4/8 Channel ESP32 RS485 Modbus WIFI Bluetooth Relay Optocoupler Isolation Module

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Modbus RTU DC12V 8/16Channel RS485 Relay Module PLC Expaning Board DIN Rail Case

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12V 8CH Ethernet Relay Network Switch Modbus TCP RS485 Time Relay Module ET48A08

Modbus RTU DC12V RS485 Relay Module PLC Expaning Board DIN Rail Case 8/16Channel

4/8channel ESP32 RS485 Modbus WIFI Bluetooth Relay Optocoupler Isolation Module

8 Channels DC 12V RS485 / TTL Relay Module Modbus Rtu 485 Control Switch