7-24V Modbus Rtu 1/2/4 Channel Relay Module Switch input output RS485/TTL UART

4-ch Modbus-RTU Relay Switch Module Signal input and output RS485 TTL Controller

7-24V Modbus Rtu 1/2/4/8 Channel Relay Module Switch input output RS485/TTL UART

DC7 -24V Modbus Rtu 4 Channel Relay Module Switch input output RS485/TTL UART

7-24V Modbus Rtu 1/2/4 Channels Relay Module Switch input output RS485/TTL UART

8Ch Input/Output Digital Switch Ttl Lvttl Cmos Rs485 Io Steuermodul Modbus 2580