RS485 Bus Remote Control Switch UART Serial ports Relay Module Modbus RTU DC 12V

8-32 DI-DO PNP to PNP RS485 Modbus Rtu Remote IO Module DC 12-24V 300MA Output

1 PCS 16ch DC12V RS-485 Modbus RTU Relay Board RS485 Bus Remote Control Switch

4 PCS Mini Dc 12V 2Ch Rs485 Relay Board Modbus Rtu Switch Module Board

1 PCS 8 Channel 12V 24V Relay Shield Module RS485 PLC IO Expanding Board

1PCS 2 Channel Serial port Relay Module DC 12V PC Computer Remote Control Switc

8-24CH 4-20MA To RS485 Current Analog Input Collector Module MODBUS RTU Board

1 PCS 8 Channel 12V 24V Relay Shield Module RS485 PLC IO Expanding Board