Power distribution control device and mainboard emergency control circuit

Abstract

The utility model 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 particularly relates to a power distribution control device and a mainboard emergency control circuit. BACKGROUND

[0002] The existing power supply system generally adopts PLC control contactors to realize switching control of electrical equipment. Such traditional contactors only have simple electrical switching functions and lack logic control and data processing capabilities, which are difficult to meet the intelligentization and flexibility requirements of modern industry on control systems.

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

[0004] In view of the above problems, it is necessary to design a power supply control system capable of realizing efficient, intelligent and reliable power supply control, which can ensure safe operation of the system and stable operation of the system when the main control board fails or in other emergency situations. CONTENT 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 dial switch, ensures that the equipment state can be quickly controlled in special situations, avoids the system from being unable to normally start or stop due to mainboard damage, and thus improves the reliability and safety of the system.

[0006] The technical scheme adopted by the present application to solve its technical problems is:

[0007] In a first aspect, the present application provides a mainboard emergency control circuit, comprising: a dial control module, a main control module, a relay control module, an emergency control module and a relay module;

[0008] 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;

[0009] 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.

[0010] 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, so as to control the on-off of the relay module through the output signal of the relay control module.

[0011] Optionally, the dial control module comprises a dial switch with a model of SS13D07L4B, a first resistor and a second resistor.

[0012] The input end of the main control module is connected to the first end of the dial switch through the first resistor, and the first end of the dial switch is also connected to an external automatic mode indicator lamp through the second resistor.

[0013] The second end of the dial switch is connected to an external direct current signal source.

[0014] The fourth end of the dial switch is connected to the input end of the emergency control module.

[0015] Optionally, the emergency control module comprises a first switch, a third resistor, a second switch and a fourth resistor.

[0016] One end of the first switch is connected to the fourth end of the dial switch, and the other end is connected to the first input end of the relay control module through the third resistor.

[0017] One end of the second switch is connected to the fourth end of the dial switch, and the other end is connected to the second input end of the relay control module through the fourth resistor.

[0018] Optionally, the relay control module comprises a control chip with a model of MD7620.

[0019] 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, 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 direct current signal source, and the sixth end of the control chip is connected to the second switch through the fourth resistor.

[0020] 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, 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 direct current signal source, and the sixth end of the control chip is connected to the second switch through the fourth resistor.

[0021] Optionally, the relay control module further comprises a first diode and a second diode.

[0022] The negative electrode of the first diode is connected to the third end of the control chip, and the positive electrode of the second diode is connected to the first output end of the main control module.

[0023] The negative electrode of the second diode is connected to the sixth end of the control chip, and the positive electrode of the second diode is connected to the second output end of the main control module.

[0024] Optionally, the main control module comprises a main control chip of CH32F208W type.

[0025] Optionally, further comprising a first indication module and a second indication module.

[0026] The input end of the first indication module is connected to the connection between the first switch and the relay control module, and is used for controlling the indicator light in the first indication module to turn on when the first switch is closed.

[0027] The input end of the second indication module is connected to the connection between the second switch and the relay control module, and is used for controlling the indicator light in the second indication module to turn on when the second switch is closed.

[0028] Optionally, the relay module comprises a first relay, a second relay and a third relay.

[0029] In a second aspect, the application provides a power distribution control device, comprising a main control circuit board, a sub-control circuit board and three relays.

[0030] The main control circuit board is loaded with the main control module, and the sub-control circuit board is loaded with the code control module, the relay control module and the emergency control module.

[0031] The main control circuit board is connected to the sub-control circuit board through a connection circuit.

[0032] Optionally, the sub-control circuit board comprises an expansion device circuit.

[0033] The expansion device circuit is connected to another power distribution control device through a set of 6P connection lines.

[0034] The application has the beneficial effects that: by adopting the independent dial control module and the emergency control module, the manual control function of the specific relay is realized, and a reliable switching backup solution is provided for the system emergency or the mainboard damage. The working principle is that: in the normal condition, the power system control is completed by the main control module, the dial control module controls the relay control module following the instruction of the main control module, and then controls the switching 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 the forced manual control of the special relay, so as to realize the switching of the automatic and manual working states through the dial switch, ensure that the equipment state can be quickly controlled in the special situation, avoid the system from being unable to normally start or stop due to the mainboard damage, and improve the reliability and safety of the system. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 is the module connection diagram of the mainboard emergency control circuit provided by the embodiment of the application;

[0036] Figure 2 is the circuit principle diagram of the mainboard emergency control circuit provided by the embodiment of the application;

[0037] Figure 3 is the circuit principle diagram of the main control module of the mainboard emergency control circuit provided by the embodiment of the application;

[0038] Figure 4 is the circuit principle diagram of the first indication module of the mainboard emergency control circuit provided by the embodiment of the application;

[0039] Figure 5 is the circuit principle diagram of the second indication module of the mainboard emergency control circuit provided by the embodiment of the application;

[0040] Figure 6 is the structural schematic diagram of the power distribution control device provided by the embodiment of the application;

[0041] Figure 7 is the interconnection schematic diagram of a plurality of power distribution control devices provided by the embodiment of the application.

[0042] Reference signs: 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

[0043] The application will be further described below in combination with the drawings and embodiments.

[0044] The concept, specific structure and generated technical effects of the present application will be described clearly and completely in combination with the embodiments and the drawings, so as to fully understand the purpose, features and effects of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments, and other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative labor are within the protection scope of the present application. In addition, all the coupling / connection relations involved in the patent do not mean that the components are directly connected, but that a better coupling structure can be composed by adding or reducing coupling accessories according to the specific implementation. The technical features in the creation of the present application can be combined interactively without conflict.

[0045] Reference Figure 1 , Figure 1 is a module connection diagram of the main board emergency control circuit provided by the embodiment of the present application, comprising: a dial control module, a main control module, a relay control module, an emergency control module and a relay module, and each module will be described below:

[0046] 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.

[0047] 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 normally operates, the current circuit is in automatic mode, and the multiple relays in the relay module are automatically controlled to open or close 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 loop of the emergency control module, the manual mode is triggered, and in the manual mode, the on-off of the switch device in the emergency control module controls the relay to enter the closed or started state.

[0048] Further, 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.

[0049] Wherein, when the dial control module is controlled by the main control module, the output signal of the main control module controls the output signal of the relay control module.

[0050] As to the main control module, the main control module comprises a main control chip, when the circuit is in the automatic mode, the relay in the relay module is controlled by the main control chip, two pins in the main control chip are respectively used as the first output end of the main control module and the second output end of the main control module, when the first output end of the main control module outputs a high level, the relay module is started; when the second output end of the main control module outputs a high level, the relay module is disconnected. Wherein, the first output end and the second output end of the main control module output a high level alternatively.

[0051] Further, 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.

[0052] Wherein, when the emergency control module is turned on, the output signal of the emergency control module is used to control the output signal of the relay control module.

[0053] As to the emergency control module, two branches are contained in the emergency control module, and a switch device (for example, a key switch) is arranged on each branch, and the two switches are pressed alternatively when an emergency occurs (for example, the main control module is damaged). When the first switch is pressed, the dial control module triggers the forced manual mode, in which case the 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 which case the 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 disconnected mode.

[0054] Further, 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.

[0055] Wherein, the output signal of the relay control module is used to control the on-off of the relay module.

[0056] As to the relay control module, the relay control module comprises a control chip, the control chip has two input ends, at most one of the two input ends inputs high level at the same time, when the first input end is high level, the first output end of the control chip outputs positive voltage, and the second output end outputs negative voltage, a plurality of relays in the relay module are controlled by the first output end and the second output end of the control chip, at this time, all the relays in the relay module operate in forward direction (suck in), that is, the relay module enters the conduction mode; when the second input end is high level, the second output end of the control chip outputs positive voltage, and the first output end outputs negative voltage, the relays are controlled by the first output end and the second output end of the control chip, all the relays operate in reverse direction (break), so that the relay module enters the break mode.

[0057] Further, referring to Figure 2 , Figure 2 is a circuit principle diagram of the mainboard emergency control circuit provided by the embodiment of the application, a specific implementation of the dial control module, the relay control module, the emergency control module and the relay module is more specifically exemplified, which will be specifically described as follows:

[0058] The dial control module comprises a dial switch with a model of SS13D07L4B, a first resistor R1 and a second resistor R2.

[0059] The input end of the main control module is connected with the first end of the dial switch through the first resistor R1, and the first end of the dial switch is further connected with an external automatic mode indicator lamp through the second resistor R2.

[0060] The second end of the dial switch is connected with an external direct current signal source.

[0061] The fourth end of the dial switch is connected with the input end of the emergency control module.

[0062] Specifically, when the dial switch is connected with the first end, the dial switch and the main control chip interact with signals, and the dial switch gives a high level signal to the main control module through the first end, and the main control module continuously sends signals to the relay control module based on the high level signal (in this case, the automatic mode). According to the signals output by the main control module to different pins of the relay control module, all the relays in the relay module can be controlled to operate in forward direction (suck in) or reverse direction (break).

[0063] Specifically, when the dial switch is connected to the fourth end, the dial switch is controlled by the emergency control module, which is usually an emergency control when an emergency occurs or the main control chip and the main control circuit board (the circuit board where the main control chip is located) are damaged, in which case the emergency mode (manual mode) is entered. The dial switch outputs a high-level signal to one of the input pins of the relay control module through the fourth end and the path in the emergency control module. According to the different input pins triggered by the relay control module, all the relays in the relay module can be controlled to operate forward (attract) or reverse (open).

[0064] More specifically, when the first end of the dial switch is connected, on the one hand, the automatic mode is started, and on the other hand, the corresponding automatic mode indicator light is controlled to turn on after being divided by the second resistor R2, prompting relevant personnel that the current mode is in the automatic mode, and the relay is controlled by the main control chip to start and stop.

[0065] Further, the emergency control module comprises a first switch K1, a third resistor R6, a second switch K2 and a fourth resistor R7;

[0066] One end of the first switch K1 is connected to the fourth end of the dial switch, and the other end is connected to the first input end of the relay control module through the third resistor R6;

[0067] One end of the second switch K2 is connected to the fourth end of the dial switch, and the other end is connected to the second input end of the relay control module through the fourth resistor R7.

[0068] Specifically, the first switch K1 and the second switch K2 are exemplified by key switches in the embodiments of the present application. When the first switch K1 is pressed, the second switch K2 is in an open state at this time, and the signal is output to the first input end of the relay control module from the DC signal source of the second end of the dial switch, the fourth end of the dial switch, the first switch K1 and the third resistor R6, so that the relay control module outputs a positive voltage through its first output end and a negative voltage through its second output end, so that the three relays in the relay module operate forward (attract).

[0069] More specifically, when the second switch K2 is pressed, the first switch K1 is disconnected in this case, and the signal is output to the second input end 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 end and a negative voltage through its first output end, so that the three relays in the relay module operate reverse (open).

[0070] Further, the relay control module comprises a control chip of model MD7620;

[0071] 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.

[0072] 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 direct current signal source, and the sixth end of the control chip is connected to the second switch K2 through the fourth resistor R7.

[0073] The main control module comprises a main control chip.

[0074] Specifically, the first end of the control chip serves as the first output end of the relay control module, the second end thereof is a ground end, the third end thereof is the first input end of the relay control module, the fourth end thereof is the second output end of the relay control module, the fifth end thereof is a power supply section, and the sixth end thereof is the second input end of the relay control module.

[0075] More specifically, in the automatic mode (main control chip control), the first end of the dial switch is turned on, the main control chip can output a high level to the third end INA of the control chip through the PC11 pin thereof, 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 the 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 the PC12 pin thereof, so that the first end OB of the control chip outputs a negative voltage, and the fourth end OA outputs a positive voltage, so that all the relays in the relay module operate in the reverse direction.

[0076] Further, the relay control module further comprises a first diode D4 and a second diode D3.

[0077] The negative electrode of the first diode D4 is connected to the third end of the control chip, and the positive electrode of the second diode is connected to the first output end of the main control module.

[0078] The negative electrode of the second diode D3 is connected to the sixth end of the control chip, and the positive electrode of the second diode D3 is connected to the second output end of the main control module.

[0079] Specifically, between the PC11 pin of the main control chip and the third end INA of the control chip, the first diode D4 is connected in series to prevent current backflow, and between the PC12 pin of the main control chip and the sixth end INB of the control chip, the second diode is connected in series to prevent current backflow, thereby improving control stability, avoiding damage to devices caused by backflow, and ensuring circuit reliability.

[0080] Further, the main control module comprises a main control chip of the CH32F208W type, as shown in Figure 3 ,Figure 3 is a circuit schematic of a main control module of an emergency control circuit of a mainboard provided by an embodiment of the present application.

[0081] Further, the first indication module and the second indication module are further included.

[0082] The input end of the first indication module is connected to the connection between the first switch K1 and the relay control module, and is used to control the indicator lamp in the first indication module to light up when the first switch K1 is closed.

[0083] Specifically, referring to Figure 4 , Figure 4 is a circuit schematic of a first indication module of an emergency control circuit of a mainboard provided by an embodiment of the present application. The first indication module will be specifically described below. Figure 4 The first indication module is used to light up the first indicator lamp arranged therein to prompt the relevant personnel that the current device state is that the relay is attracted. Specifically, when the third end INA of the control chip is at a high level (in this case, the control principle is referred to above), the high level is pulled up to 12V_Key1+ (i.e., 12V_Key1+ shown in Figure 4 ) through the diode D1 at the same time, and the high level is led to the ground through the diode D7 and the resistor R16, so that the first indicator lamp 3 is controlled to light up through the resistor R14, and the relay state indication is completed. Figure 2

[0084] The input end of the second indication module is connected to the connection between the second switch K2 and the relay control module, and is used to control the indicator lamp in the second indication module to light up when the second switch K2 is closed.

[0085] Specifically, similar to the working principle of the first indication module described above, referring to Figure 5 , Figure 5 is a circuit schematic of a second indication module of an emergency control circuit of a mainboard provided by an embodiment of the present application. The second indication module is used to light up the second indicator lamp arranged therein to prompt the relevant personnel that the current device state is that the relay is disconnected. Specifically, when the sixth end INB of the control chip is at a high level (in this case, the control principle is referred to above), the high level is pulled up to 12V_Key2+ through the diode D2 at the same time, and the high level is led to the ground through the diode D9 and the resistor R17, so that the second indicator lamp 4 is controlled to light up through the resistor R15, and the relay state indication is completed. Figure 5

[0086] Further, the relay module includes a first relay, a second relay, and a third relay.

[0087] ​​Specifically, the reason for equipping three relays is that the three relays are designed for synchronous operation. When starting is needed, they will be attracted at the same time; and when stopping is needed, they will be opened at the same time, thereby adapting to the control requirements of three-phase power. In a three-phase power system, there are usually three phases (or lines) A, B and C. When using the voltage between AB phases (i.e. AV380V) to supply power to the equipment, by simultaneously closing the relays of the three phases A, B and C, the effective power supply to the entire three-phase AC380V load can be realized. Such a design ensures that single-phase or multi-phase electrical equipment can be correctly powered.

[0088] More specifically, in some cases, a single-phase power supply mode can also be used. For example, the A phase is connected to the live wire L, the B phase is connected to the neutral wire N, and the C phase is left 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 still need to act together to ensure system consistency and safety. Therefore, the setting of three relays is the result of being able to flexibly respond to different types of power supply requirements and ensuring electrical safety considerations.

[0089] In a second aspect, the application provides a power distribution control device, comprising: a main control circuit board, a secondary control circuit board and three relays;

[0090] The main control circuit board is loaded with the above-mentioned main control module, and the secondary control circuit board is loaded with the above-mentioned dial control module, relay control module and emergency control module.

[0091] The main control circuit board is connected to the secondary control circuit board through a connection circuit.

[0092] Specifically, referring to Figure 6 , Figure 6 is a structural schematic diagram of the power distribution control device provided by the embodiment of the application, which will be described in detail below in combination with Figure 6 . It mainly includes three special relays (relay 1, relay 2 and relay 3) as shown in Figure 6 , a main control circuit board 4, a secondary control circuit board 5, a first flame-retardant housing 6 and a second flame-retardant housing 7. Further, arc separation inserts such as the first insert 8 and the second insert 9 shown in Figure 6 , a temperature and humidity smoke sensing module and an external wireless radio frequency module can also be provided.

[0093] Among them, the main control circuit board 4 includes the main control module provided in the above-mentioned main board emergency control circuit embodiment, the secondary control circuit board 5 is provided with the above-mentioned dial control module, relay control module and emergency control module, and the main control circuit board 4 and the secondary control circuit board 5 are connected through the corresponding circuit connection plate.

[0094] More specifically, in one embodiment, the main control circuit board 4 includes, but is not limited to, being provided with: 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 providing a power supply and interface for the external radio frequency module of the system, a main control module responsible for processing logical control and data processing capabilities, a sub-control module connection circuit for providing an interface for the sub-control circuit board 5, and / or a communication module for providing communication with other devices for the entire system.

[0095] In one embodiment, the sub-control circuit board 5 includes, but is not limited to, being provided with: a main control module connection circuit for providing an interface for the main control circuit board, a dial control module, an emergency control module, a power supply module for providing a wide voltage input AC 90-420V input and stable voltage supply for the system, a first indication module, a second indication module, and / or an expansion device module for providing a communication interface for the entire system and other devices.

[0096] Further, a temperature and humidity smoke sensing module can also be selected according to actual needs, which includes, but is not limited to: a temperature and humidity main control module for processing logical control and temperature and humidity smoke sensing data processing capabilities, a temperature and humidity chip for providing temperature and humidity data for the system, a smoke sensing access module for providing power supply and feedback interface for external smoke sensing, and / or a power supply communication module for providing power connection and system communication interface.

[0097] Further, referring to Figure 7 , Figure 7 is the interconnection schematic diagram of several power distribution control devices provided by the embodiments of the present application. Specifically, the sub-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 connection lines, and can support up to 24 power distribution control devices connected to each other.

[0098] Specifically, the customized 6P connection line includes the following six parts: power supply positive, power supply negative, communication 1 positive, communication 1 negative, communication 2 positive, and communication 2 negative. The reasons for using this customized 6P connection line are as follows:

[0099] Firstly, when multiple power distribution control devices are connected together, if the internal power supply of one of the power distribution control devices fails, the other normally working power distribution control devices can supply power to it through the power supply in the 6P connection line, ensuring the continuous operation of the entire system.

[0100] Secondly, this design provides convenience for different types of devices that may be added in the future, and can flexibly respond to new demand changes in terms of power supply and data communication.

[0101] Thirdly, by using the 6P connection line, when multiple power distribution control devices are connected, they can directly exchange information, improving the overall efficiency and response speed of the system.

[0102] Fourthly, in a complex network environment, if a communication line (such as communication 1) fails or has poor contact, the system can automatically switch to a backup line (i.e. communication 2), thereby ensuring the stability and reliability of data transmission.

[0103] The above is a specific description of the preferred implementation of the present application, but the present application is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or replacements without deviating from the spirit of the present application. These equivalent modifications or replacements are all included within the scope defined by the claims of the present application.

Claims

1. A motherboard emergency control circuit, characterized in that, include: DIP switch control module, main control module, relay control module, emergency control module, and relay module; The first terminal of the DIP switch control module is connected to the input terminal of the main control module, the first output terminal of the main control module is connected to the first input terminal of the relay control module, and the second output terminal of the main control module is connected to the second input terminal of the relay control module. This is used to control the output signal of the relay control module through the output signal of the main control module when the DIP switch control module is controlled by the main control module. The second terminal of the DIP switch control module is connected to the input terminal of the emergency control module, the first output terminal of the emergency control module is connected to the first input terminal of the relay control module, and the second output terminal of the emergency control module is connected to the second input terminal of the relay control module. This is used 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 terminal of the relay control module is connected to the first terminal of the relay module, and the second output terminal of the relay control module is connected to the second terminal of the relay module, for controlling the on / off state of the relay module through the output signal of the relay control module.

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

3. The motherboard 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 terminal of the DIP switch, and the other end is connected to the first input terminal of the relay control module through the third resistor; One end of the second switch is connected to the fourth terminal of the DIP switch, and the other end is connected to the second input terminal of the relay control module through the fourth resistor.

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

5. The motherboard 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 negative terminal of the second diode is connected to the sixth terminal of the control chip, and the positive terminal of the second diode is connected to the second output terminal of the main control module.

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

7. The motherboard emergency control circuit according to claim 3, characterized in that, Also includes: First indicator module and second indicator module; The input terminal of the first indicator 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 indicator module to light up when the first switch is closed; The input terminal of the second indicator 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 indicator module to light up when the second switch is closed.

8. The motherboard 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, secondary control circuit board, and three relays; The main control circuit board is equipped with a main control module as described in any one of claims 1-8, and the secondary control circuit board is equipped with a DIP switch control module, a relay control module, and an emergency control module as described in any one of claims 1-8; The main control circuit board is connected to the secondary control circuit board via a connection circuit.

10. The power distribution control device according to claim 9, characterized in that, The secondary control circuit board includes an expansion device circuit. The extended device circuit is connected to another power distribution control device via a set of 6P connection lines.

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