StarTech.com 6-Feet Professional RS422/485 USB Serial Cable Adapter with COM Retention ICUSB422 (Black)

Price: $43.24 (as of 2013-07-05 - Details)

Supported baud rates from 300bps to 921.6 Kbps..

StarTech.com 6-Feet Professional RS422/485 USB Serial Cable Adapter with COM Retention ICUSB422 (Black) Feature

USB Powered - no power outlet required, and no cumbersome AC adapter to carry around

COM retention saves the assigned port settings for the device, so disconnecting/reconnecting is hassle-free

USB to Straight-Through RS422/485 Serial Adapter

Supports high speed RS-422/RS-485 communication up to 921.6kbps; 400% faster than most USB to RS-232 adapters

Supported baud rates from 300bps to 921.6 Kbps