Tripp Lite USB to Serial Adapter Converter RS-422/RS-485 USB to DB9 2-Port

Connects Up to Two 9-Pin Serial Devices to Your Computer, Laptop or Tablet's USB-A Port This USB to serial converter turns your computer's USB port into two DB9 ports capable of connecting RS-422 and RS-485 serial devices, such as modems, handheld scanners and GPS systems. No external power source is needed. Just connect the included USB cable between the U208-002-IND and your computer, and insert the included CD into your computer's CD drive in order to launch the driver. You'll be able to configure and share data among point-of-sale equipment and other serial devices. LEDs indicate when serial data is being sent or received. Independent DIP Switches for Easy Port Configuration The U208-002-IND's serial ports can be set to automatically detect an RS-422 or RS-485 device by adjusting their DIP switch settings. The ports can also be set specifically for use in 4-wire mode. COM Retention Feature for Convenient Reassigning of COM Values to Ports This USB to RS-485 adapter with built-in FT