CE040 DC 12V 4 Channel RS485 Relay Module Modbus RTU & AT Command Remote Control

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

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

4/8/16CH Digital Analog Ethernet Remote I/O Modules Modbus Network Controller

4DI-4DO RS485 Relay Module Modbus RTU Remote IO Expansion Board DC 12V 24V

24CH RS485 Remote Control Switch Multifunction PLC IO Expansion Board Modbus

4/8/16 DI-DO CAN Relay Controller Module RS485 Digital NPN/PNP IO Expanding Boar

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