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

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

2CH RS485 Digital Temperature Collector DS18B20 Sensor Modbus Analog Input IO

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

8 16 24 32 48CH Multifunction RS485 Remote IO Module PLC DI-DO expansion Board

32CH RS485 2.54mm Pin Rtu Input and Output Control PLC HMI Remote IO Expanding

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

DC 12V 433M Wireless RS485 IO Point-to-Point Master-Slave RF Transceiver