Description
7-24V Power Supply TTL UART RS232 Relay Board Modbus RTU Single Relay Module 1 CH Single Input Modbus Relay Smart Home
Product Description
The single-channel Modbus relay module is equipped with a mature and stable 8-bit MCU and RS232 level communication chip. Using the standard MODBUS RTU format RS232 communication protocol, it can realize 1 channel of input signal detection and 1 channel of relay output, which can be used for digital detection or power control occasions.
Feature
1, Onboard mature and stable 8bit MCU and MAX3232 level conversion chip; 2, Communication protocol: support standard Modbus RTU protocol; 3, Communication interface: support RS232/TTL UART interface; 4, Communication baud rate: 4800/9600/19200, default 9600bps, support power-down save; 5, Optocoupler input signal range: DC3.3-24V (this input cannot be used for relay control); 6, Output signal: relay switch signal, support manual, flash closing, flashing off mode, the delay base of flashing off/flash off is 0.1S, The maximum flash closing/flash breaking time can be set to 0FFFF*0.1S=6553.5S; 7, Device address: range 1-255, default 255, support power-down save; 8, Baud rate, input signal, relay status, device address can be read by software/command; 9, On-board 1-way 5V, 10A/250V AC 10A/30V DC relay, can be pulled in 100,000 times continuously, with diode bleed protection, short response time; 10, Onboard relay switch indicator light; . 11, Supply voltage: DC7-24V ;
Specification
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item
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value
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Board size
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80*33mm
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Weight
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33g
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Installation Instructions
Simple instructions for use
The Modbus relay module can receive Modbus RTU commands from the host computer/MCU via the RS232/TTL UART interface to perform related operations. The following is an example of using the host computer software to open relays 1 and 2 (manual mode) through the RS232 interface. Assuming that the device address is 255 and the baud rate is 9600, the steps are as follows: 1, VCC and GND are connected to 7-24V power supply; 2. Connect the serial port to the serial port; 3. Open the host computer software "LC_ Modbus_ _RTU", select the correct port number, select 9600 for the baud rate, set the address to 255, and click "Open Serial Port"; 4. Check the "Relay 1" in the relay area to turn on the relay 1, and the indicator light of the relay 1 will be on at the same time. As pictured above: