16 Channel Relay Module DC 12V MODBUS RTU RS485 Relay Module Board PLC Controller Serial Port Switch Standby Current 11MA

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i want to use NODE-RED LATER to process the inputs from the SDM630 WATTMETER, and them deviate panels from ongrid to charging string using this relay board. Modbus device through receive from external control terminal (like Host computer/MCU ) Modbus RTU instruction to perform related operations, one frame instruction generally consists of device address, function code, register address, register data, and check code,frame length is related to function code. the 3-4th byte of the transmitted frame is represent relay address,relay1-relay8’s address separately is 0x0003,0x0008,0x000D,0x0012,0x0017,0x001C,0x0021,0x0026. Its AC plug may be changed, so please specify the type of the plug you want to use and we will send it with this AC plug. IN2-GND (default is high level, low level after the switch is turned on) The computer sends instructions to read the switch status.

Modbus device through receive from external control terminal (like Host computer/MCU )Modbus RTU instruction to perform related operations, one frame instruction generally consists of device address, function code, register address, register data, and check code,frame length is related to function code. Modbus relay module can via RS485/TTL UART interface received from host computer /MCU’s Modbus RTU command to perform related operations.

Remember to check back daily for new updates with the wide selection of relay, you're bound to find a couple of options you will like! The 5--6th byte of the transmitted frame represents the data, 0xFF00 represent turn on relay,0x0000 represent turn off relay.

The RoHS icon with this product means the PCBs, components, solder, chemicals are all lead-free and RoHS compliant. Finally, the setup has been tested successfully with QModMaster installed in my Windows 10 (x64) laptop.This is USB Relay Module with ModBus RTU protocol support and 16 relays (the type is selectable during purchase). This cheap relay module arrived with no user manual, no operating instructions, no datasheets, and no technical support. The relays are controlled via PC USB port and it is shown as virtual serial port (virtual com port).