote communication substation device provided by an embodiment of the utility model. In some implementations of this embodiment, the remote communication substation device also includes a switch chip 10 connected to the MCU chip 4, and the Ethernet interface circuit 6 and the optical fiber transceiver interface circuit 7 are connected to the MCU chip 4 via the switch chip 10 respectively.

[0050] In detail, the Ethernet interface circuit 6 includes RJ4511 and a network port transformer 12 , one end of the RJ4511 is connected to the main control module 3 , the other end of the RJ4511 is connected to one end of the network port transformer 12 , and the other end of the network port transformer 12 is connected to the switch chip 10 .

[0051] Specifically, the optical fiber transceiver interface circuit 7 converts the optical signal into an electrical signal and connects to the switch chip 10 , and the Ethernet signal is connected to the switch chip 10 via the RJ4511 through the network port transformer 12 .

[0052] In some implementations of this embodiment, an MDIO bus is provided between the MCU chip 4 and the switch chip 10. The MCU chip 4 manages access to the switch chip 10 through the MDIO bus.

[0053] In some implementations of this embodiment, the multiple internal interface circuits 5 include an RS485 internal communication interface circuit 19, an RS422 internal communication interface circuit 20 and an internal 100M network circuit 21, and the RS485 internal communication interface circuit 19, the RS422 internal communication interface circuit 20 and the internal 100M network circuit 21 are respectively connected to the MCU chip 4.

[0054] Specifically, the remote communication substation device communicates with the IO module 2 through the IO module base plate 1. The communication method between the remote communication substation device and the IO module 2 can utilize a variety of internal interface circuits 5, which include an internal 100M network circuit 21, two RS422 internal communication interface circuits 20, and two RS485 internal communication interface circuits 19. The internal interface circuits 5 mainly communicate with other IO modules 2 on the IO module base plate 1. Among them, the MCU chip 4 leads to 4-way UART serial bus, two of which are connected to the internal base plate 485 bus through the TTL to 485 chip, and one is connected to the base plate 422 bus through the TTL to 422 chip. The MCU monitors the communication status of each bus and drives the external indicator light.

[0055] Among them, the remote communication substation device communicates with the IO module 2 through the IO module base plate 1 mainly through the RS485, RS422 and other serial buses to communicate with the IO module 2, of which the RS485 serial bus is a two-way redundant bus. The internal 100M network is a backup. The internal serial bus baud rate is fixed and cannot be adjusted.

[0056] In some implementations of the present embodiment, the RS485 external communication interface circuit 8 includes a first isolation chip 13, a 485 signal conversion chip 14 and an RS485 external interface 15, one end of the first isolation chip 13 is connected to the MCU chip 4, the other end of the first isolation chip 13 is connected to one end of the 485 signal conversion chip 14, and the other end of the 485 signal conversion chip 14 is connected to the RS485 external interface 15.

[0057] The 485 signal conversion chip 14 is a TTL to 485 chip. Specifically, two UART serial buses derived from the MCU chip 4 are connected to the RS485 external interface 15 through the first isolation chip 13 and the TTL to 485 chip.

[0058] In some implementations of this embodiment, the CAN communication interface circuit 9 includes a second isolation chip 16, a CAN signal conversion chip 17 and a CAN interface 18, one end of the second isolation chip 16 is connected to the MCU chip 4, and the other end of the second isolation chip 16 is connected to one end of the CAN signal conversion chip 17.

[0059] The other end of the CAN signal conversion chip 17 is connected to the CAN interface 18.

[0060] The CAN signal conversion chip 17 is a TTL to CAN chip. Specifically, two UART serial buses derived from the MCU chip 4 are connected to the CAN interface 18 through the second isolation chip 16 and the TTL to CAN chip.

[0061] Please refer to Figure 3 , Figure 3 This is an application diagram of a remote communication substation device provided by an embodiment of the utility model. In some implementations of this embodiment, the Ethernet interface circuit 6, the optical fiber transceiver interface circuit 7, the RS485 external communication interface circuit 8 and the CAN communication interface circuit 9 are all two-way.

[0062] In some implementations of this embodiment, the main control module 3 and two remote communication substation devices form a ring network.

[0063] In some implementations of the present embodiment, one Ethernet interface circuit 6 of any remote communication substation device is connected to the main control module 3, another Ethernet interface circuit 6 of the remote communication substation device is connected to one Ethernet interface circuit 6 of another remote communication substation device, and another Ethernet interface circuit 6 of another remote communication substation device is connected to the main control module 3.

[0064] In some implementations of the present embodiment, one of the fiber optic transceiver interface circuits 7 of any remote communication substation device is connected to the main control module 3, another fiber optic transceiver interface circuit 7 of the remote communication substation device is connected to one of the fiber optic transceiver interface circuits 7 of another remote communication substation device, and another fiber optic transceiver interface circuit 7 of another remote communication substation device is connected to the main control module 3.

[0065] Specifically, the remote communication substation device mainly includes two Ethernet interface circuits 6, two optical fiber transceiver interface circuits 7, two RS485 external communication interface circuits 8 (baud rate adjustable) and two CAN communication interface circuits 9 (baud rate adjustable). The Ethernet interface circuit 6 of the remote communication substation device can form a ring network with the main control module 3 and the Ethernet interface circuits 6 of other remote communication substation devices. The optical fiber transceiver interface circuit 7 of the remote communication substation device can form a ring network with the main control module 3 and the optical fiber transceiver interface circuits 7 of other remote communication substation devices.

[0066] In some implementations of this embodiment, a cross-communication method is adopted, and the cross-communication method is: when the fiber optic transceiver interface circuit 7 of any remote communication sub-station device communicates with the main control module 3, the Ethernet interface circuit 6 of the remote communication sub-station device communicates with another remote communication sub-station device; when the Ethernet interface circuit 6 of any remote communication sub-station device communicates with the main control module 3, the fiber optic transceiver interface circuit 7 of the remote communication sub-station device communicates with another remote communication sub-station device.

[0067] Specifically, the remote communication substation device can use an Ethernet port and an optical fiber network port for cross communication. Cross communication means that one end uses optical fiber or network cable to communicate with the main control module 3, and the other port uses network cable or optical fiber to communicate with other remote communication substation devices.

[0068] In some implementations of this embodiment, the RS485 external communication interface circuit 8 is connected to the RS485 communication interface of the external device 22 .

[0069] Specifically, the RS485 external interface 15 of the two-way RS485 external communication interface circuit 8 of the remote communication substation device can communicate with the external device 22 as a master station or a slave station, and its baud rate can be adjusted according to the needs of the external device 22.

[0070] In some implementations of this embodiment, the CAN communication interface circuit 9 is connected to a CAN communication interface of the external device 22 .

[0071] Specifically, the CAN interface 18 of the two-way CAN communication interface circuit 9 of the remote communication substation device can communicate with the external device 22 as a master station or a slave station, and its baud rate can be adjusted according to the needs of the external device 22.

[0072] Figure 4 This is a communication flow chart of a remote communication substation device provided by an embodiment of the utility model, such as Figure 4 As shown, the communication process between the main control module 3 and the remote communication substation device is as follows:

[0073] Step 1: When the main controller of the main control module 3 communicates with the remote communication substation device, it sends a set of data to the two ring networks at the same time;

[0074] Step 2: After receiving the data, the remote communication substation device forwards it to the IO module 2 via the backplane bus;

[0075] Step 3: After receiving and processing the data, the IO module 2 sends the data to the remote communication substation device through the backplane bus;

[0076] Step 4: After receiving the data sent by IO module 2, the remote communication substation device forwards the data to the two ring networks;

[0077] Step 5: The main controller of the main control module 3 receives and processes the ring network data, and the standby controller receives but does not process the data.

[0078] Specifically, execute step 1. When the main controller of the main control module 3 communicates with the remote communication substation device, it sends data to the backup controller and the remote communication substation device respectively. The data usually refers to various data in the field of industrial control. Execute step 2. The remote communication substation device only receives but does not process data, and forwards the data to the IO module 2 through the backplane bus. The backplane bus specifically refers to a serial bus such as 485. Execute step 3. After the IO module 2 processes the data received or output at the industrial control site, it replies the real-time response data to the remote communication substation device. Execute step 4. After the remote communication substation device receives the data from the IO module 2 through the backplane bus, it forwards it to the two ring networks. Execute step 5. The main controller of the main control module 3 receives the real-time data returned by the IO module 2, verifies whether the returned information is correct, and determines whether the communication status is normal. The backup controller only receives but does not process data.

[0079] The optional implementation modes of the embodiments of the utility model are described in detail above in conjunction with the accompanying drawings. However, the embodiments of the utility model are not limited to the specific details in the above implementation modes. Within the technical concept of the embodiments of the utility model, the technical scheme of the embodiments of the utility model can be subjected to various simple modifications, and these simple modifications all belong to the protection scope of the embodiments of the utility model.

[0080] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the embodiments of the utility model will not further describe various possible combinations.

[0081] In addition, various implementations of the embodiments of the present utility model can also be arbitrarily combined, as long as they do not violate the concept of the embodiments of the present utility model, they should also be regarded as the contents disclosed in the embodiments of the present utility model.

Claims

1. A remote communication substation device, characterized in that: The remote communication substation device is arranged on an IO module base plate, and at least one IO module is arranged on the IO module base plate. The remote communication substation device communicates with each of the IO modules through the IO module base plate, and the remote communication substation device is communicatively connected with a main control module; The remote communication substation device includes an MCU chip, multiple external communication interface circuits and multiple internal interface circuits, each external communication interface circuit is connected to the MCU chip and the main control module at the same time, and each internal interface circuit is connected to the MCU chip and the IO module baseboard at the same time; Among them, the multiple external communication interface circuits include Ethernet interface circuit, optical fiber transceiver interface circuit, RS485 external communication interface circuit and CAN communication interface circuit.

2. The remote communication substation device according to claim 1, characterized in that: It also includes a switch chip connected to the MCU chip, and the Ethernet interface circuit and the optical fiber transceiver interface circuit are respectively connected to the MCU chip via the switch chip.

3. The remote communication substation device according to claim 2, characterized in that: The Ethernet interface circuit includes RJ45 and a network port transformer, one end of the RJ45 is connected to the main control module, the other end of the RJ45 is connected to one end of the network port transformer, and the other end of the network port transformer is connected to the switch chip.

4. The remote communication substation device according to claim 1, characterized in that: The RS485 external communication interface circuit includes a first isolation chip, a 485 signal conversion chip and an RS485 external interface, one end of the first isolation chip is connected to the MCU chip, the other end of the first isolation chip is connected to one end of the 485 signal conversion chip, and the other end of the 485 signal conversion chip is connected to the RS485 external interface.

5. The remote communication substation device according to claim 1, characterized in that: The CAN communication interface circuit includes a second isolation chip, a CAN signal conversion chip and a CAN interface, one end of the second isolation chip is connected to the MCU chip, the other end of the second isolation chip is connected to one end of the CAN signal conversion chip, and the other end of the CAN signal conversion chip is connected to the CAN interface.

6. The remote communication substation device according to claim 2, characterized in that: An MDIO bus is arranged between the MCU chip and the switch chip.

7. The remote communication substation device according to claim 1, characterized in that: The multiple internal interface circuits include an RS485 internal communication interface circuit, an RS422 internal communication interface circuit and an internal 100M network circuit. The RS485 internal communication interface circuit, the RS422 internal communication interface circuit and the internal 100M network circuit are respectively connected to the MCU chip.

8. The remote communication substation device according to claim 1, characterized in that: The Ethernet interface circuit, the optical fiber transceiver interface circuit, the RS485 external communication interface circuit and the CAN communication interface circuit are all two-way.

9. The remote communication substation device according to claim 8, characterized in that: The main control module and two remote communication substation devices form a ring network.

10. The remote communication substation device according to claim 9, characterized in that: One Ethernet interface circuit of any remote communication substation device is connected to the main control module, another Ethernet interface circuit of the remote communication substation device is connected to one Ethernet interface circuit of another remote communication substation device, and another Ethernet interface circuit of another remote communication substation device is connected to the main control module.

11. The remote communication substation device according to claim 10, characterized in that: One of the fiber optic transceiver interface circuits of any remote communication substation device is connected to the main control module, another fiber optic transceiver interface circuit of the remote communication substation device is connected to one of the fiber optic transceiver interface circuits of another remote communication substation device, and another fiber optic transceiver interface circuit of another remote communication substation device is connected to the main control module.

12. The remote communication substation device according to claim 11, characterized in that: A cross communication method is adopted, and the cross communication method is: When the optical fiber transceiver interface circuit of any remote communication substation device communicates with the main control module, the Ethernet interface circuit of the remote communication substation device communicates with another remote communication substation device; When the Ethernet interface circuit of any remote communication substation device communicates with the main control module, the optical fiber transceiver interface circuit of the remote communication substation device communicates with another remote communication substation device.

13. The remote communication substation device according to claim 1, characterized in that: The RS485 external communication interface circuit is connected to the RS485 communication interface of the external device.

14. The remote communication substation device according to claim 1, characterized in that: The CAN communication interface circuit is connected to a CAN communication interface of an external device.

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