... RS485 signal, Port-powered, Support 2500V isolation, no power supply needed. 1, Plug and play, small volume, easy installation 2, ... point loopback RS-485 side 1200M (9600bps), RS-232 side less than 5M 600W surge protection, 15KV static protection Optoelectronic isolate: 2500V RS-232 side: DB ... 33mm*16.5mm Shell: Plastic Color: Black Weight: 50g RS-232/485 Converter(Industrial Port-Powered Isolation )