Onboard connection circuit for internal communication

Abstract

The utility model relates to the technical field of onboard circuits, and discloses an onboard connection circuit for internal communication, which comprises a plugboard J10, a relay K1, a first input module, a second input module, a third input module and a fourth input module. According to the invention, multi-path relay control and merging input and output are realized, so that after a plurality of input signals are integrated and processed, the outputs of a plurality of relays are accurately controlled based on a preset circuit, efficient control and coordination of different devices or modules are realized, and the overall reliability, flexibility and resource utilization rate of the system are effectively improved.

Description

Technical Field

[0001] The present application relates to the technical field of on-board circuits, and in particular to an on-board connection circuit for internal communication. Background Art

[0002] In modern electronic devices and systems, the efficiency and stability of internal communications are crucial.

[0003] In their research on onboard connection circuits, the inventors discovered that traditional onboard connection circuits often have a single function and are unable to meet increasingly complex control needs. It is understandable that as system integration continues to increase, higher requirements are placed on the flexibility and resource integration of input and output control. In many scenarios such as industrial control, smart homes, and communication base stations, multiple devices or modules need to be centrally managed and controlled. For example, the collaborative work of numerous sensors and actuators on industrial automation production lines, and the linkage control of various electrical devices in smart home systems. The previous decentralized input and output control method not only took up a lot of space, but also led to complex wiring, high costs, and difficult troubleshooting.

[0004] In summary, a new on-board connection circuit for internal communication is urgently needed to solve the above problems. Utility Model Content

[0005] The purpose of this application is to provide an onboard connection circuit for internal communication to solve the technical problems raised in the above background technology.

[0006] To achieve the above-mentioned object, the present application discloses the following technical solutions: an onboard connection circuit for internal communication, comprising a plugboard J10, a relay K1, a first input module, a second input module, a third input module, and a fourth input module;

[0007] The first input module is connected to the plugboard J10, and the first input module is also connected to the relay K1;

[0008] The second input module is connected to the plugboard J10, and the second input module is also connected to the relay K1;

[0009] The third input module is connected to the plugboard J10, and the third input module is also connected to the relay K1;

[0010] The fourth input module is connected to the plugboard J10, and the fourth input module is also connected to the relay K1.

[0011] Preferably, the first input module includes a socket J2, a socket J3, a resistor R1, a PLC control switch S1, a resistor R3, a resistor R8 and a polarity capacitor C5;

[0012] The A5 pin of the plug board J10 is connected to the A6 pin of the plug board J10 and then connected to the 3 pin of the socket J2; the A5 pin of the plug board J10 is connected to the A6 pin of the plug board J10 and then connected to the 3 pin of the socket J3;

[0013] Pin 1 of the socket J2 is grounded; Pin 1 of the socket J3 is grounded;

[0014] The 4 pins of the socket J2 are left floating; the 4 pins of the socket J3 are left floating;

[0015] Pin D3 of the plugboard J10 is connected to pin 1 of the resistor R1, pin 2 of the socket J2 and pin 2 of the socket J3 are both connected to pin 2 of the resistor R1, and pin 2 of the resistor R1, pin 2 of the socket J2, and pin 2 of the socket J3 are connected to pin 5 of the relay K1;

[0016] The D3 pin of the plugboard J10 is connected to the 1 pin of the resistor R1 and then to the 1 pin of the PLC control switch S1 and the 6 pin of the PLC control switch S1. The 1 pin of the PLC control switch S1 is connected to the 6 pin of the PLC control switch S1. The D3 pin of the plugboard J10, the 1 pin of the resistor R1, the 1 pin of the PLC control switch S1 and the 6 pin of the PLC control switch S1 are then connected to the 6 pin of the relay K1.

[0017] Pin 3 of the PLC control switch S1, pin 4 of the PLC control switch S1, pin 7 of the PLC control switch S1, and pin 8 of the PLC control switch S1 are suspended;

[0018] Pin 2 of the PLC control switch S1 is connected to pin 5 of the PLC control switch S1 and then connected to pin 2 of the resistor R3; pin 1 of the resistor R8 is connected to the positive electrode of the polarity capacitor C5 and then connected to pin 1 of the resistor R3; pin 2 of the resistor R8 is grounded, and the negative electrode of the polarity capacitor C5 is grounded.

[0019] Preferably, the second input module includes a socket J4, a socket J5, a resistor R2, a PLC control switch S2, a resistor R4, a resistor R10 and a polarity capacitor C6;

[0020] The B5 pin of the plug board J10 is connected to the B6 pin of the plug board J10 and then connected to the 3 pin of the socket J4; the B5 pin of the plug board J10 is connected to the B6 pin of the plug board J10 and then connected to the 3 pin of the socket J5;

[0021] Pin 1 of the socket J4 is grounded; Pin 1 of the socket J5 is grounded;

[0022] The 4th pin of the socket J4 is left hanging; the 4th pin of the socket J5 is left hanging;

[0023] Pin E3 of the plugboard J10 is connected to pin 1 of the resistor R2, pin 2 of the socket J4 and pin 2 of the socket J5 are both connected to pin 2 of the resistor R2, and pin 2 of the resistor R2, pin 2 of the socket J4, and pin 2 of the socket J5 are connected to pin 3 of the relay K1;

[0024] Pin E3 of the plugboard J10 is connected to pin 1 of the resistor R2 and then to pin 1 of the PLC control switch S2 and pin 6 of the PLC control switch S2. Pin 1 of the PLC control switch S2 is connected to pin 6 of the PLC control switch S2. Pin E3 of the plugboard J10, pin 1 of the resistor R2, pin 1 of the PLC control switch S2, and pin 6 of the PLC control switch S2 are connected and then to pin 2 of the relay K1.

[0025] Pin 3 of the PLC control switch S2, pin 4 of the PLC control switch S2, pin 7 of the PLC control switch S2, and pin 8 of the PLC control switch S2 are suspended;

[0026] Pin 2 of the PLC control switch S2 is connected to pin 5 of the PLC control switch S2 and then connected to pin 2 of the resistor R4; pin 1 of the resistor R10 is connected to the positive electrode of the polarity capacitor C6 and then connected to pin 1 of the resistor R4; pin 2 of the resistor R10 is grounded, and the negative electrode of the polarity capacitor C6 is grounded.

[0027] Preferably, the third input module includes a socket J6, a socket J7, a resistor R7, a PLC control switch S3, a resistor R7, a resistor R11 and a polarity capacitor C7;

[0028] The C5 pin of the plug board J10 is connected to the C6 pin of the plug board J10 and then connected to the 3 pin of the socket J6; the C5 pin of the plug board J10 is connected to the C6 pin of the plug board J10 and then connected to the 3 pin of the socket J7;

[0029] Pin 1 of the socket J6 is grounded; Pin 1 of the socket J7 is grounded;

[0030] The 4 pins of the socket J6 are left floating; the 4 pins of the socket J7 are left floating;

[0031] Pin D4 of the plugboard J10 is connected to pin 1 of the resistor R7, pin 2 of the socket J6 and pin 2 of the socket J7 are both connected to pin 2 of the resistor R7, and pin 2 of the resistor R7, pin 2 of the socket J6, and pin 2 of the socket J7 are connected to pin 12 of the relay K1;

[0032] Pin D4 of the plugboard J10 is connected to pin 1 of the resistor R7 and then to pin 1 of the PLC control switch S3 and pin 6 of the PLC control switch S3. Pin 1 of the PLC control switch S3 is connected to pin 6 of the PLC control switch S3. Pin D4 of the plugboard J10, pin 1 of the resistor R7, pin 1 of the PLC control switch S3, and pin 6 of the PLC control switch S3 are connected and then to pin 13 of the relay K1.

[0033] Pin 3 of the PLC control switch S3, pin 4 of the PLC control switch S3, pin 7 of the PLC control switch S3, and pin 8 of the PLC control switch S3 are suspended;

[0034] Pin 2 of the PLC control switch S3 is connected to pin 5 of the PLC control switch S3 and then connected to pin 2 of the resistor R7; pin 1 of the resistor R11 is connected to the positive electrode of the polarity capacitor C7 and then connected to pin 1 of the resistor R7; pin 2 of the resistor R11 is grounded, and the negative electrode of the polarity capacitor C7 is grounded.

[0035] Preferably, the fourth input module includes a socket J8, a socket J9, a resistor R9, a PLC control switch S4, a resistor R9, a resistor R12 and a polarity capacitor C8;

[0036] The D5 pin of the plug board J10 is connected to the D6 pin of the plug board J10 and then connected to the 3 pin of the socket J8; the D5 pin of the plug board J10 is connected to the D6 pin of the plug board J10 and then connected to the 3 pin of the socket J9;

[0037] Pin 1 of the socket J8 is grounded; Pin 1 of the socket J9 is grounded;

[0038] The 4 pins of the socket J8 are left hanging; the 4 pins of the socket J9 are left hanging;

[0039] Pin E4 of the plugboard J10 is connected to pin 1 of the resistor R9, pin 2 of the socket J8 and pin 2 of the socket J9 are both connected to pin 2 of the resistor R9, and pin E4 of the plugboard J10 is connected to pin 9 of the relay K1;

[0040] Pin E4 of the plugboard J10 is connected to pin 1 of the resistor R9 and then to pin 1 of the PLC control switch S4 and pin 6 of the PLC control switch S4. Pin 1 of the PLC control switch S4 is connected to pin 6 of the PLC control switch S4. Pin E4 of the plugboard J10, pin 1 of the resistor R9, pin 1 of the PLC control switch S4, and pin 6 of the PLC control switch S4 are connected and then to pin 10 of the relay K1.

[0041] Pin 3 of the PLC control switch S4, pin 4 of the PLC control switch S4, pin 7 of the PLC control switch S4, and pin 8 of the PLC control switch S4 are suspended;

[0042] Pin 2 of the PLC control switch S4 is connected to pin 5 of the PLC control switch S4 and then connected to pin 2 of the resistor R9; pin 1 of the resistor R12 is connected to the positive electrode of the polarity capacitor C8 and then connected to pin 1 of the resistor R9; pin 2 of the resistor R12 is grounded, and the negative electrode of the polarity capacitor C8 is grounded.

[0043] Preferably, the 1st and 14th pins of the relay K1 are connected to the A3 pin of the plugboard J10;

[0044] The 4th pin of the relay K1 is connected to the anode of the diode D1 and then connected to the E5 pin of the plug board J10;

[0045] The 7th and 8th pins of the relay K1 are connected to the A3 pin of the plugboard J10;

[0046] Pin 11 of the relay K1 is connected to the cathode of the diode D1 and then to pin E6 of the plugboard J10.

[0047] Beneficial effects: The onboard connection circuit for internal communication of the present application realizes the combined input and output of multiple relay controls, thereby integrating and processing multiple input signals, and accurately controlling multiple relay outputs based on preset circuits, thereby achieving efficient control and coordination of different devices or modules, effectively improving the overall reliability, flexibility and resource utilization of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0049] Figure 1 This is a circuit schematic diagram of the onboard connection circuit for internal communication provided in an embodiment of the present application. DETAILED DESCRIPTION

[0050] The following is a clear and complete description of the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0051] In this document, the term "comprising" is intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0052] This embodiment discloses Figure 1 An onboard connection circuit for internal communication shown includes a plugboard J10, a relay K1, a first input module, a second input module, a third input module, and a fourth input module;

[0053] The first input module is connected to the plugboard J10, and the first input module is also connected to the relay K1;

[0054] The second input module is connected to the plugboard J10, and the second input module is also connected to the relay K1;

[0055] The third input module is connected to the plugboard J10, and the third input module is also connected to the relay K1;

[0056] The fourth input module is connected to the plugboard J10, and the fourth input module is also connected to the relay K1.

[0057] Specifically, the first input module includes a socket J2, a socket J3, a resistor R1, a PLC control switch S1, a resistor R3, a resistor R8 and a polarity capacitor C5;

[0058] The A5 pin of the plug board J10 is connected to the A6 pin of the plug board J10, and then connected to the 3 pin of the socket J2; the A5 pin of the plug board J10 is connected to the A6 pin of the plug board J10, and then connected to the 3 pin of the socket J3;

[0059] Pin 1 of socket J2 is grounded; Pin 1 of socket J3 is grounded;

[0060] Pin 4 of socket J2 is left unconnected; Pin 4 of socket J3 is left unconnected;

[0061] Pin D3 of the socket J10 is connected to pin 1 of the resistor R1, and pin 2 of the socket J2 and pin 2 of the socket J3 are both connected to pin 2 of the resistor R1. Pin 2 of the resistor R1, pin 2 of the socket J2, and pin 2 of the socket J3 are then connected to pin 5 of the relay K1.

[0062] Pin D3 of the plugboard J10 is connected to pin 1 of the resistor R1, and then connected to pin 1 of the PLC control switch S1 and pin 6 of the PLC control switch S1. Pin 1 of the PLC control switch S1 is connected to pin 6 of the PLC control switch S1. Pin D3 of the plugboard J10, pin 1 of the resistor R1, pin 1 of the PLC control switch S1 and pin 6 of the PLC control switch S1 are connected, and then connected to pin 6 of the relay K1.

[0063] Pin 3 of the PLC control switch S1, pin 4 of the PLC control switch S1, pin 7 of the PLC control switch S1, and pin 8 of the PLC control switch S1 are left floating;

[0064] Pin 2 of the PLC control switch S1 is connected to pin 5 of the PLC control switch S1 and then to pin 2 of the resistor R3; pin 1 of the resistor R8 is connected to the positive electrode of the polarity capacitor C5 and then to pin 1 of the resistor R3; pin 2 of the resistor R8 is grounded, and the negative electrode of the polarity capacitor C5 is grounded.

[0065] Specifically, the second input module includes a socket J4, a socket J5, a resistor R2, a PLC control switch S2, a resistor R4, a resistor R10 and a polarity capacitor C6;

[0066] Connect the B5 pin of the J10 board to the B6 pin of the J10 board, and then connect to the 3 pin of the socket J4; connect the B5 pin of the J10 board to the B6 pin of the J10 board, and then connect to the 3 pin of the socket J5;

[0067] Pin 1 of socket J4 is grounded; Pin 1 of socket J5 is grounded;

[0068] Pin 4 of socket J4 is left unconnected; Pin 4 of socket J5 is left unconnected;

[0069] Pin E3 of the plugboard J10 is connected to pin 1 of the resistor R2, and pin 2 of the socket J4 and pin 2 of the socket J5 are both connected to pin 2 of the resistor R2. Pin 2 of the resistor R2, pin 2 of the socket J4, and pin 2 of the socket J5 are then connected to pin 3 of the relay K1.

[0070] Pin E3 of the plugboard J10 is connected to pin 1 of the resistor R2, and then connected to pin 1 of the PLC control switch S2 and pin 6 of the PLC control switch S2. Pin 1 of the PLC control switch S2 is connected to pin 6 of the PLC control switch S2. Pin E3 of the plugboard J10, pin 1 of the resistor R2, pin 1 of the PLC control switch S2, and pin 6 of the PLC control switch S2 are connected, and then connected to pin 2 of the relay K1.

[0071] Pin 3 of PLC control switch S2, pin 4 of PLC control switch S2, pin 7 of PLC control switch S2 and pin 8 of PLC control switch S2 are left floating;

[0072] Pin 2 of the PLC control switch S2 is connected to pin 5 of the PLC control switch S2 and then to pin 2 of the resistor R4; pin 1 of the resistor R10 is connected to the positive electrode of the polarity capacitor C6 and then to pin 1 of the resistor R4; pin 2 of the resistor R10 is grounded, and the negative electrode of the polarity capacitor C6 is grounded.

[0073] Specifically, the third input module includes a socket J6, a socket J7, a resistor R7, a PLC control switch S3, a resistor R7, a resistor R11 and a polarity capacitor C7;

[0074] The C5 pin of the plug board J10 is connected to the C6 pin of the plug board J10, and then connected to the 3 pin of the socket J6; the C5 pin of the plug board J10 is connected to the C6 pin of the plug board J10, and then connected to the 3 pin of the socket J7;

[0075] Pin 1 of socket J6 is grounded; Pin 1 of socket J7 is grounded;

[0076] Pin 4 of socket J6 is left unconnected; Pin 4 of socket J7 is left unconnected;

[0077] Pin D4 of the socket J10 is connected to pin 1 of the resistor R7, and pin 2 of the socket J6 and pin 2 of the socket J7 are both connected to pin 2 of the resistor R7. Pin 2 of the resistor R7, pin 2 of the socket J6, and pin 2 of the socket J7 are then connected to pin 12 of the relay K1.

[0078] Pin D4 of the plugboard J10 is connected to pin 1 of the resistor R7, and then to pin 1 of the PLC control switch S3 and pin 6 of the PLC control switch S3. Pin 1 of the PLC control switch S3 is connected to pin 6 of the PLC control switch S3. Pin D4 of the plugboard J10, pin 1 of the resistor R7, pin 1 of the PLC control switch S3 and pin 6 of the PLC control switch S3 are connected, and then to pin 13 of the relay K1.

[0079] Pin 3 of the PLC control switch S3, pin 4 of the PLC control switch S3, pin 7 of the PLC control switch S3, and pin 8 of the PLC control switch S3 are left floating;

[0080] Pin 2 of the PLC control switch S3 is connected to pin 5 of the PLC control switch S3 and then to pin 2 of the resistor R7; pin 1 of the resistor R11 is connected to the positive electrode of the polarity capacitor C7 and then to pin 1 of the resistor R7; pin 2 of the resistor R11 is grounded, and the negative electrode of the polarity capacitor C7 is grounded.

[0081] Specifically, the fourth input module includes a socket J8, a socket J9, a resistor R9, a PLC control switch S4, a resistor R9, a resistor R12 and a polarity capacitor C8;

[0082] The D5 pin of the plug board J10 is connected to the D6 pin of the plug board J10, and then connected to the 3 pin of the socket J8; the D5 pin of the plug board J10 is connected to the D6 pin of the plug board J10, and then connected to the 3 pin of the socket J9;

[0083] Pin 1 of socket J8 is grounded; Pin 1 of socket J9 is grounded;

[0084] Pin 4 of socket J8 is left unconnected; Pin 4 of socket J9 is left unconnected;

[0085] Pin E4 of the board J10 is connected to pin 1 of the resistor R9, pin 2 of the socket J8 and pin 2 of the socket J9 are both connected to pin 2 of the resistor R9, and pin E4 of the board J10 is connected to pin 9 of the relay K1;

[0086] Pin E4 of the plugboard J10 is connected to pin 1 of the resistor R9, and then connected to pin 1 of the PLC control switch S4 and pin 6 of the PLC control switch S4. Pin 1 of the PLC control switch S4 is connected to pin 6 of the PLC control switch S4. Pin E4 of the plugboard J10, pin 1 of the resistor R9, pin 1 of the PLC control switch S4 and pin 6 of the PLC control switch S4 are connected, and then connected to pin 10 of the relay K1.

[0087] Pin 3 of the PLC control switch S4, pin 4 of the PLC control switch S4, pin 7 of the PLC control switch S4, and pin 8 of the PLC control switch S4 are left floating;

[0088] Pin 2 of the PLC control switch S4 is connected to pin 5 of the PLC control switch S4 and then to pin 2 of the resistor R9; pin 1 of the resistor R12 is connected to the positive electrode of the polarity capacitor C8 and then to pin 1 of the resistor R9; pin 2 of the resistor R12 is grounded, and the negative electrode of the polarity capacitor C8 is grounded.

[0089] Specifically, pins 1 and 14 of relay K1 are connected to pin A3 of board J10;

[0090] Connect the 4th pin of relay K1 to the anode of diode D1 and then to the E5 pin of board J10;

[0091] Connect pins 7 and 8 of relay K1 to pin A3 of board J10;

[0092] Pin 11 of relay K1 is connected to the cathode of diode D1 and then to pin E6 of plug-in board J10.

[0093] It should be noted that, in this embodiment, the A4 pin of the plug board J10, the B2 pin of the plug board J10, the C1 pin of the plug board J10, and the D1 pin of the plug board J10 are all floating, and the B3 pin of the plug board J10, the B4 pin of the plug board J10, the C2 pin of the plug board J10, the C3 pin of the plug board J10, the C4 pin of the plug board J10, the D2 pin of the plug board J10, and the E2 pin of the plug board J10 are all grounded.

[0094] This embodiment controls the combined operation and independent operation of the first input module, the second input module, the third input module, and the fourth input module based on the relay K1 and the corresponding PLC control switches S1 to S4. When this embodiment is running, the input signals of the controlled first input module, the second input module, the third input module, and the fourth input module are output through the A1 pin of the J10 of the plugboard, the A2 pin of the J10 of the plugboard, the B1 pin of the J10 of the plugboard, and the E1 pin of the J10 of the plugboard.

[0095] In summary, the onboard connection circuit for internal communication in this embodiment realizes the combined input and output of multiple relay controls, thereby integrating and processing multiple input signals and accurately controlling multiple relay outputs based on preset circuits, thereby achieving efficient control and coordination of different devices or modules, effectively improving the overall reliability, flexibility and resource utilization of the system.

[0096] Finally, it should be noted that the above is only a preferred embodiment of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. An onboard connection circuit for internal communication, characterized in that: It includes a plugboard J10, a relay K1, a first input module, a second input module, a third input module and a fourth input module; The first input module is connected to the plugboard J10, and the first input module is also connected to the relay K1; The second input module is connected to the plugboard J10, and the second input module is also connected to the relay K1; The third input module is connected to the plugboard J10, and the third input module is also connected to the relay K1; The fourth input module is connected to the plugboard J10, and the fourth input module is also connected to the relay K1.

2. The on-board connection circuit for internal communication according to claim 1, characterized in that: The first input module includes a socket J2, a socket J3, a resistor R1, a PLC control switch S1, a resistor R3, a resistor R8 and a polarity capacitor C5; The A5 pin of the plug board J10 is connected to the A6 pin of the plug board J10 and then connected to the 3 pin of the socket J2; the A5 pin of the plug board J10 is connected to the A6 pin of the plug board J10 and then connected to the 3 pin of the socket J3; Pin 1 of the socket J2 is grounded; Pin 1 of the socket J3 is grounded; Pin 4 of the socket J2 is left floating; Pin 4 of the socket J3 is left hanging; Pin D3 of the plugboard J10 is connected to pin 1 of the resistor R1, pin 2 of the socket J2 and pin 2 of the socket J3 are both connected to pin 2 of the resistor R1, and pin 2 of the resistor R1, pin 2 of the socket J2, and pin 2 of the socket J3 are connected to pin 5 of the relay K1; The D3 pin of the plugboard J10 is connected to the 1 pin of the resistor R1 and then to the 1 pin of the PLC control switch S1 and the 6 pin of the PLC control switch S1. The 1 pin of the PLC control switch S1 is connected to the 6 pin of the PLC control switch S1. The D3 pin of the plugboard J10, the 1 pin of the resistor R1, the 1 pin of the PLC control switch S1 and the 6 pin of the PLC control switch S1 are then connected to the 6 pin of the relay K1. Pin 3 of the PLC control switch S1, pin 4 of the PLC control switch S1, pin 7 of the PLC control switch S1, and pin 8 of the PLC control switch S1 are suspended; Pin 2 of the PLC control switch S1 is connected to pin 5 of the PLC control switch S1 and then connected to pin 2 of the resistor R3; pin 1 of the resistor R8 is connected to the positive electrode of the polarity capacitor C5 and then connected to pin 1 of the resistor R3; pin 2 of the resistor R8 is grounded, and the negative electrode of the polarity capacitor C5 is grounded.

3. The on-board connection circuit for internal communication according to claim 1, characterized in that: The second input module includes a socket J4, a socket J5, a resistor R2, a PLC control switch S2, a resistor R4, a resistor R10 and a polarity capacitor C6; The B5 pin of the plug board J10 is connected to the B6 pin of the plug board J10 and then connected to the 3 pin of the socket J4; the B5 pin of the plug board J10 is connected to the B6 pin of the plug board J10 and then connected to the 3 pin of the socket J5; Pin 1 of the socket J4 is grounded; Pin 1 of the socket J5 is grounded; Pin 4 of the socket J4 is left hanging; Pin 4 of the socket J5 is left floating; Pin E3 of the plugboard J10 is connected to pin 1 of the resistor R2, pin 2 of the socket J4 and pin 2 of the socket J5 are both connected to pin 2 of the resistor R2, and pin 2 of the resistor R2, pin 2 of the socket J4, and pin 2 of the socket J5 are connected to pin 3 of the relay K1; Pin E3 of the plugboard J10 is connected to pin 1 of the resistor R2 and then to pin 1 of the PLC control switch S2 and pin 6 of the PLC control switch S2. Pin 1 of the PLC control switch S2 is connected to pin 6 of the PLC control switch S2. Pin E3 of the plugboard J10, pin 1 of the resistor R2, pin 1 of the PLC control switch S2, and pin 6 of the PLC control switch S2 are connected and then to pin 2 of the relay K1. Pin 3 of the PLC control switch S2, pin 4 of the PLC control switch S2, pin 7 of the PLC control switch S2, and pin 8 of the PLC control switch S2 are suspended; Pin 2 of the PLC control switch S2 is connected to pin 5 of the PLC control switch S2 and then connected to pin 2 of the resistor R4; pin 1 of the resistor R10 is connected to the positive electrode of the polarity capacitor C6 and then connected to pin 1 of the resistor R4; pin 2 of the resistor R10 is grounded, and the negative electrode of the polarity capacitor C6 is grounded.

4. The on-board connection circuit for internal communication according to claim 1, characterized in that: The third input module includes a socket J6, a socket J7, a resistor R7, a PLC control switch S3, a resistor R7, a resistor R11 and a polarity capacitor C7; The C5 pin of the plug board J10 is connected to the C6 pin of the plug board J10 and then connected to the 3 pin of the socket J6; the C5 pin of the plug board J10 is connected to the C6 pin of the plug board J10 and then connected to the 3 pin of the socket J7; Pin 1 of the socket J6 is grounded; Pin 1 of the socket J7 is grounded; Pin 4 of the socket J6 is left floating; Pin 4 of the socket J7 is left hanging; Pin D4 of the plugboard J10 is connected to pin 1 of the resistor R7, pin 2 of the socket J6 and pin 2 of the socket J7 are both connected to pin 2 of the resistor R7, and pin 2 of the resistor R7, pin 2 of the socket J6, and pin 2 of the socket J7 are connected to pin 12 of the relay K1; Pin D4 of the plugboard J10 is connected to pin 1 of the resistor R7 and then to pin 1 of the PLC control switch S3 and pin 6 of the PLC control switch S3. Pin 1 of the PLC control switch S3 is connected to pin 6 of the PLC control switch S3. Pin D4 of the plugboard J10, pin 1 of the resistor R7, pin 1 of the PLC control switch S3, and pin 6 of the PLC control switch S3 are connected and then to pin 13 of the relay K1. Pin 3 of the PLC control switch S3, pin 4 of the PLC control switch S3, pin 7 of the PLC control switch S3, and pin 8 of the PLC control switch S3 are suspended; Pin 2 of the PLC control switch S3 is connected to pin 5 of the PLC control switch S3 and then connected to pin 2 of the resistor R7; pin 1 of the resistor R11 is connected to the positive electrode of the polarity capacitor C7 and then connected to pin 1 of the resistor R7; pin 2 of the resistor R11 is grounded, and the negative electrode of the polarity capacitor C7 is grounded.

5. The on-board connection circuit for internal communication according to claim 1, characterized in that: The fourth input module includes a socket J8, a socket J9, a resistor R9, a PLC control switch S4, a resistor R9, a resistor R12 and a polarity capacitor C8; The D5 pin of the plug board J10 is connected to the D6 pin of the plug board J10 and then connected to the 3 pin of the socket J8; the D5 pin of the plug board J10 is connected to the D6 pin of the plug board J10 and then connected to the 3 pin of the socket J9; Pin 1 of the socket J8 is grounded; Pin 1 of the socket J9 is grounded; Pin 4 of the socket J8 is left hanging; Pin 4 of the socket J9 is left floating; Pin E4 of the plugboard J10 is connected to pin 1 of the resistor R9, pin 2 of the socket J8 and pin 2 of the socket J9 are both connected to pin 2 of the resistor R9, and pin E4 of the plugboard J10 is connected to pin 9 of the relay K1; Pin E4 of the plugboard J10 is connected to pin 1 of the resistor R9 and then to pin 1 of the PLC control switch S4 and pin 6 of the PLC control switch S4. Pin 1 of the PLC control switch S4 is connected to pin 6 of the PLC control switch S4. Pin E4 of the plugboard J10, pin 1 of the resistor R9, pin 1 of the PLC control switch S4, and pin 6 of the PLC control switch S4 are connected and then to pin 10 of the relay K1. Pin 3 of the PLC control switch S4, pin 4 of the PLC control switch S4, pin 7 of the PLC control switch S4, and pin 8 of the PLC control switch S4 are suspended; Pin 2 of the PLC control switch S4 is connected to pin 5 of the PLC control switch S4 and then connected to pin 2 of the resistor R9; pin 1 of the resistor R12 is connected to the positive electrode of the polarity capacitor C8 and then connected to pin 1 of the resistor R9; pin 2 of the resistor R12 is grounded, and the negative electrode of the polarity capacitor C8 is grounded.

6. The on-board connection circuit for internal communication according to claim 1, characterized in that: The 1st and 14th pins of the relay K1 are connected to the A3 pin of the plugboard J10; The 4th pin of the relay K1 is connected to the anode of the diode D1 and then connected to the E5 pin of the plug board J10; The 7th and 8th pins of the relay K1 are connected to the A3 pin of the plugboard J10; Pin 11 of the relay K1 is connected to the cathode of the diode D1 and then to pin E6 of the plugboard J10.

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