Modbus RTU 4 Way Relay Module 4 Road Input Micro Controller RS485 Communication
11,28 €
1 X Modbus RTU 4 Way Relay Module. Relay communication: 485 communication in multi-unit network. Note: IN1-IN4 does not connect 220V. Connection Mode IN1 - GND (default is high level, low level after switching on) computer sends instructions to read switch status.
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