Modbus-Rtu 2 Channels DC7V-24V Relay Module Modbus RTU Switch RS232 TTL UART

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

Modbus-RTU 1/2 Channel DC7~24V Control Switch Relay Module RS232 TTL UART

Modbus-Rtu 1 2 Channel DC7V-24V Relay Module Modbus RTU Switch RS232 TTL UART

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

Modbus-RTU 1/2 Channel DC7~24V Control Switch Relay Module RS232 TTL UART