รีเลย์ 12V 4 ช่อง สื่อสารผ่าน Modbus RTU 4-way relay module 12V 4-way switch input optocoupler isolation RS485

Relay voltage: default delivery 12V relay, power supply 12V. Optional 9V 5V power supply relay (Users can communicate with pre-sale in advance.)

Relay communication: Multi-unit network 485 communication, based on MBDBUS-RTU protocol, the default communication address ID is 1, and users can modify the address by themselves through instructions

Note: IN1 - IN4 are connected to the switch to read the switch state through 485, not to control the relay output through the input.

           The switch status of IN1-IN4 needs to be read every time the computer inquires about the switch status, and cannot actively send data to the 485.

Note: IN1-IN4 cannot be connected to 220V (some buyers will make this mistake)

The wiring is as follows:

IN1 - GND (default is high level, low level after the switch is turned on) The computer sends an instruction to read the switch state.

IN2 - GND (default is high level, low level after the switch is turned on) The computer sends an instruction to read the switch state.

IN3 - GND (default is high level, low level after the switch is turned on) The computer sends an instruction to read the switch state.

IN4 - GND (default is high level, low level after the switch is turned on) The computer sends an instruction to read the switch state.

Size: 76mm*67mm*17.5mm

Signal access terminal voltage: 3v-30v

Strong current control terminal voltage: 220