USB to RS422 / RS485 Professional Serial Cable Adaptor, 1.8m - 

ICUSB422 6ft professional RS422/485 USB serial cable adapter with COM Port retention lets you connect RS422 or RS485 serial devices to your USB-enabled computer. The adapter features a 9-pin (DB9) male serial connector as well as dipswitch controls for easy port configuration and requires minimal software. The serial adapter is USB-powered, eliminating the aggravation of requiring an external power adapter. With COM port retention, assigned port settings are saved, so you can disconnect and reconnect the adapter with virtually no configuration required on the host computer. This versatile USB to serial RS232 adapter is perfect for a range of applications, from digital signage to connecting point-of-sale systems and barcode scanners. The ICUSB422 is backed by a StarTech.com 2-year warranty and free lifetime technical support.