DO module with communication function

Abstract

The utility model provides a DO module with a communication function. The DO module comprises a power supply part, a signal transmission interface, a relay driving part, a relay, an external control terminal, an MCU chip and an RS485 chip. According to the utility model, the relays are integrated, and a plurality of relays are integrated on one PCB. Meanwhile, a multi-path interface is directly connected with a PLCDO point through a multi-core wire; the DO module with the communication function has the advantages of multiple functions, strong practicability, high working efficiency and reduced failure rate.

Description

Technical Field

[0001] This utility model relates to the field of PLC automation control technology, specifically providing a DO module with communication function. Background Technology

[0002] The DO points of a PLC control cabinet utilize intermediate relays to isolate and enhance the capacity of the control load. Multiple distributed intermediate relays need to be configured within the PLC control cabinet. This results in complex wiring and increases the labor costs of the complete system. If the PLC and relays are not in the same cabinet, a large number of wiring harnesses will need to be connected across cabinets. Utility Model Content

[0003] The technical objective of this utility model is to address the aforementioned problems by providing a DO module with communication functionality.

[0004] A DO module with communication function includes a power supply section, a signal transmission interface, a relay drive section, a relay, external control terminals, an MCU chip, and an RS485 chip, wherein:

[0005] The power supply section provides operating power to the RS485 communication section and the MCU chip;

[0006] Signal transmission interface, used to connect the output points of the PLC and DO module;

[0007] The MCU chip uses high and low level outputs to control the operation of the relay drive section;

[0008] The relay drive section outputs DC24V based on the high-level signal, controls the relay contacts to conduct, and outputs to the external control terminal to control the AC contacts, motors, and other electric components of external devices.

[0009] The RS485 chip uses a PLC or PC as the master station to communicate with the DO module to control the relay.

[0010] Furthermore, the signal transmission interface adopts a 9-pin D-type D-DMR009PM-D002 serial port module, uses a 10-core wire to connect the PLC and DO modules, and provides DC24V power to the PLC and DO modules, with a common line to the S / S.

[0011] The voltage signals emitted by the PLC and DO modules are transmitted to the relay drive section through the D-DMR009PM-D002 serial port module.

[0012] Furthermore, the relay drive section includes an amplifying transistor S8050 J3Y and an LED indicator.

[0013] When the PLC or PC sends a high-level signal, the base of the transistor S8050 J3Y operates at saturation voltage, and the collector and emitter of the transistor S8050 J3Y are in a conducting state, thereby driving the relay coil to be energized and the relay contacts to open.

[0014] Furthermore, the relay includes 8 or 16 sets of relays, with an operating voltage of DC24V.

[0015] Furthermore, the MCU chip used is the GD32F103C8T6 chip.

[0016] Furthermore, the RS485 communication section uses the RS-485MAX485ESA chip, which conforms to the general standard MODBUS communication protocol, and serves as a MODBUS slave station for connecting the PLC serial port and the PC host computer serial port.

[0017] Furthermore, the PLC serial port and the PC host computer serial port communicate with this module in master station mode to control the relay.

[0018] Furthermore, the power supply section uses the LM2575S-5.0 chip and the AMS1117-3.3 chip, powered by DC 24V, wherein:

[0019] The LM2575S-5.0 chip is responsible for transmitting DC24V power to DC5V to provide operating power for the RS485 chip;

[0020] The AMS1117-3.3 chip is responsible for converting DC5V power to DC3.3V to provide operating power for the MCU chip.

[0021] Compared with the prior art, the DO module with communication function of this utility model has the following outstanding advantages:

[0022] This invention integrates relays, with multiple relays integrated onto a single PCB board. It also uses multiple interfaces to directly connect to the PLC_DO point via multi-core cables.

[0023] The described DO module features RS485 communication capability, allowing it to function as a Modbus slave station for a PLC. Only a two-core communication cable is required between the PLC_DO point and the module, enabling PLC control of relays and thus external devices. Furthermore, this DO module allows a PC to act as a master station, communicating with it via RS485 to control relays. This DO module with communication functionality offers multiple features, strong practicality, high efficiency, and a reduced failure rate. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the architecture of the DO module of this utility model. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0026] like Figure 1 As shown, a DO module with communication function comprises seven parts: a power supply section, a signal transmission interface, a relay drive section, a relay, external control terminals, an MCU chip, and an RS485 communication section. Among them:

[0027] 1. Power supply section: DC24V power supply, using LM2575S-5.0 chip and AMS1117-3.3 chip;

[0028] The LM2575S-5.0 chip converts the DC24V power supply to DC5V to provide operating power for the RS485 chip.

[0029] The AMS1117-3.3 converts the DC5V power supply to DC3.3V to provide operating power to the MCU chip.

[0030] 2. Signal transmission interface

[0031] The signal transmission interface is used to connect the PLC_DO output point to the interface of this module, and uses a 9-pin D-type D-DMR009PM-D002 chip;

[0032] The interface is connected to PLC_DO with a 10-core wire and provides DC24V power to the PLC module, which is a common line with S / S (common terminal of input signals).

[0033] The PLC sends a voltage signal to the relay driver section via this serial port.

[0034] 3. Relay drive section

[0035] Includes the S8050 J3Y amplifier transistor chip and LED indicator;

[0036] When the PLC sends a high-level signal, the transistor operates in saturation, and the collector and emitter of the transistor are in a conducting state, thereby driving the relay coil, which in turn energizes the relay coil and closes the relay contacts.

[0037] 4. Relay section

[0038] Includes 8 or 16 sets of relays;

[0039] Operating voltage DC24V; when the voltage supplied by the transistor in the drive circuit reaches DC24V, the relay is energized and outputs to the external control terminal.

[0040] 5. External control terminals

[0041] Used to control external electrical equipment such as AC contactors and frequency converters.

[0042] 6. MCU chip

[0043] The GD32F103C8T6 chip is used to control the relay drive section by utilizing high and low level outputs.

[0044] When the base of the transistor reaches the saturation voltage, the collector and emitter of the transistor are in a conducting state, thereby driving the relay coil, which in turn energizes the relay coil and closes the relay contacts.

[0045] 7. RS485 Communication Section

[0046] It uses the RS-485MAX485ESA chip, which conforms to the general standard MODBUS communication protocol; as a MODBUS slave, it is used to connect the PLC serial port and the PC host computer serial port.

[0047] The PLC serial port and the PC host computer serial port communicate with the DO module in master station mode to control the relay.

[0048] 8. The DO module has two operating modes, wherein:

[0049] One method involves connecting to the PLC_DO point via a signal transmission port, suitable for using a PLC and this relay module within the same control cabinet.

[0050] One method involves connecting the PLC via RS485 communication and the host computer via serial port. This is suitable for situations where the PLC and this module are not in the same control cabinet, and is also suitable for direct control of this module by a PC host computer.

[0051] The embodiments described above are merely preferred embodiments of this utility model. Ordinary variations and substitutions made by those skilled in the art within the scope of this utility model's technical solution should be included within the protection scope of this utility model.

Claims

1. A DO module with communication function, characterized in that, The DO module comprises a power supply part, a signal transmission interface, a relay driving part, a relay, an external control terminal, an MCU chip and an RS485 chip, wherein: The power supply part is used to provide working power supply for the RS485 communication part and the MCU chip; The signal transmission interface is used to connect the PLC and the DO module output point; The MCU chip is used to control the relay driving part to work by using high and low level output; The relay driving part outputs DC 24V according to the high level signal output, controls the relay contact to be conductive, and outputs to the external control terminal to control the external equipment; The RS485 chip uses the PLC or PC host computer as the master station to communicate with the DO module to control the relay.

2. The DO module with communication function according to claim 1, characterized in that, The signal transmission interface adopts a 9-pin D-type D-DMR009PM-D002 serial port module, uses 10-core wires to connect the PLC and the DO module, and provides DC 24V power supply for the PLC and the DO module, and is connected with the S / S common line; The voltage signals output by the PLC and the DO module are transmitted to the relay driving part through the D-DMR009PM-D002 serial port module.

3. The DO module with communication function according to claim 1, characterized in that, The relay driving part comprises an amplifying triode S8050 J3Y and an LED indicator lamp; When the PLC or PC outputs a high level signal, the base of the triode S8050 J3Y works in a saturated state voltage, and the collector and the emitter of the triode S8050 J3Y are in a conductive state, so as to drive the relay coil to be electrified and attracted, and the relay contact is conductive.

4. The DO module with communication function according to claim 1, characterized in that, The relay comprises 8 groups or 16 groups of relays, and the working voltage is DC 24V.

5. The DO module with communication function according to claim 1, wherein, The MCU chip adopts a GD32F103C8T6 chip.

6. The DO module with communication function according to claim 5, characterized in that, The RS485 communication part adopts an RS-485 MAX485 ESA chip, conforms to the general standard MODBUS communication protocol, is used as a MODBUS slave station, and is used to connect the PLC serial port and the PC host computer serial port.

7. The DO module with communication function according to claim 6, characterized in that, The PLC serial port and the PC host computer serial port communicate with the module in a master station mode to control the relay.

8. The DO module with communication function according to claim 1, wherein, The power supply part adopts an LM2575S-5.0 chip and an AMS1117-3.3 chip, and is powered by DC 24V, wherein: The LM2575S-5.0 chip is responsible for converting the DC 24V power supply into DC 5V output, and is used to provide working power supply for the RS485 chip; The AMS1117-3.3 chip is responsible for converting the DC 5V power supply into DC 3.3V output, and is used to provide working power supply for the MCU chip.

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