Compact relay control module

Abstract

The invention relates to the technical field of relay control, in particular to a compact relay control module. The printed board level PCB and the indicator are arranged on the metal shell, and an MCU controller, a power supply assembly, a communication assembly, a switch signal detection assembly, a relay output control circuit, a data storage circuit and an LED indicating circuit are arranged in the metal shell. According to the invention, the DC / DC power supply module is converted into a 5V power supply after being processed by the anti-reverse-connection filter circuit, and meanwhile, 1.8 V and 3.3 V power supplies are provided by the linear power supply circuit. The switch input signal detection circuit detects a 24V high-level effective signal, the relay output control circuit controls a normally open contact of the relay, and the control module is highly integrated, compact in size, better in adaptability and capable of being applied to a narrow space working environment.

Description

Technical Field

[0001] The invention relates to the technical field of relay control, and in particular to a compact relay control module. Background Art

[0002] A relay is an electrical control device. When the change in input quantity or excitation quantity reaches the specified requirement, it causes a predetermined step change in the controlled quantity in the electrical output circuit. Relay control refers to the use of relays to achieve automatic control, protection, and regulation of circuits.

[0003] For example, CN208208657U involves an independently controlled integrated relay control module, including a PCB circuit board fixed in a plastic shell; the PCB circuit board is fixed on a plastic bottom shell, on which a plurality of relay sockets are arranged, and relays are plugged into the relay sockets; relay coil terminals are arranged on the PCB circuit board, and the relay coil terminals include 0V terminals and 24V terminals independently corresponding to each relay, the positive pin of the coil of each relay is connected to the corresponding 24V terminal, and the negative pin of the coil of the relay is connected to the 0V terminal.

[0004] The above-mentioned relay control module saves installation space and makes wiring simple and quick by integrating several relays on a PCB circuit board; each relay has independent corresponding 0V terminal and 24V terminal, realizing complete independent control of each relay control coil. However, this method of using multiple modules also makes the control module larger in size and cannot adapt to a small working environment.

[0005] In order to reduce the size so as to be applicable to a narrow space working environment, a compact relay control module is proposed. Summary of the invention

[0006] The object of the present invention is to provide a compact relay control module to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides a compact relay control module, comprising a metal housing, a printed circuit board (PCB) and an indicator arranged on the metal housing, wherein an MCU controller, a power supply component, a communication component, a switch signal detection component, a relay output control circuit, a data storage circuit and an LED indication circuit are arranged in the metal housing, the power supply component is used for power supply, the switch signal detection component is connected to the MCU controller, the MCU controller is connected to the relay output control circuit, the data storage circuit and the LED indication circuit, and the MCU controller is bidirectionally connected to the communication component; The MCU controller exchanges data with the outside through the communication component. The MCU controller also detects the 24V high-level valid signal through the switch signal detection component, and controls the relay output control circuit to control the normally open contact of the relay.

[0008] As a further improvement of the present technical solution, the power supply component includes an anti-reverse connection filter circuit, a power supply circuit and an LDO circuit, one end of the anti-reverse connection filter circuit is connected to a DC power supply input, the other end of the anti-reverse connection filter circuit is connected to the power supply circuit, and the power supply circuit is connected to the LDO circuit.

[0009] As a further improvement of the technical solution, the anti-reverse connection filter circuit includes inductors L7, L8, and L9, and the power supply circuit includes a chip U6; One end of the inductor L7 is connected to capacitors C120, C123, C130, diode F6 and fuse F5, and the other end of the inductor L7 is connected to capacitor C127 and pin 1 of the inductor L9; One end of the inductor L8 is connected to the other end of the capacitor C120, the other end of the capacitor C123, the other end of the capacitor C130, the other end of the diode F5, the capacitor C131 and grounded, and the other end of the inductor L8 is connected to pin 2 of the inductor L9 and the other end of the capacitor C127; The fuse F5 is connected to the diode V1, the diode V1 is connected to the capacitor C119 and connected to the DC24V_IN+ terminal, and the capacitor C119 is grounded; Pin 3 of the inductor L9 is connected to capacitors C124, C125, C126, C128, and C129 and grounded, and pin 4 of the inductor L9 is connected to the other end of the capacitor C124, the other end of the capacitor C125, the other end of the capacitor C126, the other end of the capacitor C128, and the other end of the capacitor C129 and connected to the +24V terminal in parallel; Pin 2 of the chip U6 is connected to capacitor C132 and grounded, and the capacitor C132 is grounded; Pin 3 of the chip U6 is connected to capacitor C121 and connected to the +24V terminal, and the capacitor C121 is grounded; Pin 4 of the chip U6 is connected to capacitors C122, C135, C140, C141, C142, and C143 and connected to the +5.0V terminal, and the capacitor C122 is grounded; Pin 5 of the chip U6 is connected to capacitor C133, the other end of capacitor C135, the other end of capacitor C140, the other end of capacitor C141, the other end of capacitor C142, the other end of capacitor C143 and grounded, and capacitor C133 is grounded.

[0010] As a further improvement of the technical solution, the switch signal detection component includes a switch signal detection circuit, and the switch signal detection circuit includes an optical coupler E1, Pin 1 of the optical coupler E1 is connected to resistors R40 and R45 and capacitor C154; Pin 2 of the optical coupler E1 is connected to the other end of the resistor R45 and is also connected to the other end of the capacitor C154; Pin 3 of the optical coupler E1 is connected to capacitor C159 and grounded; The 4th pin of the optical coupler E1 is connected to the resistor R35, the other end of the capacitor C159 is connected in parallel to the E_IN1 terminal, and the resistor R35 is connected to the +3.3V terminal.

[0011] As a further improvement of the technical solution, the relay output control circuit includes an optical coupler E33, Pin 1 of the optical coupler E33 is connected to a resistor R131, and the resistor R131 is connected to a +3.3V terminal; Pin 2 of the optical coupler E33 is connected to the Output 1 terminal; Pin 3 of the optical coupler E33 is connected to the resistor R147, the capacitor C128 and the base of the transistor Q1, the emitter of the transistor Q1 is connected to the other end of the resistor R147, the other end of the capacitor C218, the diode V2 and grounded, the collector of the transistor is connected to the contact 2 of the relay K1 and the diode V2, and the diode V2 is connected to the +5.0V terminal; Pin 4 of the optical coupler E33 is connected to a resistor R139, the resistor R139 is connected to contact 1 of the relay K1 and to the +5.0V terminal, contact 3 of the relay K1 is connected to the CK1 terminal, and contact 4 of the relay K1 is connected to the COM terminal.

[0012] As a further improvement of the present technical solution, the communication component includes an Internet port communication circuit bidirectionally connected to the MCU controller, an isolated RS485 communication circuit, and an isolated CAN communication circuit.

[0013] As a further improvement of the technical solution, the network port communication circuit includes chips U4, F4, and T1, wherein: Pins 2, 12, 17, 29, 40, 45 and 63 of the chip U4 are all connected to the +3.3V terminal, the +3.3V terminal is connected to resistors R26, R27, R28 and R29, the resistor R26 is connected to capacitor C93, the resistor R27 is connected to capacitor C103, the resistor R28 is connected to capacitor C104, the resistor R29 is connected to capacitor C106, the capacitor C93 is connected to the other end of the capacitor C103, the other end of the capacitor C104 and the other end of the capacitor C106 and grounded; Pins 6, 19, 28, 43, 54 and 64 of the chip U4 are all connected to the +1.8V terminal; Pin 1 of the chip U4 is connected to a resistor R25, and the resistor R25 is grounded; Pin 27 of the chip U4 is connected to a resistor R33, and the resistor R33 is grounded; Pin 58 of the chip U4 is connected to a resistor R24, and the resistor R24 ​​is grounded; Pin 36 of the chip U4 is connected to capacitor C108 and connected to the ETH_RSTI terminal, and the capacitor C108 is grounded; Pins 3, 9, 13, 18, 20, 37, 41, 44 and 48 of the chip U4 are all grounded; Pin 4 of the chip U4 is connected to U3_RX_P, pin 5 is connected to U3_RX_N, pin 7 is connected to U3_TX_P, pin 8 is connected to U3_TX_N, pin 25 is connected to ETH_RDY#, pin 26 is connected to ETH_RST, pin 49 is connected to ETH_INT#, pin 52 is connected to ETH_LINK#, pin 59 is connected to ETH_NSS, pin 60 is connected to ETH_SCK, pin 61 is connected to ETH_MOSI, and pin 62 is connected to ETH_MISO; Pin 1 of the chip F4 is connected to the TX_P terminal, pin 2 is connected to the TX_N terminal, pin 3 is connected to the RX_P terminal, and pin 4 is connected to the RX_N terminal; The 5th pin of the chip F4 is connected to the NET_RX_N terminal, the 6th pin is connected to the NET_RX_P terminal, the 7th pin is connected to the NET_TX_N terminal, and the 8th pin is connected to the NET_TX_P terminal; Pin 1 of the chip T1 is connected to U3_TX_P, pin 3 is connected to U3_TX_N, pin 6 is connected to U3_RX_P, pin 8 is connected to U3_RX_N, pin 9 is connected to RX_N, pin 11 is connected to RX_P, pin 14 is connected to TX_N, and pin 16 is connected to TX_P; Pins 2 and 7 of the chip T1 are connected to capacitors C109, C111, and C112 and inductor L6, the capacitors C109, C111, and C112 are grounded, and the inductor L6 is connected to the +3.3V terminal; Pin 10 of the chip T1 is connected to resistor R32, pin 15 of the chip T1 is connected to resistor R30, the resistor R30 is connected to the other end of the resistor R32 and connected to capacitor C110, the capacitor C110 is connected to resistor R31, and the resistor R31 is grounded.

[0014] As a further improvement of the technical solution, the isolated RS485 communication circuit includes a chip U2 and an inductor L3. Pin 1 of the chip U2 is connected to the +5.0V_RS485 terminal, the +5.0V_RS485 terminal is connected to capacitors C63, C64, C67, C68 and in parallel to inductor L4, the capacitors C63, C64, C67, C68 are all grounded, and the inductor L4 is connected to the +5.0V terminal; Pins 2, 7, 8, 9, 10 and 15 of the chip U2 are all grounded; Pin 3 of the chip U2 is connected to resistor R19, the resistor R19 is connected to resistor R18 and connected to the RS485_RXD2 terminal, and the resistor R18 is grounded; Pin 4 of the chip U2 is connected to the RS485_RE2 terminal, pin 5 is connected to the RS485_DE2 terminal, and pin 6 is connected to the RS485_TXD2 terminal; Pin 12 of the chip U2 is connected to pin 2 of the inductor L3, pin 13 of the chip U2 is connected to pin 1 of the inductor L3, pin 3 of the inductor L3 is connected to diode F2, resistor R20 and RS485_2_A terminal, pin 4 of the inductor L3 is connected to diode F2, the other end of resistor R20 and RS485_2_B terminal, and the diode F2 is grounded; Pin 16 of the chip U2 is connected to the RS485_2.5V terminal, the RS485_2.5V terminal is connected to capacitors C65, C66, C69, and C70, and the capacitors C65, C66, C69, and C70 are all grounded.

[0015] As a further improvement of the technical solution, the isolated CAN communication circuit includes a chip U1 and an inductor L1. Pin 1 of the chip U1 is connected to the +5.0V_CAN terminal, the +5.0V_CAN is connected to capacitors C54, C55, C58, C59 and inductor L2, the capacitors C54, C55, C58, C59 are all grounded, and the inductor L2 is connected to the +5.0V terminal; Pins 2, 8, 9, 10 and 15 of the chip U1 are all grounded; Pin 3 of the chip U1 is connected to the CAN1_TXD terminal; Pin 5 of the chip U1 is connected to a resistor R14, the resistor R14 is connected to a resistor R17 and connected to the CAN1_RXD terminal, and the resistor R17 is grounded; Pin 12 of the chip U1 is connected to pin 2 of the inductor L1, pin 13 of the chip U1 is connected to pin 1 of the inductor L1, pin 3 of the inductor L1 is connected to diode F1, resistor R15 and connected to the CAN1_L terminal, and pin 4 of the inductor L1 is connected to the diode F1 and the other end of the resistor R15 and connected to the CAN1_H terminal; Pin 16 of the chip U1 is connected to the CAN_2.5V terminal, the CAN_2.5V terminal is connected to capacitors C56, C57, C60, and C61, and the capacitors C56, C57, C60, and C61 are all grounded.

[0016] Compared with the prior art, the present invention has the following beneficial effects: In this compact relay control module, the DC / DC power module is converted into a 5V power supply after being processed by the anti-reverse connection filter circuit. At the same time, 1.8V and 3.3V power supplies are provided through the linear power supply circuit. The switch input signal detection circuit detects a 24V high-level valid signal, and the relay output control circuit controls the normally open contact of the relay. This control module is highly integrated, compact in size, and has better adaptability, and can be used in a small space working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall appearance of the present invention; Figure 2 It is a schematic diagram of the overall structure of the present invention; Figure 3 The anti-reverse connection filtering circuit diagram of the present invention; Figure 4 is a power supply circuit diagram of the present invention; Figure 5 The switch signal detection circuit diagram of the present invention; Figure 6 It is a relay output control circuit diagram of the present invention; Figure 7 The network port communication circuit of the present invention Figure 1 ; Figure 8 The network port communication circuit of the present invention Figure 2 ; Fig. 9 The network port communication circuit of the present invention Figure 3 ; Fig.10 The network port communication circuit of the present invention Figure 4 ; Fig.11 The isolated RS485 communication circuit of the present invention Figure 1 ; Fig.12 The isolated RS485 communication circuit of the present invention Figure 2 ; Fig.13 The isolated RS485 communication circuit of the present invention Figure 3 ; Fig.14 The isolated CAN communication circuit of the present invention Figure 1 ; Fig.15The isolated CAN communication circuit of the present invention Figure 2 ; Fig.16 The isolated CAN communication circuit of the present invention Figure 3 .

[0018] The meaning of each number in the figure is: 1. Metal casing; 2. X1 connector; 3. X2 connector; 4. X3 connector; 5. X4 connector; 6. X5 connector; 7. Power indicator light; 8. Operation indicator light; 9. Communication indicator light. DETAILED DESCRIPTION

[0019] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0021] Most of the electronic components in existing control modules are imported. Once the external situation changes, the reliability and stability of imported components will be greatly affected, making it impossible to achieve independent control. The existing control module is large in size and requires multiple modules to be used in combination, which cannot adapt to a small working environment. In addition, the operating environment of the existing control module is generally -20℃~+50℃, which cannot adapt to harsh working environments.

[0022] Therefore, please refer to Figure 1-Figure 16As shown, the purpose of this embodiment is to provide a compact relay control module, including a metal housing 1 and a printed circuit board level PCB and an indicator arranged on the metal housing 1, the printed circuit board level PCB includes an X1 connector 2, an X2 connector 3, an X3 connector 4, an X4 connector 5, and an X5 connector 6, the indicator includes a power indicator light 7, an operation indicator light 8, and a communication indicator light 9, and an MCU controller, a power supply component, a communication component, a switch signal detection component, a relay output control circuit, a data storage circuit, and an LED indication circuit are arranged in the metal housing 1, the power supply component is used for power supply, the switch signal detection component is connected to the MCU controller, the MCU controller is connected to the relay output control circuit, the data storage circuit, and the LED indication circuit, and the MCU controller is bidirectionally connected to the communication component; The MCU controller exchanges data with the outside through the communication component. The MCU controller also detects the 24V high-level valid signal through the switch signal detection component, and controls the relay output control circuit to control the normally open contact of the relay.

[0023] The connector interface model and pin definitions of the control module in this embodiment are as follows: X1 connector 2 is mainly used for power input interface, RS485, and CAN network interface. Its pin definitions are as follows: 1: 24V_IN+; 2: 24V_IN_GND; 3: CAN_L; 4: CAN_GND; 5: / ; 6: RS485_1_A; 7: RS485_1_GND; 8: RS485_2_B; 9: NET_TX+; 10: NET_RX+; 20: NET_RX-; 11: 24V_IN+; 12: 24V_IN_GND; 13: CAN _H; 14: / ; 15: / ; 16: RS485_1_B; 17: RS485_2_A; 18: RS485_2_GND; 19: NET_TX-; 20: NET_RX-.

[0024] X2 connector 3 is mainly used for switch signal 1-16 input interface, and its pin definition is as follows: 1: Input switch signal 1; 2: Input switch signal 3; 3: Input switch signal 5; 4: Input switch signal 7; 5: Input switch signal 9; 6: Input switch signal 11; 7: Input switch signal 13; 8: Input switch signal 15; 9: Input switch signal ground; 10: Input switch signal ground; 11: Input switch signal 2; 12: Input switch signal 4; 13: Input switch signal 5; 14: Input switch signal 8; 15: Input switch signal 10; 16: Input switch signal 12; 17: Input switch signal 14; 18: Input switch signal 16; 19: Input switch signal ground; 20: Input switch signal ground.

[0025] X3 connector 4 is mainly used for switch signal 17-32 input interface, and its pin definition is as follows: 1: Input switch signal 17; 2: Input switch signal 19; 3: Input switch signal 21; 4: Input switch signal 23; 5: Input switch signal 25; 6: Input switch signal 27; 7: Input switch signal 29; 8: Input switch signal 31; 9: Input switch signal ground; 10: Input switch signal ground; 11: Input switch signal 18; 12: Input switch signal 20; 13: Input switch signal 22; 14: Input switch signal 24; 15: Input switch signal 26; 16: Input switch signal 28; 17: Input switch signal 30; 18: Input switch signal 32; 19: Input switch signal ground; 20: Input switch signal ground.

[0026] X4 connector 5 is mainly used for relay output 1-20 interface, and its pin definition is as follows: 1: Relay output CK1; 2: Relay output CK3; 3: Relay output CK5; 4: Relay output CK7; 5: Relay output CK9; 6: Relay output CK11; 7: Relay output CK13; 8: Relay output CK15; 9: Relay output CK17; 10: Relay output CK19; 11: Relay output COM; 12: Relay output COM; 13: Relay output COM; 14: Relay output COM; 15: Relay output COM; 16: Relay output CK2; 17: Relay output CK4; 18: Relay output CK6; 19: Relay output CK8; 20: Relay output CK10; 21: Relay output CK12; 22: Relay output CK14; 23: Relay output CK16; 24: Relay output CK18; 25: Relay output CK20; 26: Relay output COM; 27: Relay output COM; 28: Relay output COM; 29: Relay output COM; 30: Relay output COM.

[0027] X5 connector 6 is mainly used for relay output 21-40 interface, and its pin definition is as follows: 1: Relay output CK21; 2: Relay output CK23; 3: Relay output CK25; 4: Relay output CK27; 5: Relay output CK29; 6: Relay output CK31; 7: Relay output CK33; 8: Relay output CK35; 9: Relay output CK37; 10: Relay output CK39; 11: Relay output COM; 12: Relay output COM; 13: Relay output COM; 14: Relay output COM; 15: Relay output COM; 16: Relay output CK22; 17: Relay output CK24; 18: Relay output CK26; 19: Relay output CK28; 20: Relay output CK30; 21: Relay output CK32; 22: Relay output CK34; 23: Relay output CK36; 24: Relay output CK38; 25: Relay output CK40; 26: Relay output COM; 27: Relay output COM; 28: Relay output COM; 29: Relay output COM; 30: Relay output COM.

[0028] The power supply component includes an anti-reverse connection filter circuit, a 24V / 5V power supply circuit and an LDO circuit. One end of the anti-reverse connection filter circuit is connected to a DC power supply input, and the other end of the anti-reverse connection filter circuit is connected to the 24V / 5V power supply circuit. The 24V / 5V power supply circuit is connected to the LDO circuit, and the LDO circuit provides power for each circuit in the control module.

[0029] The anti-reverse connection filter circuit includes inductors L7, L8, and L9, and the 24V / 5V power supply circuit includes chip U6; One end of the inductor L7 is connected to capacitors C120, C123, C130, diode F6 and fuse F5, and the other end of the inductor L7 is connected to capacitor C127 and pin 1 of the inductor L9; One end of the inductor L8 is connected to the other end of the capacitor C120, the other end of the capacitor C123, the other end of the capacitor C130, the other end of the diode F5, the capacitor C131 and grounded, and the other end of the inductor L8 is connected to pin 2 of the inductor L9 and the other end of the capacitor C127; Fuse F5 is connected to diode V1, diode V1 is connected to capacitor C119 and connected to DC24V_IN+ terminal, capacitor C119 is grounded; Pin 3 of inductor L9 is connected to capacitors C124, C125, C126, C128, and C129 and grounded, and pin 4 of inductor L9 is connected to the other end of capacitor C124, the other end of capacitor C125, the other end of capacitor C126, the other end of capacitor C128, and the other end of capacitor C129 and connected to the +24V terminal; Pin 2 of chip U6 is connected to capacitor C132 and grounded, and capacitor C132 is grounded; Pin 3 of chip U6 is connected to capacitor C121 and connected to the +24V terminal, and capacitor C121 is grounded; Pin 4 of chip U6 is connected to capacitors C122, C135, C140, C141, C142, and C143 and connected to the +5.0V terminal, and capacitor C122 is grounded; Pin 5 of chip U6 is connected to capacitor C133, the other end of capacitor C135, the other end of capacitor C140, the other end of capacitor C141, the other end of capacitor C142, the other end of capacitor C143 and grounded, and capacitor C133 is grounded.

[0030] The power supply part converts the external DC18V to DC32V input.

[0031] The power supply component uses a diode to provide anti-reverse protection for the circuit and a series fuse short-circuit design, and uses a Π-type third-order filter for filtering. It then uses an isolated 9V-36V wide-range input 15W power supply module to generate the DC5V working voltage required by the motherboard.

[0032] The switch signal detection component includes a switch signal detection circuit connected to the X2 connector 3, and the switch signal detection circuit includes an optical coupler E1, Pin 1 of optocoupler E1 is connected to resistors R40 and R45 and capacitor C154; Pin 2 of optocoupler E1 is connected to the other end of resistor R45 and in parallel to the other end of capacitor C154; Pin 3 of optocoupler E1 is connected to capacitor C159 and grounded; Pin 4 of the optocoupler E1 is connected to resistor R35, the other end of capacitor C159 is connected in parallel to the E_IN1 terminal, and resistor R35 is connected to the +3.3V terminal.

[0033] The switch signal is isolated by an optocoupler circuit, and a 24V high level is effective. In this embodiment, a 32-way switch signal detection circuit is designed.

[0034] The switch input signal wiring is that one end of the switch is connected to the positive pole of the power supply, and the other end is connected to the pins of the X2 connector and X3 connector of the control module; the negative pole of the power supply is connected to the pins of the X2 connector and X3 connector of the control module. When the switch input signal detection circuit detects a 24V high-level signal, a valid signal is detected.

[0035] The relay output control circuit includes an optocoupler E33, Pin 1 of the optocoupler E33 is connected to resistor R131, and resistor R131 is connected to the +3.3V terminal; Connect pin 2 of optocoupler E33 to Output1; Pin 3 of optocoupler E33 is connected to resistor R147, capacitor C128 and the base of transistor Q1, the emitter of transistor Q1 is connected to the other end of resistor R147, the other end of capacitor C218, diode V2 and grounded, the collector of transistor is connected to contact 2 of relay K1 and diode V2, diode V2 is connected to +5.0V terminal; Pin 4 of the optocoupler E33 is connected to resistor R139, resistor R139 is connected to contact 1 of relay K1 and to the +5.0V terminal, contact 3 of relay K1 is connected to the CK1 terminal, and contact 4 of relay K1 is connected to the COM terminal.

[0036] The MCU controller controls the relay through the optocoupler and transistor. The MCU controller gives a low-level signal, the optocoupler turns on, causing the transistor to turn on, forming a relay coil loop current, and the relay normally open contact is energized. The relay output circuit provides the relay common point COM and the normally open contact. Refer to the corresponding wiring pins of the control module X4 connector and X5 connector for wiring.

[0037] The communication component includes an Ethernet communication circuit bidirectionally connected to the MCU controller, an isolated RS485 communication circuit, and an isolated CAN communication circuit.

[0038] The network port communication circuit includes chips U4, F4, and T1, among which: Pins 2, 12, 17, 29, 40, 45 and 63 of chip U4 are all connected to the +3.3V terminal, the +3.3V terminal is connected to resistors R26, R27, R28 and R29, resistor R26 is connected to capacitor C93, resistor R27 is connected to capacitor C103, resistor R28 is connected to capacitor C104, resistor R29 is connected to capacitor C106, capacitor C93 is connected to the other end of capacitor C103, the other end of capacitor C104 and the other end of capacitor C106 and grounded; Pins 6, 19, 28, 43, 54, and 64 of chip U4 are all connected to the +1.8V terminal; Pin 1 of chip U4 is connected to resistor R25, and resistor R25 is grounded; Pin 27 of chip U4 is connected to resistor R33, and resistor R33 is grounded; Pin 58 of chip U4 is connected to resistor R24, and resistor R24 ​​is grounded; Pin 36 of chip U4 is connected to capacitor C108 and connected to the ETH_RSTI terminal, and capacitor C108 is grounded; Pins 3, 9, 13, 18, 20, 37, 41, 44, and 48 of chip U4 are all grounded; Pin 4 of chip U4 is connected to U3_RX_P, pin 5 is connected to U3_RX_N, pin 7 is connected to U3_TX_P, pin 8 is connected to U3_TX_N, pin 25 is connected to ETH_RDY#, pin 26 is connected to ETH_RST, pin 49 is connected to ETH_INT#, pin 52 is connected to ETH_LINK#, pin 59 is connected to ETH_NSS, pin 60 is connected to ETH_SCK, pin 61 is connected to ETH_MOSI, and pin 62 is connected to ETH_MISO; Pin 1 of chip F4 is connected to TX_P, pin 2 is connected to TX_N, pin 3 is connected to RX_P, and pin 4 is connected to RX_N. Pin 5 of chip F4 is connected to NET_RX_N, pin 6 is connected to NET_RX_P, pin 7 is connected to NET_TX_N, and pin 8 is connected to NET_TX_P. Pin 1 of chip T1 is connected to U3_TX_P, pin 3 is connected to U3_TX_N, pin 6 is connected to U3_RX_P, pin 8 is connected to U3_RX_N, pin 9 is connected to RX_N, pin 11 is connected to RX_P, pin 14 is connected to TX_N, and pin 16 is connected to TX_P; Pins 2 and 7 of chip T1 are connected to capacitors C109, C111, C112 and inductor L6, capacitors C109, C111, C112 are grounded, and inductor L6 is connected to the +3.3V terminal; Pin 10 of chip T1 is connected to resistor R32, pin 15 of chip T1 is connected to resistor R30, resistor R30 is connected to the other end of resistor R32 and connected to capacitor C110, capacitor C110 is connected to resistor R31, and resistor R31 is grounded.

[0039] The control module performs network transmission through SPI to 10M / 100M network chip and network transformer, providing 1-way network data transmission.

[0040] The isolated RS485 communication circuit includes chip U2 and inductor L3. Pin 1 of chip U2 is connected to the +5.0V_RS485 terminal, the +5.0V_RS485 terminal is connected to capacitors C63, C64, C67, C68 and inductor L4, capacitors C63, C64, C67, C68 are all grounded, and inductor L4 is connected to the +5.0V terminal; Pins 2, 7, 8, 9, 10, and 15 of chip U2 are all grounded; Pin 3 of chip U2 is connected to resistor R19, resistor R19 is connected to resistor R18 and connected to RS485_RXD2 terminal, and resistor R18 is grounded; Pin 4 of chip U2 is connected to RS485_RE2, pin 5 is connected to RS485_DE2, and pin 6 is connected to RS485_TXD2; Pin 12 of chip U2 is connected to pin 2 of inductor L3, pin 13 of chip U2 is connected to pin 1 of inductor L3, pin 3 of inductor L3 is connected to diode F2, resistor R20 and connected to RS485_2_A terminal, pin 4 of inductor L3 is connected to diode F2, the other end of resistor R20 and connected to RS485_2_B terminal, and diode F2 is grounded; Pin 16 of chip U2 is connected to the RS485_2.5V terminal, the RS485_2.5V terminal is connected to capacitors C65, C66, C69, and C70, and capacitors C65, C66, C69, and C70 are all grounded.

[0041] The control module communicates RS485 bus data through an isolated transceiver. The isolated transceiver is an isolated physical layer transceiver with an internal isolated DC-DC converter.

[0042] The isolated CAN communication circuit includes chip U1 and inductor L1. Pin 1 of chip U1 is connected to +5.0V_CAN terminal, +5.0V_CAN is connected to capacitors C54, C55, C58, C59 and inductor L2, capacitors C54, C55, C58, C59 are all grounded, and inductor L2 is connected to +5.0V terminal; Pins 2, 8, 9, 10, and 15 of chip U1 are all grounded; Pin 3 of chip U1 is connected to CAN1_TXD terminal; Pin 5 of chip U1 is connected to resistor R14, resistor R14 is connected to resistor R17 and connected to the CAN1_RXD terminal, and resistor R17 is grounded; Pin 12 of chip U1 is connected to pin 2 of inductor L1, pin 13 of chip U1 is connected to pin 1 of inductor L1, pin 3 of inductor L1 is connected to diode F1, resistor R15 and connected to CAN1_L terminal, and pin 4 of inductor L1 is connected to diode F1, the other end of resistor R15 and connected to CAN1_H terminal; Pin 16 of chip U1 is connected to the CAN_2.5V terminal, the CAN_2.5V terminal is connected to capacitors C56, C57, C60, and C61, and capacitors C56, C57, C60, and C61 are all grounded.

[0043] The control module communicates CAN bus data through an isolated transceiver. The isolated transceiver is an isolated control area network (CAN) physical layer transceiver with an internal isolated DC-DC converter.

[0044] In summary, when the control module of this embodiment is connected to a 24V DC power supply, the DC / DC power supply module is converted into a 5V power supply after being processed by the anti-reverse connection filter circuit. At the same time, 1.8V and 3.3V power supplies are provided through the linear power supply circuit. The switch input signal detection circuit detects a 24V high-level effective signal, and the relay output control circuit controls the normally open contact of the relay; the control modules can communicate with the CAN and RS485 buses, and can also exchange data with the host computer through CAN, RS485, and the network port.

[0045] This control module uses domestically produced components to reduce the constraints caused by import factors, has independent controllable capabilities, realizes technological innovation, and improves competitiveness; the imported control module with the same function has a size of 380mm×135mm×81mm, and requires multiple modules to be combined, which reduces reliability. This control module is highly integrated and has a size of 235mm×120mm×40mm with the same function. It is compact and has better adaptability; 3. This control module can work normally in an environment of -40℃~+55℃, and has stronger high and low temperature working performance.

[0046] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A compact relay control module, characterized in that: Comprising a metal housing (1) and a printed circuit board (PCB) and an indicator arranged on the metal housing (1), wherein an MCU controller, a power supply component, a communication component, a switch signal detection component, a relay output control circuit, a data storage circuit and an LED indication circuit are arranged in the metal housing (1), wherein the power supply component is used for supplying power, the switch signal detection component is connected to the MCU controller, the MCU controller is connected to the relay output control circuit, the data storage circuit and the LED indication circuit, and the MCU controller is bidirectionally connected to the communication component; The MCU controller exchanges data with the outside through the communication component. The MCU controller also detects the 24V high-level valid signal through the switch signal detection component, and controls the relay output control circuit to control the normally open contact of the relay.

2. The compact relay control module according to claim 1, characterized in that: The power supply component includes an anti-reverse connection filter circuit, a power supply circuit and an LDO circuit. One end of the anti-reverse connection filter circuit is connected to a DC power supply input, and the other end of the anti-reverse connection filter circuit is connected to the power supply circuit. The power supply circuit is connected to the LDO circuit.

3. The compact relay control module according to claim 2, characterized in that: The anti-reverse connection filter circuit includes inductors L7, L8, and L9, and the power supply circuit includes a chip U6; One end of the inductor L7 is connected to capacitors C120, C123, C130, diode F6 and fuse F5, and the other end of the inductor L7 is connected to capacitor C127 and pin 1 of the inductor L9; One end of the inductor L8 is connected to the other end of the capacitor C120, the other end of the capacitor C123, the other end of the capacitor C130, the other end of the diode F5, the capacitor C131 and grounded, and the other end of the inductor L8 is connected to pin 2 of the inductor L9 and the other end of the capacitor C127; The fuse F5 is connected to the diode V1, the diode V1 is connected to the capacitor C119 and connected to the DC24V_IN+ terminal, and the capacitor C119 is grounded; Pin 3 of the inductor L9 is connected to capacitors C124, C125, C126, C128, and C129 and grounded, and pin 4 of the inductor L9 is connected to the other end of the capacitor C124, the other end of the capacitor C125, the other end of the capacitor C126, the other end of the capacitor C128, and the other end of the capacitor C129 and connected to the +24V terminal in parallel; Pin 2 of the chip U6 is connected to capacitor C132 and grounded, and the capacitor C132 is grounded; Pin 3 of the chip U6 is connected to capacitor C121 and connected to the +24V terminal, and the capacitor C121 is grounded; Pin 4 of the chip U6 is connected to capacitors C122, C135, C140, C141, C142, and C143 and connected to the +5.0V terminal, and the capacitor C122 is grounded; Pin 5 of the chip U6 is connected to capacitor C133, the other end of capacitor C135, the other end of capacitor C140, the other end of capacitor C141, the other end of capacitor C142, the other end of capacitor C143 and grounded, and capacitor C133 is grounded.

4. The compact relay control module according to claim 1, characterized in that: The switch signal detection component includes a switch signal detection circuit, and the switch signal detection circuit includes an optical coupler E1, Pin 1 of the optical coupler E1 is connected to resistors R40 and R45 and capacitor C154; Pin 2 of the optical coupler E1 is connected to the other end of the resistor R45 and is also connected to the other end of the capacitor C154; Pin 3 of the optical coupler E1 is connected to capacitor C159 and grounded; The 4th pin of the optical coupler E1 is connected to the resistor R35, the other end of the capacitor C159 is connected in parallel to the E_IN1 terminal, and the resistor R35 is connected to the +3.3V terminal.

5. The compact relay control module according to claim 1, characterized in that: The relay output control circuit includes an optical coupler E33, Pin 1 of the optical coupler E33 is connected to a resistor R131, and the resistor R131 is connected to a +3.3V terminal; Pin 2 of the optical coupler E33 is connected to the Output 1 terminal; Pin 3 of the optical coupler E33 is connected to the resistor R147, the capacitor C128 and the base of the transistor Q1, the emitter of the transistor Q1 is connected to the other end of the resistor R147, the other end of the capacitor C218, the diode V2 and grounded, the collector of the transistor is connected to the contact 2 of the relay K1 and the diode V2, and the diode V2 is connected to the +5.0V terminal; Pin 4 of the optical coupler E33 is connected to a resistor R139, the resistor R139 is connected to contact 1 of the relay K1 and to the +5.0V terminal, contact 3 of the relay K1 is connected to the CK1 terminal, and contact 4 of the relay K1 is connected to the COM terminal.

6. The compact relay control module according to claim 1, characterized in that: The communication component includes an Internet port communication circuit bidirectionally connected to the MCU controller, an isolated RS485 communication circuit, and an isolated CAN communication circuit.

7. The compact relay control module according to claim 6, characterized in that: The network port communication circuit includes chips U4, F4, and T1, wherein: Pins 2, 12, 17, 29, 40, 45 and 63 of the chip U4 are all connected to the +3.3V terminal, the +3.3V terminal is connected to resistors R26, R27, R28 and R29, the resistor R26 is connected to capacitor C93, the resistor R27 is connected to capacitor C103, the resistor R28 is connected to capacitor C104, the resistor R29 is connected to capacitor C106, the capacitor C93 is connected to the other end of the capacitor C103, the other end of the capacitor C104 and the other end of the capacitor C106 and grounded; Pins 6, 19, 28, 43, 54 and 64 of the chip U4 are all connected to the +1.8V terminal; Pin 1 of the chip U4 is connected to a resistor R25, and the resistor R25 is grounded; Pin 27 of the chip U4 is connected to a resistor R33, and the resistor R33 is grounded; Pin 58 of the chip U4 is connected to a resistor R24, and the resistor R24 ​​is grounded; Pin 36 of the chip U4 is connected to capacitor C108 and connected to the ETH_RSTI terminal, and the capacitor C108 is grounded; Pins 3, 9, 13, 18, 20, 37, 41, 44 and 48 of the chip U4 are all grounded; Pin 4 of the chip U4 is connected to U3_RX_P, pin 5 is connected to U3_RX_N, pin 7 is connected to U3_TX_P, pin 8 is connected to U3_TX_N, pin 25 is connected to ETH_RDY#, pin 26 is connected to ETH_RST, pin 49 is connected to ETH_INT#, pin 52 is connected to ETH_LINK#, pin 59 is connected to ETH_NSS, pin 60 is connected to ETH_SCK, pin 61 is connected to ETH_MOSI, and pin 62 is connected to ETH_MISO; Pin 1 of the chip F4 is connected to the TX_P terminal, pin 2 is connected to the TX_N terminal, pin 3 is connected to the RX_P terminal, and pin 4 is connected to the RX_N terminal; The 5th pin of the chip F4 is connected to the NET_RX_N terminal, the 6th pin is connected to the NET_RX_P terminal, the 7th pin is connected to the NET_TX_N terminal, and the 8th pin is connected to the NET_TX_P terminal; Pin 1 of the chip T1 is connected to U3_TX_P, pin 3 is connected to U3_TX_N, pin 6 is connected to U3_RX_P, pin 8 is connected to U3_RX_N, pin 9 is connected to RX_N, pin 11 is connected to RX_P, pin 14 is connected to TX_N, and pin 16 is connected to TX_P; Pins 2 and 7 of the chip T1 are connected to capacitors C109, C111, and C112 and inductor L6, the capacitors C109, C111, and C112 are grounded, and the inductor L6 is connected to the +3.3V terminal; Pin 10 of the chip T1 is connected to resistor R32, pin 15 of the chip T1 is connected to resistor R30, the resistor R30 is connected to the other end of the resistor R32 and connected to capacitor C110, the capacitor C110 is connected to resistor R31, and the resistor R31 is grounded.

8. The compact relay control module according to claim 6, characterized in that: The isolated RS485 communication circuit includes a chip U2 and an inductor L3. Pin 1 of the chip U2 is connected to the +5.0V_RS485 terminal, the +5.0V_RS485 terminal is connected to capacitors C63, C64, C67, C68 and in parallel to inductor L4, the capacitors C63, C64, C67, C68 are all grounded, and the inductor L4 is connected to the +5.0V terminal; Pins 2, 7, 8, 9, 10 and 15 of the chip U2 are all grounded; Pin 3 of the chip U2 is connected to resistor R19, the resistor R19 is connected to resistor R18 and connected to the RS485_RXD2 terminal, and the resistor R18 is grounded; Pin 4 of the chip U2 is connected to the RS485_RE2 terminal, pin 5 is connected to the RS485_DE2 terminal, and pin 6 is connected to the RS485_TXD2 terminal; Pin 12 of the chip U2 is connected to pin 2 of the inductor L3, pin 13 of the chip U2 is connected to pin 1 of the inductor L3, pin 3 of the inductor L3 is connected to diode F2, resistor R20 and RS485_2_A terminal, pin 4 of the inductor L3 is connected to diode F2, the other end of resistor R20 and RS485_2_B terminal, and the diode F2 is grounded; Pin 16 of the chip U2 is connected to the RS485_2.5V terminal, the RS485_2.5V terminal is connected to capacitors C65, C66, C69, and C70, and the capacitors C65, C66, C69, and C70 are all grounded.

9. The compact relay control module according to claim 6, characterized in that: The isolated CAN communication circuit includes a chip U1 and an inductor L1. Pin 1 of the chip U1 is connected to the +5.0V_CAN terminal, the +5.0V_CAN is connected to capacitors C54, C55, C58, C59 and inductor L2, the capacitors C54, C55, C58, C59 are all grounded, and the inductor L2 is connected to the +5.0V terminal; Pins 2, 8, 9, 10 and 15 of the chip U1 are all grounded; Pin 3 of the chip U1 is connected to the CAN1_TXD terminal; Pin 5 of the chip U1 is connected to a resistor R14, the resistor R14 is connected to a resistor R17 and connected to the CAN1_RXD terminal, and the resistor R17 is grounded; Pin 12 of the chip U1 is connected to pin 2 of the inductor L1, pin 13 of the chip U1 is connected to pin 1 of the inductor L1, pin 3 of the inductor L1 is connected to diode F1, resistor R15 and connected to the CAN1_L terminal, and pin 4 of the inductor L1 is connected to the diode F1 and the other end of the resistor R15 and connected to the CAN1_H terminal; Pin 16 of the chip U1 is connected to the CAN_2.5V terminal, the CAN_2.5V terminal is connected to capacitors C56, C57, C60, and C61, and the capacitors C56, C57, C60, and C61 are all grounded.

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