Convert RS232 into RS485 signal, Port-powered, Support 2500V isolation, no power supply needed. 1, Plug and play, small volume, ... electricity, can also worked on 3 lines 3, Support 2500V isolation, no power supply needed 4, Automatic send data control, auto ... .5mm Shell: Plastic Color: Black Weight: 50g RS-232/485 Converter(Industrial Port-Powered Isolation )