A communication circuit and system for implementing program-controlled communication

Abstract

The utility model provides a kind of communication circuit and system for realizing program control communication, and the communication circuit comprises: communication module and power module;Power module outputs 3.3V power supply VCC3V3_ISO for the power supply of communication module;The utility model can guarantee the reliability communication problem between the equipment (control platform and main control processor) connected in the two ends of communication circuit, and provides stable power supply for communication circuit.

Description

Technical Field

[0001] This utility model relates to the field of communication technology, specifically to a communication circuit and system for realizing program-controlled communication. Background Technology

[0002] As a fieldbus that supports multi-master communication, differential signal transmission, and error detection mechanisms, the CAN bus is widely used in automotive electronics (such as engine control units) and industrial automation (such as PLC collaborative control) due to its high real-time performance and strong anti-interference capabilities. However, existing CAN bus systems also have problems in complex environments, such as communication interruptions caused by power fluctuations at bus nodes, and increased bit error rates due to differential signal attenuation when wiring exceeds 40 meters in industrial fields, which affects the reliability of control commands. Utility Model Content

[0003] This utility model aims to at least solve the technical problems existing in the prior art, and in particular, innovatively proposes a communication circuit and system for realizing program-controlled communication.

[0004] To achieve the above-mentioned objectives of this utility model, this utility model provides a communication circuit for realizing programmable communication, comprising: a communication module and a power supply module; The power module outputs a 3.3V power supply, VCC3V3_ISO, to power the communication module; The communication module includes: The signal output terminal RXD of the isolated transceiver chip U11 is connected to the first end of the data interface; The signal input terminal TXD of the isolated transceiver chip U11 is connected to the second end of the data interface; The power supply terminal VCC of the isolated transceiver chip U11 is connected to the first terminal of capacitor C102 and the 3.3V power supply VCC3V3_ISO, and the second terminal of capacitor C102 is grounded. The grounding terminal GND of the isolated transceiver chip U11 is grounded; The high-level signal terminal CANH of the isolation transceiver chip U11 is connected to the first terminal of resistor R61 and the signal B input terminal B1 of the signal surge suppression chip U12. The low-level signal terminal CANL of the isolation transceiver chip U11 is connected to the second terminal of resistor R61 and the signal A input terminal A1 of the signal surge suppression chip U12; The isolated transceiver chip U11's isolated output ground terminal CANG is connected to the ground terminal GND1 and GND2 of the signal surge suppression chip U12, the first terminal of resistor R183, and the first terminal of capacitor C90. The signal surge suppression chip U12's signal B output terminal B2 is connected to the first terminal of resistor R184 and the first terminal of the CAN bus interface; The ground terminal PE1 of the signal surge suppression chip U12 is connected to the ground terminal PE2 of the signal surge suppression chip U12, the second terminal of resistor R183, the second terminal of capacitor C90, and grounded. The signal surge suppression chip U12 connects the second terminal of the signal A output terminal A2 to the second terminal of the resistor R184 and the second terminal of the CAN bus interface.

[0005] In a preferred embodiment of this utility model, the power module includes: the positive power terminal of connector J1 is connected to the negative terminal of transient suppression diode VD4, the first terminal of capacitor C66, and the first terminal of inductor L3; The negative power supply terminal of connector J1 is connected to the positive terminal of transient suppression diode VD4, the second terminal of capacitor C66, and the second terminal of inductor L3; The third terminal of inductor L3 is connected to the first terminal of capacitor C67, the first terminal of capacitor C76, the first terminal of capacitor C68, and the ground terminal GND of DC-DC converter U10, and then grounded. The fourth terminal of inductor L3 is connected to the second terminal of capacitor C67, the second terminal of capacitor C76, the second terminal of capacitor C68, and the voltage input terminal VIN of DC-DC converter U10; The positive voltage output terminal VO+ of DC-DC converter U10 is connected to the first terminal of capacitor C71 and the first terminal of inductor L1. The negative voltage output terminal VO of DC-DC converter U10 is connected to the second terminal of capacitor C71 and the second terminal of inductor L1. The third terminal of inductor L1 is connected to the first terminal of capacitor C8 and the first terminal of capacitor C22 and grounded; The fourth terminal of inductor L1 is connected to the second terminal of capacitor C8, the second terminal of capacitor C22, the first terminal of capacitor C52, and the voltage input terminal VIN of adjustable regulator D4; The adjustable voltage regulator D4 adjustment terminal ADJ is connected to the first terminal of resistor R89 ​​and the first terminal of resistor R90; The voltage output terminal VOUT of the adjustable voltage regulator D4 is connected to the voltage output terminal TAB / VOUT of the adjustable voltage regulator D4 and the first terminal of the resistor R84. The second terminal of resistor R84 is connected to the second terminal of resistor R89 ​​and the first terminal of capacitor C53, and outputs a 3.3V power supply VCC3V3_ISO; The second terminal of resistor R90 is connected to the second terminals of capacitors C52 and C53 and grounded.

[0006] In a preferred embodiment of this utility model, the isolated transceiver chip U11 is model CTM1051AMG.

[0007] In a preferred embodiment of this utility model, the signal surge suppression chip U12 is model SP00S12.

[0008] In a preferred embodiment of this utility model, the DC-DC converter U10 is model URB2415S-6WR3.

[0009] In a preferred embodiment of this utility model, the adjustable voltage regulator D4 is model LM317EMP.

[0010] In a preferred embodiment of this utility model, it includes a communication circuit for implementing program-controlled communication, and also includes a main control processor and a control platform; The control platform is connected to the main control processor via a communication module.

[0011] In a preferred embodiment of this utility model, the main control processor is model GD32F450.

[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: ensuring reliable communication between the devices (control platform and main control processor) connected at both ends of the communication circuit, and providing a stable power supply for the communication circuit.

[0013] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0014] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the circuit connection of the communication module of this utility model.

[0015] Figure 2 This is a schematic diagram of the circuit connection of the power module of this utility model. Detailed Implementation

[0016] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0017] like Figure 1 As shown, this utility model discloses a communication circuit for realizing program-controlled communication, wherein the specific connection method of the communication module circuit connection diagram is as follows: The signal output terminal RXD of the isolated transceiver chip U11 is connected to the first end of the data interface; The signal input terminal TXD of the isolated transceiver chip U11 is connected to the second end of the data interface; The power supply terminal VCC of the isolated transceiver chip U11 is connected to the first terminal of capacitor C102 and the 3.3V power supply VCC3V3_ISO, and the second terminal of capacitor C102 is grounded. The grounding terminal GND of the isolated transceiver chip U11 is grounded; The high-level signal terminal CANH of the isolation transceiver chip U11 is connected to the first terminal of resistor R61 and the signal B input terminal B1 of the signal surge suppression chip U12. The low-level signal terminal CANL of the isolation transceiver chip U11 is connected to the second terminal of resistor R61 and the signal A input terminal A1 of the signal surge suppression chip U12; wherein, resistor R61 can be removed, that is, resistor R61 is not connected between the isolation transceiver chip U11 and the signal surge suppression chip U12; The isolated transceiver chip U11's isolated output ground terminal CANG is connected to the ground terminal GND1 and GND2 of the signal surge suppression chip U12, the first terminal of resistor R183, and the first terminal of capacitor C90. The signal surge suppression chip U12's signal B output terminal B2 is connected to the first terminal of resistor R184 and the first terminal of the CAN bus interface; The ground terminal PE1 of the signal surge suppression chip U12 is connected to the ground terminal PE2 of the signal surge suppression chip U12, the second terminal of resistor R183, the second terminal of capacitor C90, and grounded. The signal surge suppression chip U12 connects its signal A output terminal A2 to the second terminal of resistor R184 and the second terminal of the CAN bus interface. The signal surge suppression chip U12 (SP00S12) ensures safe and stable signal transmission. The isolation transceiver chip U11 (CTM1051AMG) ensures electrical isolation between external devices and the main control processor. The isolated signal communicates with the main control processor through internal paths (CAN_TXD / CAN_RXD). The 3.3V power supply VCC3V3_ISO output from the power module powers the communication module.

[0018] like Figure 2 The diagram shown illustrates the specific connection method for the power module circuit. The positive power supply terminal of connector J1 is connected to the negative terminal of transient suppression diode VD4, the first terminal of capacitor C66, and the first terminal of inductor L3; The negative power supply terminal of connector J1 is connected to the positive terminal of transient suppression diode VD4, the second terminal of capacitor C66, and the second terminal of inductor L3; The third terminal of inductor L3 is connected to the first terminal of capacitor C67, the first terminal of capacitor C76, the first terminal of capacitor C68, and the ground terminal GND of DC-DC converter U10, and then grounded. The fourth terminal of inductor L3 is connected to the second terminal of capacitor C67, the second terminal of capacitor C76, the second terminal of capacitor C68, and the voltage input terminal VIN of DC-DC converter U10; The positive voltage output terminal VO+ of DC-DC converter U10 is connected to the first terminal of capacitor C71 and the first terminal of inductor L1. The negative voltage output terminal VO of DC-DC converter U10 is connected to the second terminal of capacitor C71 and the second terminal of inductor L1. The third terminal of inductor L1 is connected to the first terminal of capacitor C8 and the first terminal of capacitor C22 and grounded; The fourth terminal of inductor L1 is connected to the second terminal of capacitor C8, the second terminal of capacitor C22, the first terminal of capacitor C52, and the voltage input terminal VIN of adjustable regulator D4; The adjustable voltage regulator D4 adjustment terminal ADJ is connected to the first terminal of resistor R89 ​​and the first terminal of resistor R90; The voltage output terminal VOUT of the adjustable voltage regulator D4 is connected to the voltage output terminal TAB / VOUT of the adjustable voltage regulator D4 and the first terminal of the resistor R84. The second terminal of resistor R84 is connected to the second terminal of resistor R89 ​​and the first terminal of capacitor C53, and outputs a 3.3V power supply VCC3V3_ISO; The second terminal of resistor R90 is connected to the second terminals of capacitors C52 and C53 and grounded.

[0019] The PWR_IN+ and PWR_IN- interfaces of connector J1 support external 24V power input. Transient voltage suppression diode VD4 (SMBJ33A) prevents surge voltage from damaging the circuit. Inductor L1 (SMCM7060-102T) effectively suppresses high-frequency noise and reduces conducted interference. The power is converted to 15V by DC-DC converter U10 (URB2415S-6WR3), and after adjustment by adjustable voltage regulator D4, the output power is 3.3V VCC3V3_ISO to power the communication module.

[0020] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A communication circuit for implementing program-controlled communication, characterized in that, include: Communication module and power module; The power module outputs a 3.3V power supply, VCC3V3_ISO, to power the communication module; The communication module includes: The signal output terminal RXD of the isolated transceiver chip U11 is connected to the first end of the data interface; The signal input terminal TXD of the isolated transceiver chip U11 is connected to the second end of the data interface; The power supply terminal VCC of the isolated transceiver chip U11 is connected to the first terminal of capacitor C102 and the 3.3V power supply VCC3V3_ISO, and the second terminal of capacitor C102 is grounded. The grounding terminal GND of the isolated transceiver chip U11 is grounded; The high-level signal terminal CANH of the isolation transceiver chip U11 is connected to the first terminal of resistor R61 and the signal B input terminal B1 of the signal surge suppression chip U12. The low-level signal terminal CANL of the isolation transceiver chip U11 is connected to the second terminal of resistor R61 and the signal A input terminal A1 of the signal surge suppression chip U12; The isolated transceiver chip U11's isolated output ground terminal CANG is connected to the ground terminal GND1 and GND2 of the signal surge suppression chip U12, the first terminal of resistor R183, and the first terminal of capacitor C90. The signal surge suppression chip U12's signal B output terminal B2 is connected to the first terminal of resistor R184 and the first terminal of the CAN bus interface; The ground terminal PE1 of the signal surge suppression chip U12 is connected to the ground terminal PE2 of the signal surge suppression chip U12, the second terminal of resistor R183, the second terminal of capacitor C90, and grounded. The signal surge suppression chip U12 connects the second terminal of the signal A output terminal A2 to the second terminal of the resistor R184 and the second terminal of the CAN bus interface.

2. The communication circuit for implementing program-controlled communication according to claim 1, characterized in that, The power module includes: The positive power supply terminal of connector J1 is connected to the negative terminal of transient suppression diode VD4, the first terminal of capacitor C66, and the first terminal of inductor L3; The negative power supply terminal of connector J1 is connected to the positive terminal of transient suppression diode VD4, the second terminal of capacitor C66, and the second terminal of inductor L3; The third terminal of inductor L3 is connected to the first terminal of capacitor C67, the first terminal of capacitor C76, the first terminal of capacitor C68, and the ground terminal GND of DC-DC converter U10, and then grounded. The fourth terminal of inductor L3 is connected to the second terminal of capacitor C67, the second terminal of capacitor C76, the second terminal of capacitor C68, and the voltage input terminal VIN of DC-DC converter U10; The positive voltage output terminal VO+ of DC-DC converter U10 is connected to the first terminal of capacitor C71 and the first terminal of inductor L1. The negative voltage output terminal VO of DC-DC converter U10 is connected to the second terminal of capacitor C71 and the second terminal of inductor L1. The third terminal of inductor L1 is connected to the first terminal of capacitor C8 and the first terminal of capacitor C22 and grounded; The fourth terminal of inductor L1 is connected to the second terminal of capacitor C8, the second terminal of capacitor C22, the first terminal of capacitor C52, and the voltage input terminal VIN of adjustable regulator D4; The adjustable voltage regulator D4 adjustment terminal ADJ is connected to the first terminal of resistor R89 ​​and the first terminal of resistor R90; The voltage output terminal VOUT of the adjustable voltage regulator D4 is connected to the voltage output terminal TAB / VOUT of the adjustable voltage regulator D4 and the first terminal of the resistor R84. The second terminal of resistor R84 is connected to the second terminal of resistor R89 ​​and the first terminal of capacitor C53, and outputs a 3.3V power supply VCC3V3_ISO; The second terminal of resistor R90 is connected to the second terminals of capacitors C52 and C53 and grounded.

3. The communication circuit for implementing program-controlled communication according to claim 1, characterized in that, The isolated transceiver chip U11 is model CTM1051AMG.

4. The communication circuit for implementing program-controlled communication according to claim 1, characterized in that, The surge suppression chip U12 is model number SP00S12.

5. The communication circuit for implementing program-controlled communication according to claim 2, characterized in that, The model number of the DC-DC converter U10 is URB2415S-6WR3.

6. The communication circuit for implementing program-controlled communication according to claim 2, characterized in that, The adjustable voltage regulator D4 is model LM317EMP.

7. A communication system for implementing program-controlled communication, characterized in that, The communication circuit for implementing program-controlled communication as described in any one of claims 1 to 6 further includes a main control processor and a control platform; The control platform is connected to the main control processor via a communication module.

8. The communication system for implementing program-controlled communication according to claim 7, characterized in that, The main control processor is model GD32F450.

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