4 Channel RS485 Relay Module Modbus RTU AT Command Remote Control Switch for PLC PTZ Smart Home Security DC 12V
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Estimated Delivery: Between
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2. MODBUS command mode (A5 = ON), you can control a variety of ways: Serial Hyper Terminal Control (need to manually add the CRC), Modbus Poll software control (software automatically add the CRC), PLC or MCU process control
3. DC 1-100V OR AC 85-265V control circuit,Wiring diagram below(Note:If not DC 12V load, need another DC 12V power supply). "LOAD" may be Machine tool ,CNC,3D Printer,LED lights, fans, motors and other DC AC equipment
1 x 4 Channel DC 12V RS485 Relay Module
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