SIIG's 1-Port USB to RS-422/485 Serial Adapter instantly adds one industrial RS-422/485 port to your USB enabled desktop or notebook computer. It allows users to connect any RS-422 or RS-485 serial device via the DB9 port and to conveniently switch between RS-422 and RS-485 devices with the auto detect and switch technology without powering down the system. This USB to RS-422/485 Serial Adapter is wall-mounted ready and USB bus-powered with no external power adapter required for easy integration into harsh industrial environments.