Power distribution control device and mainboard emergency control circuit

Abstract

The invention relates to the technical field of power distribution control, in particular to a power distribution control device and a mainboard emergency control circuit. A dial-up control module is connected with a main control module, a first output end of the main control module is connected with a first input end of a relay control module, and a second output end of the main control module is connected with a second input end of the relay control module; the second end of the dial control module is connected with the input end of the emergency control module, the first output end of the emergency control module is connected with the first input end of the relay control module, and the second output end of the emergency control module is connected with the second input end of the relay control module; the first output end of the relay control module is connected with the first end of the relay module, and the second output end of the relay control module is connected with the second end of the relay module. Switching between an automatic working state and a manual working state is achieved through the dial switch, it is ensured that the equipment state can be rapidly controlled under special conditions, and therefore the reliability and safety of the system are improved.

Description

Technical Field

[0001] The present application relates to the technical field of power distribution control, and in particular to a power distribution control device and a mainboard emergency control circuit. Background Art

[0002] Existing power supply systems generally use PLC-controlled contactors to achieve on / off control of electrical equipment. Such traditional contactors only have simple electrical switching functions and lack logic control and data processing capabilities, making it difficult to meet the needs of modern industry for intelligent and flexible control systems.

[0003] In some special cases or when the system fails, it is necessary to disconnect or restore the power supply urgently to ensure the normal operation of the system and the safety of personnel. However, the traditional contactor control method cannot meet such emergency needs and lacks independent control capabilities and rapid response mechanisms.

[0004] In view of the above problems, it is necessary to design a power supply control system that can realize efficient, intelligent and reliable power supply control system, ensure the safe operation of the system and guarantee the stable operation of the system when the main control board fails or other emergency situations occur. Summary of the invention

[0005] In order to overcome the shortcomings of the prior art, the present application provides a mainboard emergency control circuit, which realizes the switching of automatic and manual working states through a dip switch, ensuring that the device status can be quickly controlled under special circumstances, avoiding the system from being unable to start or shut down normally due to mainboard damage, thereby improving the reliability and safety of the system.

[0006] The technical solution adopted by this application to solve its technical problem is: In a first aspect, the present application provides a mainboard emergency control circuit, including: a dial control module, a main control module, a relay control module, an emergency control module and a relay module; The first end of the dial control module is connected to the input end of the main control module, the first output end of the main control module is connected to the first input end of the relay control module, and the second output end of the main control module is connected to the second input end of the relay control module, so as to control the output signal of the relay control module through the output signal of the main control module when the dial control module is controlled by the main control module; The second end of the dial control module is connected to the input end of the emergency control module, the first output end of the emergency control module is connected to the first input end of the relay control module, and the second output end of the emergency control module is connected to the second input end of the relay control module, so as to control the output signal of the relay control module through the output signal of the emergency control module when the emergency control module is turned on; The first output end of the relay control module is connected to the first end of the relay module, and the second output end of the relay control module is connected to the second end of the relay module, and is used to control the on and off of the relay module through the output signal of the relay control module.

[0007] Optionally, the dial control module includes a dial switch of model SS13D07L4B, a first resistor, and a second resistor; The input end of the main control module is connected to the first end of the dip switch through the first resistor, and the first end of the dip switch is also connected to an external automatic mode indicator light through the second resistor; The second end of the dip switch is connected to an external DC signal source; The fourth end of the dip switch is connected to the input end of the emergency control module.

[0008] Optionally, the emergency control module includes a first switch, a third resistor, a second switch and a fourth resistor; One end of the first switch is connected to the fourth end of the dip switch, and the other end is connected to the first input end of the relay control module through the third resistor; One end of the second switch is connected to the fourth end of the dip switch, and the other end is connected to the second input end of the relay control module through the fourth resistor.

[0009] Optionally, the relay control module includes a control chip of model MD7620; The first end of the control chip is connected to the first end of the relay module, the second end of the control chip is grounded, and the third end of the control chip is connected to the first switch through the third resistor; The fourth end of the control chip is connected to the second end of the relay module, the fifth end of the control chip is connected to the DC signal source, and the sixth end of the control chip is connected to the second switch through the fourth resistor.

[0010] Optionally, the relay control module further includes: a first diode and a second diode; The cathode of the first diode is connected to the third terminal of the control chip, and the anode of the second diode is connected to the first output terminal of the main control module; The cathode of the second diode is connected to the sixth terminal of the control chip, and the anode of the second diode is connected to the second output terminal of the main control module.

[0011] Optionally, the main control module includes a main control chip of model CH32F208W.

[0012] Optionally, it further includes: a first indication module and a second indication module; The input end of the first indication module is connected to the connection point between the first switch and the relay control module, and is used to control the indicator light in the first indication module to light up when the first switch is closed; The input end of the second indication module is connected to the connection point between the second switch and the relay control module, and is used to control the indicator light in the second indication module to light up when the second switch is closed.

[0013] Optionally, the relay module includes a first relay, a second relay and a third relay.

[0014] In a second aspect, the present application provides a power distribution control device, including: a main control circuit board, a sub-control circuit board and three relays; The main control circuit board is loaded with the above-mentioned main control module, and the auxiliary control circuit board is loaded with the above-mentioned dial control module, relay control module and emergency control module; The main control circuit board is connected to the auxiliary control circuit board through a connecting circuit.

[0015] Optionally, the auxiliary control circuit board includes an expansion device circuit; The expansion device circuit is connected to another power distribution control device via a set of 6P connecting wires.

[0016] The beneficial effects of the present application are: by adopting an independent dial control module and an emergency control module, the manual control function of a specific relay is realized, providing a reliable switch backup solution for system emergencies or when the mainboard is damaged. Its working principle is: under normal circumstances, the power system control is completed by the main control module, and the dial control module follows the instructions of the main control module to control the relay control module, and then controls the switch state of the special relay. When the mainboard is damaged or a special situation occurs, the user can directly control the relay control module through the dial control module or the emergency control module to realize forced manual control of the special relay, thereby realizing the switching of the automatic and manual working states through the dial switch, ensuring that the equipment status can be quickly controlled in special circumstances, avoiding the system from being unable to open or close normally due to damage to the mainboard, thereby improving the reliability and safety of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a module connection diagram of the mainboard emergency control circuit provided in an embodiment of the present application; Figure 2 is a circuit schematic diagram of a mainboard emergency control circuit provided in an embodiment of the present application; Figure 3 It is a circuit schematic diagram of a main control module of a mainboard emergency control circuit provided in an embodiment of the present application; Figure 4It is a circuit schematic diagram of a first indication module of a mainboard emergency control circuit provided in an embodiment of the present application; Figure 5 It is a circuit schematic diagram of the second indication module of the mainboard emergency control circuit provided in an embodiment of the present application; Figure 6 is a schematic diagram of the structure of a power distribution control device provided in an embodiment of the present application; Figure 7 It is a schematic diagram of the interconnection of several power distribution control devices provided in an embodiment of the present application.

[0018] Reference numerals: R1, first resistor; R2, second resistor; K1, first switch; K2, second switch; R6, third resistor; R7, fourth resistor; D4, first diode; D3, second diode. DETAILED DESCRIPTION

[0019] The present application is further described below in conjunction with the accompanying drawings and embodiments.

[0020] The following will clearly and completely describe the concept, specific structure and technical effects of the present application in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of them. Based on the embodiments of the present application, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the present application. In addition, all the connection / connection relationships involved in the patent do not simply refer to the direct connection of components, but refer to the formation of a better connection structure by adding or reducing connection accessories according to the specific implementation situation. The various technical features created in this application can be combined interactively without conflicting with each other.

[0021] Reference Figure 1 , Figure 1 It is a module connection diagram of the mainboard emergency control circuit provided in the embodiment of the present application, including: a dial control module, a main control module, a relay control module, an emergency control module and a relay module. Each module is specifically described below: The first end of the dial control module is connected to the input end of the main control module; the second end of the dial control module is connected to the input end of the emergency control module; Regarding the dial control module: the dial control module includes at least one dial switch, one pin of the dial switch is connected to the main control module, when the pin is connected, the main control module operates normally, the current circuit is in automatic mode, and the multiple relays in the relay module are automatically controlled to turn on or off according to the signal output by the main control module. Specifically, when the first end of the dial control module is connected to the main control module, the automatic mode is triggered; when the second end of the dial control module is connected to the circuit of the emergency control module, the manual mode is triggered. In the manual mode, the on-off control of the switch device in the emergency control module controls the relay to enter the closed or started state.

[0022] Furthermore, the first output end of the main control module is connected to the first input end of the relay control module, and the second output end of the main control module is connected to the second input end of the relay control module.

[0023] When the dial control module is controlled by the main control module, the output signal of the relay control module is controlled by the output signal of the main control module.

[0024] About the main control module: The main control module includes a main control chip. When the circuit is in automatic mode, the relay in the relay module is controlled by the main control chip. The two pins in the main control chip serve as the first output terminal and the second output terminal of the main control module respectively. When the first output terminal of the main control module outputs a high level, the relay module is started; when the second output terminal of the main control module outputs a high level, the relay module is disconnected. Among them, the first output terminal and the second output terminal of the main control module select one to output a high level.

[0025] Furthermore, the first output end of the emergency control module is connected to the first input end of the relay control module, and the second output end of the emergency control module is connected to the second input end of the relay control module.

[0026] Wherein, when the emergency control module is turned on, the output signal of the relay control module is controlled by the output signal of the emergency control module.

[0027] About the emergency control module: The emergency control module contains two branches, each of which is provided with a switch device (such as a key switch). When an emergency occurs (such as damage to the main control module), one of the two switches is pressed. When the first switch is pressed, the dial control module triggers the forced manual mode. In this case, a high-level signal is output to the first input end of the relay control module through the first switch, so that the relay module enters the conduction mode; when the second switch of the other branch is pressed, the dial control module also triggers the forced manual mode. In this case, a high-level signal is output to the second input end of the relay control module through the second switch, so that the relay module enters the disconnection mode.

[0028] Further, the first output end of the relay control module is connected to the first end of the relay module, and the second output end of the relay control module is connected to the second end of the relay module.

[0029] The on and off of the relay module is controlled by the output signal of the relay control module.

[0030] About the relay control module: The relay control module includes a control chip, which has two input terminals. At most one of the two input terminals can input a high level at the same time. When the first input terminal is at a high level, the first output terminal of the control chip will output a positive voltage, and the second output terminal will output a negative voltage. Several relays in the relay module are controlled by the first output terminal and the second output terminal of the control chip. At this time, all the relays therein operate forward (attracted), that is, the relay module enters the conduction mode; when the second input terminal is at a high level, the second output terminal of the control chip will output a positive voltage, and the first output terminal will output a negative voltage. The relays are controlled by the first output terminal and the second output terminal of the control chip, and all the relays operate in the reverse direction (disconnected), causing the relay module to enter the disconnection mode.

[0031] Further, refer to Figure 2 , Figure 2 It is a circuit schematic diagram of the mainboard emergency control circuit provided in the embodiment of the present application, and a specific implementation method of the dial control module, the relay control module, the emergency control module and the relay module is more specifically exemplified, and they are specifically described below: The dial control module includes a dial switch of model SS13D07L4B, a first resistor R1, and a second resistor R2; The input end of the main control module is connected to the first end of the dip switch through the first resistor R1, and the first end of the dip switch is also connected to the external automatic mode indicator light through the second resistor R2; The second end of the dip switch is connected to an external DC signal source; The fourth end of the dip switch is connected to the input end of the emergency control module.

[0032] Specifically, when the first end of the dip switch is connected, the dip switch and the main control chip obtain signal interaction, and the dip switch sends a high-level signal to the main control module through its first end, and the main control module continues to send signals to the relay control module based on the high-level signal (in this case, automatic mode). According to the signals output by the main control module to different pins of the relay control module, all relays in the relay module can be controlled to run forward (closed) or reverse (disconnected).

[0033] Specifically, when the dip switch is connected to the fourth end, the dip switch is controlled by the emergency control module. This is usually an emergency control when an emergency occurs or the main control chip or the main control circuit board (the circuit board where the main control chip is located) is damaged. In this case, the emergency mode (manual mode) is entered, and the dip switch outputs a high-level signal through its fourth end and the path in the emergency control module to one of the input pins of the relay control module. Depending on the input pin of the relay control module that is triggered, all relays in the relay module can be controlled to operate forward (closed) or reverse (disconnected).

[0034] More specifically, when the first end of the dip switch is connected, on the one hand, the above-mentioned automatic mode is started, and on the other hand, the corresponding automatic mode indicator light will be controlled to light up after the second resistor R2 divides the voltage, so as to remind the relevant personnel that the current mode is in automatic mode, and the main control chip controls the start and stop of the relay.

[0035] Further, the emergency control module includes a first switch K1, a third resistor R6, a second switch K2 and a fourth resistor R7; One end of the first switch K1 is connected to the fourth end of the dip switch, and the other end is connected to the first input end of the relay control module through the third resistor R6; One end of the second switch K2 is connected to the fourth end of the DIP switch, and the other end is connected to the second input end of the relay control module through the fourth resistor R7.

[0036] Specifically, the first switch K1 and the second switch K2 are exemplified by push switches in the embodiment of the present application. When the first switch K1 is pressed, the second switch K2 is in a disconnected state, and the signal is output from the DC signal source at the second end of the dip switch through the fourth end of the dip switch, the first switch K1, and the third resistor R6 to the first input end of the relay control module, so that the relay control module outputs a positive voltage through its first output end and a negative voltage through the second output end, so that the three relays in the relay module operate forward (closed).

[0037] More specifically, when the second switch K2 is pressed, in this case the first switch K1 is disconnected, and the signal is instead output to the second input terminal of the relay control module through the second switch K2 and the fourth resistor R7, so that the relay control module outputs a positive voltage through its second output terminal and a negative voltage through its first output terminal, so that the three relays in the relay module operate in reverse (disconnected).

[0038] Furthermore, the relay control module includes a control chip of model MD7620; The first end of the control chip is connected to the first end of the relay module, the second end of the control chip is grounded, and the third end of the control chip is connected to the first switch K1 through the third resistor R6; The fourth end of the control chip is connected to the second end of the relay module, the fifth end of the control chip is connected to the DC signal source, and the sixth end of the control chip is connected to the second switch K2 through the fourth resistor R7.

[0039] Wherein, the main control module includes a main control chip.

[0040] Specifically, the first end of the control chip serves as the first output end of the relay control module, the second end is the ground end, the third end is the first input end of the relay control module, the fourth end is the second output end of the relay control module, the fifth end is the power supply segment, and the sixth end is the second input end of the relay control module.

[0041] More specifically, in automatic mode (controlled by the main control chip), the first end of the dip switch is connected, and the main control chip can output a high level to the third end INA of the control chip through its PC11 pin. In this case, the first end OB of the control chip outputs a positive voltage, and the fourth end OA outputs a negative voltage, so that all relays in the relay module operate in the forward direction; the main control chip can also output a high level to the sixth end INB of the control chip through its PC12 pin, so that the first end OB of the control chip outputs a negative voltage, and the fourth end OA outputs a positive voltage, and all relays in the relay module operate in the reverse direction.

[0042] Further, the relay control module further includes: a first diode D4 and a second diode D3; The cathode of the first diode D4 is connected to the third terminal of the control chip, and the anode of the second diode is connected to the first output terminal of the main control module; The cathode of the second diode D3 is connected to the sixth terminal of the control chip, and the anode of the second diode D3 is connected to the second output terminal of the main control module.

[0043] Specifically, a first diode D4 is connected in series between the PC11 pin of the main control chip and the third terminal INA of the control chip to prevent current backflow, and a second diode is connected in series between the PC12 pin of the main control chip and the sixth terminal INB of the control chip to prevent current backflow, thereby improving control stability, avoiding damage to devices caused by backflow, and ensuring circuit reliability.

[0044] Furthermore, the main control module includes a main control chip of model CH32F208W, referring to Figure 3 , Figure 3It is a circuit schematic diagram of the main control module of the mainboard emergency control circuit provided in the embodiment of the present application.

[0045] Furthermore, it also includes: a first indication module and a second indication module; The input end of the first indication module is connected to the connection point of the first switch K1 and the relay control module, and is used to control the indicator light in the first indication module to light up when the first switch K1 is closed.

[0046] Specifically, refer to Figure 4 , Figure 4 This is a circuit schematic diagram of the first indication module of the mainboard emergency control circuit provided in the embodiment of the present application. Figure 4 The first indication module is described in detail. The first indication module is used to light up the first indicator light set therein to remind relevant personnel that the current device status is relay energized. Specifically, when the third terminal INA of the control chip is at a high level (in this case, the control principle refers to the above), the high level is simultaneously pulled up by the diode D1. Figure 4 The 12V_Key1+ (i.e. Figure 2 The high level is connected to the ground through the diode D7 and the resistor R16, thereby controlling the first indicator light 3 to light up through the resistor R14, thereby completing the relay status indication.

[0047] The input end of the second indication module is connected to the connection point between the second switch K2 and the relay control module, and is used to control the indicator light in the second indication module to light up when the second switch K2 is closed.

[0048] Specifically, the working principle of the first indication module is similar to that of the first indication module. Figure 5 , Figure 5 This is a circuit schematic diagram of the second indication module of the mainboard emergency control circuit provided in the embodiment of the present application. The second indication module is used to light up the second indicator light set therein to remind relevant personnel that the current device status is relay disconnection. Specifically, when the sixth terminal INB of the control chip is at a high level (in this case, the control principle refers to the above), the high level is simultaneously pulled up by the diode D2. Figure 5 As shown in the figure, the high level is connected to the ground through the diode D9 and the resistor R17, thereby controlling the second indicator light 4 to light up through the resistor R15, completing the relay status indication.

[0049] Furthermore, the relay module includes a first relay, a second relay and a third relay.

[0050] Specifically, three relays are equipped because they are designed for synchronous operation. When starting is required, they will be energized at the same time; and when stopping is required, they will be disconnected at the same time, thus adapting to the control requirements of three-phase electricity. In a three-phase power system, there are usually three phases (or lines) A, B, and C. When the voltage between phases AB (ie AV380V) is used to power the equipment, by closing the relays of phases ABC at the same time, the entire three-phase AC380V load can be effectively powered. This design ensures that both single-phase and multi-phase electrical equipment can get the correct power supply.

[0051] More specifically, in some cases, a single-phase power supply mode can also be used. For example, connect phase A to the live wire L, phase B to the neutral wire N, and leave phase C unconnected. At this time, the voltage provided between LN is 220V, which is suitable for the working requirements of single-phase AV220V equipment. Even in this case, all three relays are still required to work together to ensure the consistency and safety of the system. Therefore, setting up three relays is based on the ability to flexibly respond to different types of power requirements and ensure electrical safety considerations.

[0052] In a second aspect, the present application provides a power distribution control device, including: a main control circuit board, a sub-control circuit board and three relays; The main control circuit board is loaded with the above-mentioned main control module, and the auxiliary control circuit board is loaded with the above-mentioned dial control module, relay control module and emergency control module; The main control circuit board is connected to the auxiliary control circuit board through a connecting circuit.

[0053] Specifically, refer to Figure 6 , Figure 6 This is a schematic diagram of the structure of the power distribution control device provided in the embodiment of the present application. Figure 6 It mainly includes three special relays ( Figure 6 As shown in the figure, relay 1, relay 2, relay 3), main control circuit board 4, auxiliary control circuit board 5, first flame retardant housing 6 and second flame retardant housing 7. Further, arc isolation plug-in can be provided on this basis, such as Figure 6 The first plug-in 8 and the second plug-in 9, the temperature, humidity and smoke sensing module, and the external wireless radio frequency module are shown.

[0054] Among them, the main control circuit board 4 includes the main control module provided in the above-mentioned mainboard emergency control circuit embodiment, and the sub-control circuit board 5 is provided with the above-mentioned dial control module, relay control module and emergency control module. The main control circuit board 4 and the sub-control circuit board 5 are connected through the corresponding circuit connection board.

[0055] More specifically, in one embodiment, the main control circuit board 4 includes but is not limited to: an RJ45 communication module for providing an interface for the entire system to communicate with a local area network or the Internet, an external wireless radio frequency module for power supply and access port for the system's external radio frequency module, a main control module responsible for handling logic control and data processing capabilities, a sub-control module connection circuit that provides an access port for the sub-control circuit board 5, and / or a communication module that provides the entire system with communication with other devices.

[0056] In one embodiment, the auxiliary control circuit board 5 is provided with, but is not limited to: a main control module connection circuit that provides an access port for the main control circuit board, a dial control module, an emergency control module, a power supply module that provides a wide voltage input AC90-420V input and a stable voltage supply for the system, a first indication module, a second indication module and / or an expansion device module that provides a communication interface with other devices for the entire system.

[0057] Furthermore, a temperature, humidity and smoke sensor module can be optionally configured according to actual needs. The temperature, humidity and smoke sensor module includes but is not limited to: a temperature and humidity main control module for processing logic control and temperature, humidity and smoke sensor data processing capabilities, a temperature and humidity chip that provides temperature and humidity data to the system, a smoke sensor access module that provides power supply and feedback interface for external smoke sensors, and / or a power communication module that provides power connection and system communication interface.

[0058] Further, refer to Figure 7 , Figure 7 It is a schematic diagram of the interconnection of several power distribution control devices provided in the embodiment of the present application. Specifically, the auxiliary control circuit board includes an expansion device circuit; the expansion device circuit is connected to another power distribution control device through a set of 6P connecting wires, and supports a maximum of 24 power distribution control devices to be connected to each other.

[0059] Specifically, the customized 6P cable includes the following six parts: power supply positive pole, power supply negative pole, communication 1 positive pole, communication 1 negative pole, communication 2 positive pole and communication 2 negative pole. The reasons for using this customized 6P cable are as follows: First, when multiple distribution control devices are connected together, if the internal power supply of one of the distribution control devices fails, other normally functioning distribution control devices can be powered by the power supply in this 6P connection line to ensure the continuous operation of the entire system.

[0060] Secondly, this design facilitates the addition of different types of equipment in the future, and can flexibly respond to new changes in demand in terms of power supply or data communication.

[0061] Third, by using this 6P connecting line, when multiple distribution control devices are connected, they can directly exchange information, improving the overall efficiency and response speed of the system.

[0062] Fourth, in a complex network environment, if a communication line (such as communication 1) fails or has poor contact, the system can automatically switch to the backup line (ie communication 2), thereby ensuring the stability and reliability of data transmission.

[0063] The above is a specific description of the preferred implementation of the present application, but the invention of the present application is not limited to the described embodiments. Technical personnel familiar with the field can also make various equivalent modifications or substitutions without violating the spirit of the present application. These equivalent modifications or substitutions are all included in the scope defined by the claims of the present application.

Claims

1. A mainboard emergency control circuit, characterized in that: include: Dial control module, main control module, relay control module, emergency control module and relay module; The first end of the dial control module is connected to the input end of the main control module, the first output end of the main control module is connected to the first input end of the relay control module, and the second output end of the main control module is connected to the second input end of the relay control module, so as to control the output signal of the relay control module through the output signal of the main control module when the dial control module is controlled by the main control module; The second end of the dial control module is connected to the input end of the emergency control module, the first output end of the emergency control module is connected to the first input end of the relay control module, and the second output end of the emergency control module is connected to the second input end of the relay control module, so as to control the output signal of the relay control module through the output signal of the emergency control module when the emergency control module is turned on; The first output end of the relay control module is connected to the first end of the relay module, and the second output end of the relay control module is connected to the second end of the relay module, and is used to control the on and off of the relay module through the output signal of the relay control module.

2. The mainboard emergency control circuit according to claim 1, characterized in that: The dial control module includes a dial switch of model SS13D07L4B, a first resistor, and a second resistor; The input end of the main control module is connected to the first end of the dip switch through the first resistor, and the first end of the dip switch is also connected to an external automatic mode indicator light through the second resistor; The second end of the dip switch is connected to an external DC signal source; The fourth end of the dip switch is connected to the input end of the emergency control module.

3. The mainboard emergency control circuit according to claim 2, characterized in that: The emergency control module includes a first switch, a third resistor, a second switch and a fourth resistor; One end of the first switch is connected to the fourth end of the dip switch, and the other end is connected to the first input end of the relay control module through the third resistor; One end of the second switch is connected to the fourth end of the dip switch, and the other end is connected to the second input end of the relay control module through the fourth resistor.

4. The mainboard emergency control circuit according to claim 3, characterized in that: The relay control module includes a control chip of model MD7620; The first end of the control chip is connected to the first end of the relay module, the second end of the control chip is grounded, and the third end of the control chip is connected to the first switch through the third resistor; The fourth end of the control chip is connected to the second end of the relay module, the fifth end of the control chip is connected to the DC signal source, and the sixth end of the control chip is connected to the second switch through the fourth resistor.

5. The mainboard emergency control circuit according to claim 4, characterized in that: The relay control module further includes: a first diode and a second diode; The cathode of the first diode is connected to the third terminal of the control chip, and the anode of the second diode is connected to the first output terminal of the main control module; The cathode of the second diode is connected to the sixth terminal of the control chip, and the anode of the second diode is connected to the second output terminal of the main control module.

6. The mainboard emergency control circuit according to claim 4, characterized in that: The main control module includes a main control chip of model CH32F208W.

7. The mainboard emergency control circuit according to claim 3, characterized in that: Also includes: a first indication module and a second indication module; The input end of the first indication module is connected to the connection point between the first switch and the relay control module, and is used to control the indicator light in the first indication module to light up when the first switch is closed; The input end of the second indication module is connected to the connection point between the second switch and the relay control module, and is used to control the indicator light in the second indication module to light up when the second switch is closed.

8. The mainboard emergency control circuit according to claim 1, characterized in that: The relay module includes a first relay, a second relay and a third relay.

9. A power distribution control device, characterized in that: include: Main control circuit board, sub-control circuit board and three relays; The main control circuit board is loaded with the main control module as described in any one of claims 1 to 8, and the auxiliary control circuit board is loaded with the dial control module, relay control module and emergency control module as described in any one of claims 1 to 8; The main control circuit board is connected to the auxiliary control circuit board through a connecting circuit.

10. The power distribution control device according to claim 9, characterized in that: The sub-control circuit board includes an expansion device circuit; The expansion device circuit is connected to another power distribution control device via a set of 6P connecting wires.

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