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

1-10PCS Modbus RTU DC7-24V 4 Channel Relay Control Switch RS485/TTL UART Module

8- RS485 Ethernet Relay Module Modbus RTU Protocol Various Isolation 30A1445

8 RS232 Relay Board PC USB UART DB9 Remote Control for PLC Home Garage5643

8- RS485 Ethernet Relay Module Modbus RTU Protocol Various Isolation 30A5837

8 RS232 Relay Board PC USB UART DB9 Remote Control for PLC Home Garage1910

2X Modbus Rtu 4 Ch Relay Module Input 485 Ttl Uart Communication 4-Channel7008