Modbus RTU 1-channel 5V relay module switch input / output RS485 / TTL serial communication
Category：Relay module
VCC, GND: dc7-24 V power input
In, GND: dc3.3-30v optocoupler signal input
A +, B -: RS485 communication interface, a +, B - are respectively connected to a +, B of external control terminal-
Service hotline:0755-82549718
