StarTech.com 6ft RS422/485 USB Serial Adapter w/ COM Retention - Add an RS422/485 serial port to your system through USB; features COM port retention - USB to Serial - usb to rs485 - USB to DB9 - usb to rs422 - USB to serial Adapter

Being able to rename devices no matter how many are plugged in Backwards compatible with USB 1.1 Two interface modes; 4 wire RS422(TxD+/-, RxD+/-), and 2 wire RS485 (DATA+, DATA-) Integrated adapter and cable eliminates the need for additional cables Supports COM Port retention USB to Straight-Through RS422/485 Serial Adapter Supported baud rates from 300bps to 921.6 Kbps Supports RS-485 Auto Transceiver Turn Around by Unique Featured ATTA Hardware Configurable port for RS422 or RS485 support 120 OHM terminator that can be Enabled/Disabled by DIP switch