12 DIO Ethernet/RS485 Relay Module Modbus RTU TCP/IP Network PLC Expansion Board

RS485/TCP Modbus Slave Relay Control Module Ethernet Network ET48A08 12V 8 CH

DC12V/24V 20Ch RS485 Relay Board 20DO 2DI 2AI PLC IO Expanding Module Modbus RTU

Ethernet/RS485 Relay Switch Module Modbus RTU Network Controller Expansion Board

DC12V 8/16Channel RS485 Relay Module Modbus RTU PLC Expaning Board DIN Rail Case

Modbus RTU 32-channel RS485 Interface Relay Module Isolation Protection Circuits

ERE 8 Relay Control Board with RS485 Modbus Communications

Modbus RTU DC12V RS485 Relay Module PLC Expaning Board DIN Rail Case 8/16Channel