SIIG RS-232 to 422/485 Converter (ID-SC0011-S1) Surge protection for RS-422/485 Full conversion between RS-232 and RS-422/485 Transparent to user and software No setup or configuration needed 15KV ESD protection for RS-232 RS-422 and RS-485 signal selectable No additional power supply required Powered by CTS, RTS, DTR, DTS pins