Item Name: Modbus RTU 4 Way Relay Module 4 Switch Volume Road Input 485 Communication Newly. Smart TV Box Android Quad Core HDMI 1080P Wifi Streaming Media Player UK
Description:
Relay communication: 485 communication in multi-unit network. Based on MBDBUS-RTU protocol, the default address is 1. Users can modify the address by themselves through instructions.
Note: IN1 - IN4 is used to read switch status through 485, not through input control relay output.
IN1-IN4 switch state needs to read the switch state every time the computer inquires, and can not send data to 485 actively.
Note: IN1-IN4 does not connect 220V.
Specification:
Size: 76mm*67mm*17.5mm/2.99*2.63*0.68''
Weight: 79g
Connection Mode:
1. IN1 - GND (default is high level, low level after switching on) computer sends instructions to read switch status.
2. IN2 - GND (default is high level, low level after switching on) computer sends instructions to read switch status.
3. IN3 - GND (default is high level, low level after switching on) computer sends instructions to read switch status.
4. IN4 - GND (default is high level, low level after switching on) computer sends instructions to read switch status.
Note:
Please allow 1-3mm differs due to manual measurement.
Due to the different display and different light, the picture may not show the actual color of the item. Thanks for your understanding.
