Integrated control board card and system based on master-slave protocol
By adopting integrated control boards and systems based on master-slave protocols in industrial automation control systems, the problems of engineering volume, power consumption and thermal design complexity in multi-CPU systems are solved, and the effects of simplifying communication design, enhancing system scalability and reducing power consumption are achieved.
Patent Information
- Application Number
- CN202421705256.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-17
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-07-17
AI Technical Summary
In existing industrial automation control systems, the control board that works in multiple CPUs together increases response speed and task parallel processing capabilities, while also leading to additional engineering volume, power consumption and complexity of thermal design.
The integrated control board and system based on the master-slave protocol is adopted. Through the combination of power module, main control module, signal transmission module and network module, communication between the upper computer as the main station and the integrated control board as the slave station is realized, simplifying the communication hardware design and enhancing the system expansion.
This solution simplifies the communication hardware design between different levels, enhances system scalability, reduces deployment project volume, and is conducive to the heat dissipation of the board and reduces overall power consumption.
Smart Images
Figure CN222994847U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of industrial automation control, in particular to an integrated control board card and system based on a master-slave protocol. Background Art
[0002] In an industrial automation control system, a common control board card is used to achieve the automatic control of multiple devices. With the growth of process requirements, both the number of devices that the board card needs to connect and the number of control parameters required by a single device show an upward trend, and the board card needs to have sufficient performance.
[0003] Currently, the control board cards of the prior art often adopt multiple CPUs to work together to improve the response speed and task parallel processing ability. However, the communication, task allocation, data synchronization, etc. between the deployed multiple CPUs all require additional engineering work. Each CPU will consume electric energy and generate heat. Therefore, a multi-CPU system may cause a significant increase in the overall power consumption and put forward higher requirements for the heat dissipation design. Therefore, there is an urgent need for a new type of integrated control board card and system based on a master-slave protocol to improve the above problems. Summary of the Utility Model
[0004] The purpose of the utility model is to provide an integrated control board card and system based on a master-slave protocol, and the control board card is used to simplify the communication hardware design between different levels.
[0005] In a first aspect, the utility model provides an integrated control board card based on a master-slave protocol, including: a power supply module, a main control module, a signal transmission module and a network module; the power supply module is used to output direct current with a preset voltage to the main control module; the main control module includes a reset unit and a clock unit; the reset unit is used to trigger the reset state of the main control module, and the clock unit is used to provide a clock signal for the main control module; the signal transmission module is connected with an opto-coupling module and a relay module; the opto-coupling module is connected to the input port of the main control module and is used to input an opto-coupled signal to the main control module; the relay module is connected to the output port of the main control module and is used to obtain an original output signal from the main control module; the signal transmission module is used to communicate with external devices; one end of the network module is connected with an interface module, and the other end is used to connect to a host computer, and the interface module is electrically connected to the main control module; the communication between the main control module and the host computer satisfies the master-slave protocol; the master-slave protocol defines the host computer as the master station and the main control module as the slave station.
[0006] The beneficial effects of the present utility model are as follows: The present utility model adopts a master-slave communication mode. The upper computer serves as the master station, which can actively initiate inquiries and receive responses, while the integrated control board serves as the slave station and responds according to the master-slave protocol. This architecture not only simplifies the communication hardware design between different levels but also enhances the system scalability, allowing the master station to easily access more external devices to form a distributed control system. The board does not require multiple CPUs, which is beneficial for reducing the deployment workload and for the heat dissipation of the board.
[0007] Optionally, the power supply module includes a diode and a buck converter; the diode is used to rectify the externally input voltage; the buck converter is used to convert the rectified voltage to a preset voltage.
[0008] Optionally, the optocoupler module includes an optocoupler and a resistor; one end of the resistor is connected to the input signal line, and the other end is connected to the optocoupler; the optocoupler is used to convert the input signal from an electrical signal into an optical signal and convert the optical signal into an electrical signal for output.
[0009] Optionally, the optocoupler includes a light-emitting diode and a photosensitive triode; the light-emitting diode and the photosensitive triode are encapsulated in a transparent medium, and the transparent medium between the light-emitting diode and the photosensitive triode is used to form an isolation channel; the change in the current of the light-emitting diode is used to control the conduction degree of the photosensitive triode, thereby realizing the optoelectronic isolation and amplification of the signal.
[0010] Optionally, the network module includes a transformer, signal electrodes, and an indicator light interface; the signal electrodes are used to transmit electrical signals; the transformer is used to couple differential signals to enhance the anti-interference ability of the network module; the indicator light interface is used to connect a status indicator light.
[0011] Optionally, it further includes an interface module. Both the network module and the main control module are electrically connected to the interface module; the interface module includes a physical layer transceiver and a crystal oscillator; the crystal oscillator is connected to the physical layer transceiver and is used to provide a physical layer clock signal; the physical layer transceiver is used to convert the digital signal processed by the upper layer protocol into a physical signal transmitted on the transmission medium and to restore the received physical signal to a digital signal.
[0012] Optionally, the relay module is provided with a logic gate chip and an output indicator light that are electrically connected; the logic gate chip is used to convert the input signal into an output signal, and the output indicator light is used to display the status of the output signal.
[0013] In a second aspect, the present utility model provides a control system based on a master-slave protocol for the integrated control board according to any one of the first aspect, and further includes the upper computer and at least one of the external devices.
[0014] Optionally, the external device includes at least one of a temperature sensor, a current meter, a frequency converter, a programmable logic controller, and a signal lamp.
[0015] Optionally, the communication standard adopted between the main control module and the host computer satisfies at least one of the serial communication standard and the Ethernet communication standard.
[0016] Optionally, the host computer is used for data conversion, alarm processing, and data storage according to signals.
[0017] Optionally, the interaction end of the host computer is provided with a visual interface for real-time display of data, operation of devices, and monitoring of system status. Description of the Drawings
[0018] Figure 1 It is a schematic structural diagram of an integrated control board based on a master-slave protocol provided by the present utility model;
[0019] Figure 2 It is a schematic structural diagram of a power supply module provided by the present utility model;
[0020] Figure 3 It is a schematic structural diagram of a main control module provided by the present utility model;
[0021] Figure 4 It is a schematic structural diagram of an opto-coupler module provided by the present utility model;
[0022] Figure 5 It is a schematic structural diagram of a network module provided by the present utility model;
[0023] Figure 6 It is a schematic structural diagram of a relay module provided by the present utility model;
[0024] Figure 7 It is a schematic structural diagram of a signal transmission module provided by the present utility model;
[0025] Figure 8 It is a schematic diagram of the connection relationship between a board and a tower lamp provided by the present utility model;
[0026] Figure 9 It is a schematic structural diagram of an integrated control system provided by the present utility model. Detailed Embodiments
[0027] To make the objectives, technical solutions and advantages of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model. Unless otherwise defined, the technical terms or scientific terms used herein shall have the ordinary meanings understood by those of ordinary skill in the art to which the present utility model pertains. The words such as "including" used herein are intended to mean that the elements or items appearing before this word cover the elements or items listed after this word and their equivalents, without excluding other elements or items.
[0028] Regarding the problems existing in the prior art, such as Figure 1 As shown, the first embodiment provides an integrated control board based on a master-slave protocol, including: a power supply module 100, a main control module 200, a signal transmission module 300, and a network module 500; the power supply module 100 is used to output direct current with a preset voltage to the main control module 200; the main control module 200 includes a reset unit 204 and a clock unit 203; the reset unit 204 is used to trigger the reset state of the main control module 200, and the clock unit 203 is used to provide a clock signal for the main control module 200; the signal transmission module 300 is connected to an optical coupling module 600 and a relay module 700; the optical coupling module 600 is connected to the input port 201 of the main control module 200 and is used to input an optical coupling signal to the main control module 200; the relay module 700 is connected to the output port 202 of the main control module 200 and is used to obtain the original output signal from the main control module 200; the signal transmission module 300 is used to communicate with an external device 801; one end of the network module 500 is connected to an interface module 400, and the other end is used to connect to a host computer 802, and the interface module 400 is electrically connected to the main control module 200; the communication between the main control module 200 and the host computer 802 satisfies the master-slave protocol; the master-slave protocol defines the host computer 802 as the master station and the main control module 200 as the slave station.
[0029] Specifically, the power supply module 100, the main control module 200, the signal transmission module 300, the interface module 400, the network module 500, the optical coupling module 600, and the relay module 700 are all integrated on a board 900.
[0030] The beneficial effects of the present utility model are as follows: The present utility model adopts a master-slave communication mode. The upper computer 802 serves as the master station, which can actively initiate inquiries and receive responses, while the integrated control board 900 serves as the slave station and responds according to the master-slave protocol. This architecture not only simplifies the communication hardware design between different levels but also enhances the system scalability, allowing more slave devices to be easily connected to form a distributed control system. There is no need to set multiple CPUs, which is beneficial to reducing the deployment workload and is beneficial to the heat dissipation of the board 900.
[0031] As Figure 2 shown, in some embodiments, the power supply module 100 includes a diode and a buck converter; the diode is used to rectify the externally input voltage; the buck converter is used to convert the rectified voltage to a preset voltage. Exemplarily, the preset voltage is set to 3.3V and the externally input voltage is set to 24V.
[0032] Specifically, the input end CN1 of the power supply module 100 is defined with 3 terminals, namely the positive terminal V+, the negative terminal GND, and the grounding terminal PE. The positive terminal V+ and the negative terminal GND are used to access direct current to form a power supply loop, and the grounding terminal PE is used to provide overall grounding for the board 900 to form a grounding loop. The positive terminal V+ is connected in series with the fuse FJ and the rectifier diode D5.
[0033] Exemplarily, the maximum current of the fuse FJ is configured to be 2A. The conduction direction of the rectifier diode D5 is from the positive terminal V+ to the positive output terminal; the positive output terminal is used to provide 24V direct current for the board 900. The positive output terminal is connected in series with the buck converter, which is used to convert 24V direct current into 3.3V direct current.
[0034] As Figure 3 shown, exemplarily, the main control module 200 further includes a microcontroller U2D, electrically connected to a clock unit 203 and a reset unit 204. The reset unit 204 includes several resistors and capacitors. The 3.3V direct current is sequentially connected in series with the resistor R11, the capacitor C8, and the negative terminal GND. The reset node between the resistor R11 and the capacitor C8 is connected to the reset output pin NRST of the microcontroller U2D. After the 3.3V direct current is powered on, the controller U2D enters the reset state, and the capacitor C8 starts to charge. When its voltage reaches a certain threshold, the reset output pin NRST becomes high level through the resistor R11, thereby releasing the reset state of the microcontroller U2D.
[0035] In another example, the clock unit 203 includes a crystal oscillator. The crystal oscillator has four pins, which are respectively marked as XO, G2, G1, and X1. Among them, X1 is the input terminal of the crystal, XO is the output terminal of the crystal, the first gate G1 of the crystal and the second gate G2 of the crystal are both connected to the negative terminal GND. The input terminal XI of the crystal and the output terminal XO of the crystal are respectively connected to the pins PH0 and PH1 of the microcontroller U2D. The input terminal XI of the crystal is connected to the negative terminal GND through the capacitor C12, and the output terminal XO of the crystal is connected to the negative terminal GND through the capacitor C11.
[0036] In yet another example, the 3.3V DC power is also connected to the power status detection output terminal PDR_ON of the microcontroller U2D, which is used to indicate whether the power supply has been turned on. The negative terminal GND is connected in series with the start selection pin BOOT0 / VPP of the microcontroller U2D through the resistor R12. In this example, the microcontroller U2D will execute the code starting from the default address in the internal flash memory after power-on.
[0037] In still another example, the microcontroller U2D is also provided with a first capacitor connection port VCAP_1 and a first capacitor connection port VCAP_2. The first capacitor connection port VCAP_1 is connected in series with the capacitor C9 and the negative terminal GND, and the second capacitor connection port VCAP_2 is connected in series with the capacitor C10 and the negative terminal GND, which is used to provide additional energy storage or filtering functions.
[0038] As Figure 4 shown, in some embodiments, the optical coupling module 600 includes an optocoupler and a resistor; one end of the resistor is connected to the input signal line, and the other end is connected to the optocoupler; the optocoupler is used to convert the input signal from an electrical signal into an optical signal and convert the optical signal into an electrical signal for output.
[0039] In some embodiments, the optocoupler includes a light-emitting diode and a photosensitive triode; the light-emitting diode and the photosensitive triode are encapsulated in a transparent medium, and the transparent medium between the light-emitting diode and the photosensitive triode is used to form an isolation channel; the current change of the light-emitting diode is used to control the conduction degree of the photosensitive triode, so as to realize the optoelectronic isolation and amplification of the signal.
[0040] Specifically, the optocoupler U5 includes 4 identical optocoupling groups. Each optocoupling group includes 2 light-emitting diodes and 1 photosensitive triode connected end to end. The connection nodes A and K of the light-emitting diodes are used to form an input loop. The connection node A is connected to the 24-channel input terminal (24_IN), and the connection node K is connected to the 24-channel input terminal (24_IN) through a 470Ω resistor. The connection node K is also connected to the input pin PIN_IN through the resistor bank RP1. The collector C of the photosensitive triode is connected to 3.3V DC through a series resistor; the collector C is also connected to the input terminal 201 of the microcontroller. The emitter of the photosensitive triode is connected to the negative terminal GND.
[0041] As Figure 5 shown, in some embodiments, the network module 500 includes a transformer, signal electrodes, and an indicator light interface; the signal electrodes are used to transmit electrical signals; the transformer is used to couple differential signals to enhance the anti-interference ability of the network module 500; the indicator light interface is used to connect the status indicator light.
[0042] Specifically, the network module 500 includes an Ethernet connector U3; the transformer is set as the current transformer in the Ethernet connector. The two output terminals CT of the current transformer are connected to the negative terminal GND through capacitors C28 and C32. The signal electrodes include the negative pole TPRX- for receiving data signals, the positive pole TPRX+ for receiving data signals, the negative pole TPTX- for sending data signals, and the positive pole TPTX+ for sending data signals.
[0043] In some other specific embodiments, the Ethernet connector U3 further includes a link status indicator light LINK LED and a transmission rate indicator light SPEED LED. Exemplarily, the link status indicator light LINK LED is yellow when lit, and the transmission rate indicator light SPEED LED is green when lit. One end of the above link status indicator light LINK LED is connected to the negative terminal GND through a resistor R24. One end of the above transmission rate indicator light SPEED LED is connected to the negative terminal GND through a resistor R25.
[0044] In some embodiments, an interface module 400 is further included. Both the network module 500 and the main control module 200 are electrically connected to the interface module 400; the interface module 400 includes a physical layer transceiver and a crystal oscillator; the crystal oscillator is connected to the physical layer transceiver and is used to provide a physical layer clock signal; the physical layer transceiver is used to convert the digital signal processed by the upper layer protocol into a physical signal transmitted on the transmission medium, and to restore the received physical signal to a digital signal.
[0045] Specifically, the pin configuration of the physical layer transceiver U4 includes: pin VDD1A is connected to the first working power supply of 3.3V and capacitor C31, and the other end of capacitor C31 is connected to the negative terminal GND. Pin VDD2A is connected to the second working power supply of 3.3V and capacitor C27, and the other end of capacitor C27 is connected to the negative terminal GND. Pin VDDIO is connected to the IO power supply of 3.3V and capacitor C35, and the other end of capacitor C35 is connected to the negative terminal GND. The internal logic power supply pin VDDCR is connected to the negative terminal GND through the parallel capacitors C33 and C34.
[0046] Pin LED2 / nINTSEL is connected to the negative terminal GND through resistor R16 and is used to control the transmission rate indicator SPEED LED. Pin LED1 / REGOFF is connected to the negative terminal GND through resistor R18 and is used to control the connection status indicator LINK LED. Pin RBIAS is connected to the negative terminal GND through resistor R15 and is used to set the bias current of the transmission rate indicator SPEED LED and the connection status indicator LINK LED.
[0047] Pin EP is connected to the negative terminal GND and is used to connect the external device 801. Pin RXP is connected to 3.3V through R17 and serves as the input terminal for receiving data. Pin RXN is connected to 3.3V through R19 and serves as the output terminal for receiving data. Pin TXP is connected to 3.3V through R20 and serves as the output terminal for sending data. Pin TXP is connected to 3.3V through R21 and serves as the output terminal for sending data.
[0048] Pin XTAL1 / CLKIN is connected to the external clock source. The structure of the external clock source is the same as that of the above clock unit 203 and will not be elaborated here. Pin XTAL2 / CLKOUT is connected to the external clock source and is used to output the external clock signal.
[0049] Pins RMII RXD0 and RMII RXD1 are used to connect to the input terminal of Ethernet data. Pins RMII RXD0 and RMII RXD1 are used to connect to the output terminal of Ethernet data. Pin RXER / PHYAD0 is the input terminal for receiving error signals. Pin RXDV / MDIO is the input terminal for receiving data valid signals. Pin CRS_DV / MODE2 is the input terminal for receiving data valid signals.
[0050] The pin TXEN is the output terminal of the transmit enable signal. The pin MDIO is the management data input terminal. The pin MDC is the management data clock input terminal. The pin nINT / REFCLKO is the output terminal of the interrupt request signal. The pin REF_CLKO is the output terminal of the reference clock signal. The pin ETH RESET is the input terminal of the Ethernet reset signal. The pin nRST is the input terminal of the reset signal.
[0051] As Figure 6 shown, in some embodiments, the relay module 700 is provided to include a logic gate chip and an output indicator light that are electrically connected; the logic gate chip is used to convert an input signal into an output signal, and the output indicator light is used to display the state of the output signal.
[0052] Specifically, the logic gate chip U11 includes a light-emitting diode, an NPN-type triode, and a PNP-type triode. The anode of the light-emitting diode is pin 1 of the logic gate chip U11, and the cathode of the light-emitting diode is pin 2 of the logic gate chip U11. The collectors of the two triodes are connected to each other, the bases of the two triodes are connected to each other, the emitter of the NPN-type triode is pin 3, and the emitter of the PNP-type triode is pin 4.
[0053] Exemplarily, pin 1 is connected to the output pin PIN OUTPUT 1 through the resistor R78. Pin 2 is connected to the negative terminal GND. Pin 3 is connected to the external ground pin GND_OUT. Pin 4 is connected to the output pin IN OUTPUT 1, and pin 4 is also connected to the 24-way output terminal (24_OUT) through the resistor R74.
[0054] As Figure 7 shown, in some embodiments, the signal transmission module 300 can be set as a header socket P1, including 24 input pins (PIN_IN1 to PIN_IN24) and 16 output pins (PIN_OUTPUT1 to PIN_OUTPUT16). A logic switch circuit is provided inside the header socket, and multiplexing is used to convert 24-way inputs into 16-way output signals.
[0055] The second embodiment provides a control system based on a master-slave protocol for the integrated control board 900 described in any one of the above embodiments, and further includes the host computer 802 and at least one of the external devices 801.
[0056] In some embodiments, the external device 801 includes at least one of a temperature sensor, a current meter, a frequency converter, a programmable logic controller, and a signal lamp.
[0057] Specifically, the signal lamp can be set as a tower lamp connected to a semiconductor device. The host computer 802 sends a control signal to the board 900, and then the board 900 outputs an alarm signal to light up the corresponding signal lamp of the tower lamp. Exemplarily, the male head at the board end is connected to the board signal line, and the signal line of the board 900 is provided with a female connector. The female connector is plugged with a male connector, and the male connector is connected to the original wire of the tower lamp.
[0058] As Figure 8 shown, in another example, 8 independent sub-lines are set from the board 900 to the tower lamp, including 4 signal lines, 1 flashing control line, 1 buzzer line, and 2 power lines. The 4 signal lines are used to control whether the colored lights of different colors are lit. The flashing control line is used to control the flashing frequency of the lit colored lights. The buzzer line is used to control the buzzer to work. The power lines are used to supply power to the colored lights. The colors of the colored lights include but are not limited to red, yellow, green, and blue.
[0059] In some embodiments, the communication standard adopted between the main control module 200 and the host computer 802 satisfies at least one of the serial communication standard and the Ethernet communication standard. Exemplarily, the communication standard adopted between the main control module 200 and the host computer 802 satisfies the serial communication standard. In another example, the communication standard adopted between the main control module 200 and the host computer 802 satisfies the Ethernet communication standard. In yet another example, the communication standard adopted between the main control module 200 and the host computer 802 is the Modbus protocol.
[0060] In some embodiments, the host computer 802 is used for data conversion, alarm processing, and data storage according to signals. Exemplarily, the host computer 802 communicates with the lower computer or field devices (such as PLCs, frequency converters, intelligent meters, etc.) through an interface, receives various types of raw data signals, and performs real-time decoding, parsing, and conversion on them, converting them into data convenient for human-machine interface display, analysis, and decision-making. When the monitored data exceeds the preset range or an abnormal situation occurs, the host computer 802 is used to trigger an alarm mechanism, generate alarm information, and send a control signal to the board 900 to make the tower lamp light up for alarm to inform the operator. The host computer 802 is also used to save historical data, including real-time collected data, alarm event records, and device operation status records.
[0061] In some embodiments, the interaction end of the host computer 802 is provided with a visualization interface for real-time display of data, operation of devices, and monitoring of system status. Specifically, the interaction end of the host computer 802 is set as a display for displaying the visualization interface and real-time display of the status of the tower lamp and sensors.
[0062] As Figure 9As shown, in some other embodiments, the communication between the host computer and multiple cards is achieved through a switch. Exemplarily, the switch 803 includes a positive terminal L+, a negative terminal M, a ground terminal PE, and eight network ports (P1 - P8). The network port P1 can be connected to the host computer, and the network ports P2 - P5 can be connected to the Ethernet connectors U3 of different boards 900. In another example, the host computer and the Ethernet connector U3 can be connected to the network ports in any order, and the network ports P1 - P8 can all be set as RJ45.
[0063] Although the embodiments of the present invention have been described in detail above, it is obvious to those skilled in the art that various modifications and changes can be made to these embodiments. However, it should be understood that such modifications and changes are all within the scope and spirit of the present invention described in the claims. Moreover, the present invention described herein can have other embodiments and can be implemented or realized in various ways.
Claims
1. An integrated control board based on a master-slave protocol, characterized in that: include: Power module, main control module, signal transmission module and network module; The power supply module is used to output direct current of a preset voltage to the main control module; The main control module includes a reset unit and a clock unit; the reset unit is used to trigger the reset state of the main control module, and the clock unit is used to provide a clock signal for the main control module; The signal transmission module is connected with an optical coupling module and a relay module; the optical coupling module is connected to the input port of the main control module, and is used to input an optical coupling signal to the main control module; the relay module is connected to the output port of the main control module, and is used to obtain an original output signal from the main control module; the signal transmission module is used to communicate with an external device; One end of the network module is connected to an interface module, and the other end is used to connect to a host computer. The interface module is electrically connected to the main control module. The communication between the main control module and the host computer satisfies a master-slave protocol. The master-slave protocol defines that the host computer is a master station and the main control module is a slave station.
2. The board according to claim 1, characterized in that: The power module includes a diode and a buck converter; the diode is used to rectify an external input voltage; and the buck converter is used to convert the rectified voltage to a preset voltage.
3. The board according to claim 1, characterized in that: The optical coupling module includes a photoelectric coupler and a resistor; one end of the resistor is connected to the input signal line, and the other end is connected to the photoelectric coupler; the photoelectric coupler is used to convert the input signal from an electrical signal to an optical signal, and convert the optical signal to an electrical signal for output.
4. The board according to claim 3, characterized in that: The photoelectric coupler comprises a light emitting diode and a phototransistor; the light emitting diode and the phototransistor are encapsulated in a transparent medium, and the transparent medium between the light emitting diode and the phototransistor is used to form an isolation channel; The current variation of the light emitting diode is used to control the conduction degree of the phototransistor, thereby realizing photoelectric isolation and amplification of the signal.
5. The board according to claim 1, characterized in that: The network module includes a transformer, a signal electrode and an indicator light interface; The signal electrode is used to transmit electrical signals; the transformer is used to couple differential signals to enhance the anti-interference capability of the network module; and the indicator light interface is used to connect the status indicator light.
6. The board according to claim 1, characterized in that: It also includes an interface module, and the network module and the main control module are both electrically connected to the interface module; The interface module includes a physical layer transceiver and a crystal oscillator; The crystal oscillator is connected to the physical layer transceiver and is used to provide a physical layer clock signal; The physical layer transceiver is used to convert the digital signal processed by the upper layer protocol into a physical signal transmitted on the transmission medium, and to restore the received physical signal into a digital signal.
7. The board according to claim 1, characterized in that: The relay module is configured to include an electrically connected logic gate chip and an output indicator light; the logic gate chip is used to convert an input signal into an output signal, and the output indicator light is used to display the state of the output signal.
8. A control system based on a master-slave protocol, used for the integrated control board card according to any one of claims 1 to 7, characterized in that: It also includes the host computer and at least one of the external devices.
9. The control system according to claim 8, characterized in that: The external device includes at least one of a temperature sensor, a current meter, a frequency converter, a programmable logic controller and a signal lamp.
10. The control system according to claim 8, characterized in that: The communication standard adopted between the main control module and the host computer meets at least one of a serial port communication standard and an Ethernet communication standard.