Isolated USB to RS485/422 Adapter The converter and the isolation circuitry is powered by the USB port - no external supply needed. Serial conversion performed by Silicon Labs CP2104. Serial isolation performed by Analog Devices ADM2582E. On-board jumpers allow for selection of RS485 (2 wire half duplex) or RS422 (4-wire full duplex) and line termination for either driver type. USB 2.0. USB 'mini-B' connector. Driver support for Windows 2000, Windows XP, Windows Vista, Windows 7, Mac, and Linux.