Planet Industrial 1-port RS232 422 485 Modbus Gateway with 1-Port 100BASE-FX SFP
Planet IMG-2105AT, IP30 Industrial 1-Port RS232 RS422 RS485 Modbus Gateway (1 x 100BASE-FX SFP slot, -40 75 degrees C, dual 9 48V DC, Modbus RTU ASCII, Master Slave ) Više informacija na linku