StarTech.com USB Adaptor Cables - StarTech.com ICUSB422, The StarTech.com ICUSB422 6ft Professional RS422/485 USB Serial Cable Adaptor with COM Port Retention lets you connect RS422 or RS485 serial devices to your USB-enabled computer. The adaptor features a 9-pin (DB9) male serial connector as well as dipswitch controls for easy port configuration, and requires minimal software.The serial adaptor is USB-powered, eliminating the aggravation of requiring an external power adaptor. With COM port retention, assigned port settings are saved, so you can disconnect and reconnect the adaptor with virtually no configuration required on the host computer.The ICUSB422 is backed by a 2-year warranty and free lifetime technical support. StarTech.com ICUSB422 USB To RS422/485 Adapter Cable