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

8 Digital Input Module RS485 Modbus RTU TTL IO PLC Switch Acquisition Board

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

DC 12V 8 Digital to RS485 Acquisition Switch Board Modbus RTU TTL IO PLC Module

R413E16 16ch RS485 RS232(TTL) PLC Modbus Rtu Module IO Control Switch Board

16ch Full-duplex Transparent Transmission of Digital IO RS485 Modbus RTU Module

DC 12V 24V 8ch Multifunction Delay Timer RS485 Modbus Relay Module

For Microbit Expansion Board IO BIT V2.0 Horizontal Adapter Plate Q8I45625