Add an rs422485 serial port to your system through usb features com port retention the icusb422 6 ft professional rs422485 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 rs422rs485 usb adapter is fully powered via the host usb connection and provides power to th