Relay matrix switch system

Abstract

The utility model provides a relay matrix switch system, which is applied to the technical field of matrix switches and comprises a master control module, the master control module is connected with a communication module and controls a relay matrix module through a relay control module, and the relay matrix module is connected with an output port. The output port is connected with the main control module through the board card ID identification module, and the board card ID identification module is used for transmitting a board position signal of the output port to the main control module; the relay matrix module comprises a plurality of matrix switch units and a connector, the matrix switch units are connected with the output port through the connector, the connector is used for leading out matrix row and column signals of the relay matrix module, and each matrix switch unit comprises a plurality of relays connected in parallel. The scale of the matrix switch is effectively controlled, the scale is small, and the cost is low; the relay matrix module is connected with the output port through the connector, and the board-to-board connector is used for connection, so that the total length of a signal path can be reduced, and the bandwidth and the signal-to-noise ratio are effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of matrix switches, and in particular relates to a relay matrix switch system. Background Art

[0002] Relay matrix switches are widely used in automotive electronic automation test equipment. Their function is to control the opening and closing of circuits, realize different signal routing, and form flexible switching from test resources (instruments) to devices under test (DUT). Common standard matrix switches are generally based on PCI or PXI buses, and the switch network topology is generally fixed. For example, NI's PXI matrix switch PXIe-2739 has 256 crosspoints and its switch topology is 16×16.

[0003] The defects and shortcomings of the prior art include the following two points:

[0004] (1) The unit price of the relay matrix modules of the general PCI and PXI buses is very high, and they must be used with industrial computers with PCI or PXI interfaces, which undoubtedly increases the hardware cost and software development cost of the entire test system. In addition, general matrix switches generally have a scale of more than 128 crosspoints (8×16), while some simple test applications may only require 1×4 or 2×4 switches. If an 8×16 matrix switch is used, it will cause a serious waste of hardware resources.

[0005] (2) In a test system, the interfaces of the test resources (data acquisition card, signal generator, etc.), relay matrix module, and device under test (DUT) are different, and the signal paths are numerous, so it is often necessary to design a dedicated PCB to complete the signal transfer. Figure 1 In the traditional matrix switch shown, the test resource is connected to the transfer PCB, and the relay matrix module is connected to the transfer PCB. Each uses a standard cable provided by the manufacturer, with a cable length of about 1.5m. The cable length from the transfer PCB to the DUT fixture is about 1m, so the actual signal routing from the test resource to the DUT may have exceeded 4m. The overlong signal routing has a serious impact on the test signal bandwidth and signal-to-noise ratio. Utility Model Content

[0006] In view of the above problems in the prior art, the purpose of the utility model is to provide a relay matrix switch system, which can effectively control the scale of the matrix switch, is small in scale and low in cost; the connection between the relay matrix module and the output port is realized through a connector, and is connected using a board-to-board connector, which can reduce the total length of the signal path and effectively improve the bandwidth and signal-to-noise ratio.

[0007] A relay matrix switch system comprises a main control module, a communication module, a relay control module, a relay matrix module and a board card ID recognition module, wherein the main control module is connected to the communication module, the main control module controls the relay matrix module through the relay control module, the relay matrix module is connected to an output port, the output port is connected to the main control module through the board card ID recognition module, the board card ID recognition module is used for communication address decoding selection, and transmits a board position signal of the output port to the main control module;

[0008] The relay matrix module includes multiple matrix switch units and connectors. The matrix switch units are connected to the output port through the connector. The connector is used to lead out the matrix row and column signals of the relay matrix module. The matrix switch unit includes multiple parallel relays, and the on and off of the relays constitute a variety of matrix topological structures.

[0009] Preferably, the relay matrix module includes eight matrix switch units and a connector, the matrix switch unit includes four relays, the four relays are connected in parallel to form a 1:4 multiplexer, and the relays are double-pole double-throw relays.

[0010] Preferably, the main control module includes an MCU, and the communication module includes a CAN transceiver and an RS485 transceiver. The CAN transceiver is connected to the CAN communication port of the MCU, and the RS485 transceiver is connected to the UART communication port of the MCU. The CAN transceiver and RS485 transceiver are also connected to a communication control interface.

[0011] Preferably, the CAN transceiver includes a main control chip U4, the TXD pin and the RXD pin of the main control chip U4 are respectively connected to the CAN communication port of the MCU, the TXD pin of the main control chip U4 is also connected to a resistor R9, and the other end of the resistor R9 is connected to a voltage of one;

[0012] The VDD pin of the main control chip U4 is connected to voltage 2, and the VDD pin of the main control chip U4 is connected to capacitors C5 and C7 in parallel. The VIO pin of the main control chip U4 is connected to voltage 1, and the VIO pin of the main control chip U4 is also connected to capacitor C6. The other ends of the capacitors C5, C7, and C6 are all grounded.

[0013] Two TVS tubes D6 are connected in series between the CANH pin and the CANL pin of the main control chip U4, and the circuit between the two TVS tubes D6 is grounded; the S pin and the VSS pin of the main control chip U4 are both grounded.

[0014] Preferably, the RS485 transceiver includes a main control chip U5, a VCC pin of the main control chip U5 is connected to voltage 1, and the VCC pin of the main control chip U5 is also connected to capacitors C8 and C9 in parallel, and the other ends of the capacitors C8 and C9 are grounded;

[0015] The RO pin and the DI pin of the main control chip U5 are respectively connected to the UART communication port of the MCU, and the RO pin of the main control chip U5 is also connected to a resistor R11, and the other end of the resistor R11 is grounded. The DI pin of the main control chip U5 is connected to a resistor R14 and a diode D7 in parallel, and the other end of the resistor R14 and the positive electrode of the diode D7 are connected between the capacitor C10 and the gate of the MOS tube Q1, the other end of the capacitor C10 is grounded, the source of the MOS tube Q1 is grounded, and the collector is connected to the resistor R10, and the other end of the resistor R10 is connected to a voltage of one, and the RE pin of the main control chip U5 is connected to the DE pin and connected to the collector of the MOS tube Q1;

[0016] The B pin of the main control chip U5 is connected to a resistor R13 and a TVS tube D8 in parallel, and the other ends of the resistor R13 and the TVS tube D8 are grounded respectively. The A pin of the main control chip U5 is connected to a resistor R12 and a TVS tube D9 in parallel, and the other ends of the resistor R12 and the TVS tube D9 are grounded respectively.

[0017] Preferably, it further comprises a power supply module, wherein the power supply module comprises a DC / DC unit and a voltage stabilizing unit, wherein the DC / DC unit outputs voltage two and the voltage stabilizing unit outputs voltage one.

[0018] Preferably, the DC / DC unit includes a module power supply U1, the voltage stabilizing unit includes a voltage stabilizer U2, the VIN pin of the module power supply U1 is connected to a diode D1 and a capacitor C1 in parallel, the positive electrode of the diode D1 is connected to the input voltage, and the other end of the capacitor C1 is grounded;

[0019] The VO pin of the module power supply U1 is connected to the voltage regulator U2 through a filter, and the filter includes a capacitor C2, a capacitor C3 and a magnetic bead FB1. The VO pin of the module power supply U1 is connected with a capacitor C2 and a magnetic bead FB1 in parallel, the other end of the capacitor C2 is grounded, the other end of the magnetic bead FB1 outputs voltage two and is connected to pin three of the voltage regulator U2, pin one of the voltage regulator U2 is grounded, pin two and pin four of the voltage regulator U2 are connected and output voltage one, and capacitor C4 is also connected to pin two and pin four of the voltage regulator U2, the other end of the capacitor C4 is grounded, and capacitor C3 is connected between pin three and pin one of the voltage regulator U2.

[0020] Preferably, it also includes a backup relay control module, which is connected to the main control module and the output port and is used to control an external relay.

[0021] Preferably, the board card ID identification module includes port IN0, port IN1, port IN2, and port IN3. A diode D2 and a resistor R5 are connected in series between port IN0 of the board card ID identification module and the main control module, and a resistor R1 is also connected between the diode D2 and the resistor R5; a diode D3 and a resistor R6 are connected in series between port IN1 of the board card ID identification module and the main control module, and a resistor R2 is also connected between the diode D3 and the resistor R6; a diode D4 and a resistor R7 are connected in series between port IN2 of the board card ID identification module and the main control module, and a resistor R3 is also connected between the diode D4 and the resistor R7; a diode D5 and a resistor R8 are connected in series between port IN3 of the board card ID identification module and the main control module, and a resistor R4 is also connected between the diode D5 and the resistor R8, and the other ends of the resistors R1, R2, R3, and R4 are connected to voltage one.

[0022] Preferably, the main control module is connected to a host computer via a communication module, the host computer is used to generate a matrix switch topology netlist, and encapsulate instructions according to a board ID recognition module, the host computer transmits instructions to the main control module via the communication module, and the main control module controls the corresponding relay control module to drive the corresponding relay matrix module to operate.

[0023] The beneficial effect of the utility model is that the relay matrix switch system controls the on and off of four relays through a 1:4 multiplexer to form a matrix switch unit, and then forms a matrix switch system with 32 cross points through eight matrix switch units, which can effectively control the scale of the matrix switch, is small in scale, and has low cost.

[0024] The connection between the relay matrix module and the output port is realized through a connector and connected using a board-to-board connector, which can reduce the total length of the signal path and effectively improve the bandwidth and signal-to-noise ratio.

[0025] The communication module uses CAN transceiver and RS485 transceiver. Compared with PCI or PXI interface, CAN interface and UART interface have lower cost.

[0026] The communication address decoding is selected by using the board ID recognition module. The board ID recognition module provides a 4-bit ID, which includes 16 states, so that 16 relay matrix switch systems can be used in combination to form a composite system, which can expand the scale of the matrix switch and form a matrix switch composite system with 32*16=512 crosspoints. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0028] Figure 1 This is the block diagram of the traditional matrix switch;

[0029] Figure 2 This is a principle block diagram of the matrix switch system of the utility model;

[0030] Figure 3 It is a circuit diagram of the relay matrix module of the utility model;

[0031] Figure 4 It is a circuit diagram of the relay control module of the utility model;

[0032] Figure 5 It is a circuit diagram of the matrix switch unit of the utility model;

[0033] Figure 6 It is a circuit diagram of the power module of the utility model;

[0034] Figure 7 It is a circuit diagram of the board card ID recognition module of the utility model;

[0035] Figure 8 It is a circuit diagram of the CAN transceiver module of the utility model;

[0036] Fig. 9 It is a circuit diagram of the RS485 transceiver module of the utility model. DETAILED DESCRIPTION

[0037] Embodiment 1

[0038] like Figure 2 As shown, a relay matrix switch system includes a main control module, a communication module, a relay control module, a relay matrix module, a board ID recognition module and a power supply module.

[0039] like Figures 2 to 4 As shown, the main control module controls the relay matrix module through the relay control module, and the relay matrix module is connected to the output port. Figure 3 As shown, the relay matrix module includes multiple matrix switch units and connectors. The matrix switch units are connected to the output ports via connectors. The connectors are used to lead out matrix row and column signals of the relay matrix module. The matrix switch units include multiple relays connected in parallel. Various matrix topologies are formed by the on and off of the relays.

[0040] Further, such as Figure 3 , Figure 4 , Figure 5 As shown, the relay matrix module includes eight matrix switch units and a connector. The matrix switch unit includes four relays. The four relays are connected in parallel to form a 1:4 multiplexer. The relays are double-pole double-throw relays with a model of HFD4 / 5-SR.

[0041] Among them, Figure 3 As shown, R1~R4 represent the 1st to 4th rows, C1~C8 represent the 1st to 8th columns, and the common terminals and normally open terminals of all relays are led to the unified matrix row and column signal lead-out ports, i.e., connectors, which are connected to the output ports through connectors. Using board-to-board connectors to connect can reduce the total length of the signal path and effectively improve the bandwidth and signal-to-noise ratio. In this implementation, a 96-pin connector is used as the connector. Figure 4 As shown, the relay control module includes a main control chip U3, model ULN2803ADWR, which is used to drive the matrix switch.

[0042] Please refer to Figure 6 The power module includes a DC / DC unit and a voltage stabilizing unit, wherein the DC / DC unit outputs voltage two and the voltage stabilizing unit outputs voltage one.

[0043] Specifically, the DC / DC unit includes a module power supply U1, and the voltage stabilization unit includes a voltage stabilizer U2. The VIN pin of the module power supply U1 is connected to a diode D1 and a capacitor C1 in parallel, the positive electrode of the diode D1 is connected to the input voltage, and the other end of the capacitor C1 is grounded. The input voltage range is 8-36V, and can be connected to the commonly used industrial control voltage 12V or 24V. The input voltage connected in this embodiment is 24V.

[0044] The VO pin of the module power supply U1 is connected to the voltage regulator U2 through a filter, and the filter includes capacitor C2, capacitor C3 and magnetic bead FB1. The VO pin of the module power supply U1 is connected with capacitor C2 and magnetic bead FB1 in parallel. The other end of the capacitor C2 is grounded, and the other end of the magnetic bead FB1 outputs voltage two, which is 5V, and is connected to pin three of the voltage regulator U2. Pin one of the voltage regulator U2 is grounded, and pins two and four of the voltage regulator U2 are connected and output voltage one, which is 3.3V. Capacitor C4 is also connected to pins two and four of the voltage regulator U2, and the other end of capacitor C4 is grounded. Capacitor C3 is connected between pins three and one of the voltage regulator U2.

[0045] like Figure 2 , Figure 7 As shown, the output port is connected to the main control module through the board ID recognition module. The board ID recognition module is used for communication address decoding selection and transmits the board position signal of the output port to the main control module.

[0046] Please refer to Figure 7 The board card ID identification module includes port IN0, port IN1, port IN2, and port IN3. A diode D2 and a resistor R5 are connected in series between port IN0 of the board card ID identification module and the main control module, and a resistor R1 is also connected between the diode D2 and the resistor R5; a diode D3 and a resistor R6 are connected in series between port IN1 of the board card ID identification module and the main control module, and a resistor R2 is also connected between the diode D3 and the resistor R6; a diode D4 and a resistor R7 are connected in series between port IN2 of the board card ID identification module and the main control module, and a resistor R3 is also connected between the diode D4 and the resistor R7; a diode D5 and a resistor R8 are connected in series between port IN3 of the board card ID identification module and the main control module, and a resistor R4 is also connected between the diode D5 and the resistor R8, and the other ends of the resistors R1, R2, R3, and R4 are connected to voltage one. The communication address decoding is selected by using the board ID recognition module. The board ID recognition module provides a 4-bit ID, which includes 16 states, so that 16 relay matrix switch systems can be used in combination to form a composite system, which can expand the scale of the matrix switch and form a matrix switch composite system with 32*16=512 crosspoints.

[0047] like Figure 2 , Figure 8 , Fig. 9 As shown, the main control module is connected to the communication module, the main control module includes an MCU, the model of the MCU is STM32F072, the communication module includes a CAN transceiver and an RS485 transceiver, the CAN transceiver is connected to the CAN communication port of the MCU, the RS485 transceiver is connected to the UART communication port of the MCU, and the CAN transceiver and the RS485 transceiver are also connected to the communication control interface.

[0048] like Figure 8As shown, the CAN transceiver includes a main control chip U4, the model of the main control chip U4 is MCP2558FD, the TXD pin and the RXD pin of the main control chip U4 are respectively connected to the CAN communication port of the MCU, the TXD pin of the main control chip U4 is also connected to a resistor R9, and the other end of the resistor R9 is connected to voltage one; the VDD pin of the main control chip U4 is connected to voltage two, the VDD pin of the main control chip U4 is connected to capacitors C5 and C7 in parallel, the VIO pin of the main control chip U4 is connected to voltage one, the VIO pin of the main control chip U4 is also connected to a capacitor C6, and the other ends of the capacitors C5, C7, and C6 are all grounded; two TVS tubes D6 are connected in series between the CANH pin and the CANL pin of the main control chip U4, and the circuit between the two TVS tubes D6 is grounded; the S pin and the VSS pin of the main control chip U4 are both grounded.

[0049] like Fig. 9 As shown, the RS485 transceiver includes a main control chip U5, the model of the main control chip U5 is SP3485EEN, the VCC pin of the main control chip U5 is connected to voltage 1, and the VCC pin of the main control chip U5 is also connected to capacitors C8 and C9 in parallel, and the other ends of the capacitors C8 and C9 are grounded; the RO pin and the DI pin of the main control chip U5 are respectively connected to the UART communication port of the MCU, and the RO pin of the main control chip U5 is also connected to a resistor R11, and the other end of the resistor R11 is grounded, and the DI pin of the main control chip U5 is connected to a resistor R14 and a diode D7 in parallel, and the other end of the resistor R14 is grounded. The positive electrode of the diode D7 is connected between the capacitor C10 and the gate of the MOS tube Q1, the other end of the capacitor C10 is grounded, the source of the MOS tube Q1 is grounded, the collector is connected to the resistor R10, and the other end of the resistor R10 is connected to the voltage one, the RE pin of the main control chip U5 is connected to the DE pin and connected to the collector of the MOS tube Q1; the B pin of the main control chip U5 is connected to the parallel resistor R13 and the TVS tube D8, and the other ends of the resistor R13 and the TVS tube D8 are grounded respectively, and the A pin of the main control chip U5 is connected to the parallel resistor R12 and the TVS tube D9, and the other ends of the resistor R12 and the TVS tube D9 are grounded respectively.

[0050] In addition, the relay matrix switch system also includes a backup relay control module, which is connected to the main control module and the output port and is used to control external relays, that is, drive external relays to achieve different matrix switch combinations.

[0051] When the relay matrix switch system is used alone, a variety of relay matrix switch topologies can be formed by connecting external wires to the 96-pin connector. For example, by connecting all columns C1 to C8 in the relay matrix module in parallel, a 1×32 (1:32) multiplexer can be formed; by connecting each row signal R1 to R4 of the matrix switch unit separately, a 4×8 matrix switch can be formed. Similarly, there are many other combinations, and the combination method is very flexible.

[0052] Embodiment 2

[0053] The structure of this embodiment is basically the same as that of the first embodiment, except that the main control module of this embodiment is connected to the host computer through the communication module, the host computer is used to generate a matrix switch topology netlist, and encapsulate instructions according to the board ID recognition module, the host computer transmits instructions to the main control module through the communication module, and the main control module controls the corresponding relay control module to drive the corresponding relay matrix module to operate.

[0054] Specifically, the control software of the host computer (such as Labview) generates a matrix switch topology netlist according to actual needs, and encapsulates instructions according to the board ID recognition module. The instructions are sent to the corresponding relay matrix switch system through the CAN or RS485 interface. After receiving the instructions, the relay matrix switch system decodes and generates a control logic sequence to control the corresponding relay action in the relay matrix module. By using multiple relay matrix switch systems in combination, a more complex relay matrix switch topology can be achieved.

[0055] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A relay matrix switch system, characterized in that: It includes a main control module, a communication module, a relay control module, a relay matrix module and a board ID recognition module, wherein the main control module is connected to the communication module, the main control module controls the relay matrix module through the relay control module, the relay matrix module is connected to the output port, the output port is connected to the main control module through the board ID recognition module, and the board ID recognition module is used for communication address decoding selection and transmitting the board position signal of the output port to the main control module; The relay matrix module includes multiple matrix switch units and connectors. The matrix switch units are connected to the output port through the connector. The connector is used to lead out the matrix row and column signals of the relay matrix module. The matrix switch unit includes multiple parallel relays, and the on and off of the relays constitute a variety of matrix topological structures.

2. The relay matrix switch system according to claim 1, characterized in that: The relay matrix module includes eight matrix switch units and a connector. The matrix switch unit includes four relays. The four relays are connected in parallel to form a 1:4 multiplexer. The relays are double-pole double-throw relays.

3. The relay matrix switch system according to claim 1, characterized in that: The main control module includes an MCU, and the communication module includes a CAN transceiver and an RS485 transceiver. The CAN transceiver is connected to the CAN communication port of the MCU, and the RS485 transceiver is connected to the UART communication port of the MCU. The CAN transceiver and the RS485 transceiver are also connected to a communication control interface.

4. The relay matrix switch system according to claim 3, characterized in that: The CAN transceiver includes a main control chip U4, the TXD pin and the RXD pin of the main control chip U4 are respectively connected to the CAN communication port of the MCU, and the TXD pin of the main control chip U4 is also connected to a resistor R9, and the other end of the resistor R9 is connected to a voltage of one; The VDD pin of the main control chip U4 is connected to voltage 2, and the VDD pin of the main control chip U4 is connected to capacitors C5 and C7 in parallel. The VIO pin of the main control chip U4 is connected to voltage 1, and the VIO pin of the main control chip U4 is also connected to capacitor C6. The other ends of the capacitors C5, C7, and C6 are all grounded. Two TVS tubes D6 are connected in series between the CANH pin and the CANL pin of the main control chip U4, and the circuit between the two TVS tubes D6 is grounded; the S pin and the VSS pin of the main control chip U4 are both grounded.

5. The relay matrix switch system according to claim 3, characterized in that: The RS485 transceiver includes a main control chip U5, a VCC pin of the main control chip U5 is connected to voltage 1, and the VCC pin of the main control chip U5 is also connected to capacitors C8 and C9 in parallel, and the other ends of the capacitors C8 and C9 are grounded; The RO pin and the DI pin of the main control chip U5 are respectively connected to the UART communication port of the MCU, and the RO pin of the main control chip U5 is also connected to a resistor R11, and the other end of the resistor R11 is grounded. The DI pin of the main control chip U5 is connected to a resistor R14 and a diode D7 in parallel, and the other end of the resistor R14 and the positive electrode of the diode D7 are connected between the capacitor C10 and the gate of the MOS tube Q1, the other end of the capacitor C10 is grounded, the source of the MOS tube Q1 is grounded, and the collector is connected to the resistor R10, and the other end of the resistor R10 is connected to a voltage of one, and the RE pin of the main control chip U5 is connected to the DE pin and connected to the collector of the MOS tube Q1; The B pin of the main control chip U5 is connected to a resistor R13 and a TVS tube D8 in parallel, and the other ends of the resistor R13 and the TVS tube D8 are grounded respectively. The A pin of the main control chip U5 is connected to a resistor R12 and a TVS tube D9 in parallel, and the other ends of the resistor R12 and the TVS tube D9 are grounded respectively.

6. The relay matrix switch system according to claim 1, characterized in that: It also includes a power supply module, which includes a DC / DC unit and a voltage stabilizing unit. The DC / DC unit outputs voltage two, and the voltage stabilizing unit outputs voltage one.

7. The relay matrix switch system according to claim 6, characterized in that: The DC / DC unit includes a module power supply U1, and the voltage stabilizing unit includes a voltage stabilizer U2. The VIN pin of the module power supply U1 is connected to a diode D1 and a capacitor C1 in parallel, the positive electrode of the diode D1 is connected to the input voltage, and the other end of the capacitor C1 is grounded; The VO pin of the module power supply U1 is connected to the voltage regulator U2 through a filter, and the filter includes a capacitor C2, a capacitor C3 and a magnetic bead FB1. The VO pin of the module power supply U1 is connected with a capacitor C2 and a magnetic bead FB1 in parallel, the other end of the capacitor C2 is grounded, the other end of the magnetic bead FB1 outputs voltage two and is connected to pin three of the voltage regulator U2, pin one of the voltage regulator U2 is grounded, pin two and pin four of the voltage regulator U2 are connected and output voltage one, and capacitor C4 is also connected to pin two and pin four of the voltage regulator U2, the other end of the capacitor C4 is grounded, and capacitor C3 is connected between pin three and pin one of the voltage regulator U2.

8. The relay matrix switch system according to claim 1, characterized in that: It also includes a backup relay control module, which is connected to the main control module and the output port and is used to control an external relay.

9. The relay matrix switch system according to claim 1, characterized in that: The board card ID identification module includes port IN0, port IN1, port IN2, and port IN3. A diode D2 and a resistor R5 are connected in series between port IN0 of the board card ID identification module and the main control module, and a resistor R1 is also connected between the diode D2 and the resistor R5; a diode D3 and a resistor R6 are connected in series between port IN1 of the board card ID identification module and the main control module, and a resistor R2 is also connected between the diode D3 and the resistor R6; a diode D4 and a resistor R7 are connected in series between port IN2 of the board card ID identification module and the main control module, and a resistor R3 is also connected between the diode D4 and the resistor R7; a diode D5 and a resistor R8 are connected in series between port IN3 of the board card ID identification module and the main control module, and a resistor R4 is also connected between the diode D5 and the resistor R8, and the other ends of the resistors R1, R2, R3, and R4 are connected to voltage one.

10. The relay matrix switch system according to any one of claims 1 to 9, characterized in that: The main control module is connected to the host computer through the communication module. The host computer is used to generate a matrix switch topology netlist and encapsulate instructions according to the board ID recognition module. The host computer transmits instructions to the main control module through the communication module, and the main control module controls the corresponding relay control module to drive the corresponding relay matrix module to operate.

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