Universal Serial bus (USB) has become the connectivity workhorse of todays PCs, replacing the familiar serial ports. However, many commercial and industrial devices still use the RS-485 interface. To connect these devices to modern PCs, you need a simple and reliable conversion solution. The 485USBTB-2W and 485usbtb-4w data transfer adapters offer this solution in a space saving, USB port powered package. Simply plug the converter into an available USB port on your computer or USB hub and install the drivers supplied on CD ROM. The device will show up as an additional COM port in the windows device Manager which is fully compatible with your Windows applications. Features: connect RS-485 devices to your USB port perfect for field service applications small “ fits easily into any laptop bag USB port powered USB 2.0 (12 Mbps) compatible RS-485 data rates up to 921.6 Kbps removable terminal block for easy wiring high retention USB connector.