The 4 Channel Modbus relay module is equipped with mature and stable 8-bit MCU and RS485 level communication chips. RS485 communication protocol using standard MODBUS RTU format can realize 4-way input signal detection and 4-way relay output, which can be used in digital quantity detection or power control occasions.
Device address: range 1-255, default 255, support power-down saving Baud rate, input signal, relay status, equipment address can be read using software/instructions Onboard relay switch indicator
Product information:
https: //drive. google. com/drive/folders/1ZubwgfnaL5bGpKCQ9NgqgqNK8XsPukOk? usp=sharing