USB to RS-485 Converter (TB)

  • 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
  • Supports Windows 98, ME, 2000, XP, Vista, 7 (32/64 bit), 8 (32/64 bit)


Universal Serial Bus (USB) has become the connectivity workhorse of today’s 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 485USB9F-2W offers this solution in a space saving, USB Port powered package.

Simply install the drivers supplied on CD ROM and plug the converter into an available USB port on your computer or USB hub. The device will show up as an additional COM port in the Windows Device Manager which is fully compatible with your Windows applications. Choose the 485USB9F-2W for RS-485 2-wire applications. A one meter USB cable is included.

Part Number Description
BB-485USBTB-2W USB to RS-485 2-Wire Converter
Serial Technology
RS-485 2-Wire Data A(-), Data B(+), Ground
RS-485 4-Wire TDA(-), TDB(+), RDA(-), RDB(+), Ground
Connector Removable Terminal Block (28 to 16 AWG)
Data Rate Up to 921.6 Kbps
USB Technology
Connector USB Type B Female (High Retention)
Standard 2.0 (Backward Compatible)
Data Rate 12 Mbps
Source USB Port
Input Voltage 5 VDC
Consumption ~ 0.5 W (Low power device, draws less than 100 mA)
Driver CD Windows 98, ME, 2000, XP, Vista, 7 (32/64 bit), 8 (32/64 bit)
Dimensions 6.5 x 3.2 x 1.6 cm (2.6 x 1.3 x .6 in)
Enclosure In-line mounted, plastic
Weight 0.23 lbs (104.3 g) with USB Cable
Operating Temp 32 to 158°F (0 to 70 °C)
Storage Temp -40 to 185 °F (-40 to 85 °C)
Op Humidity 0 to 95 % (Non-condensing)
MTBF 1869313 hours
MTBF Method Parts Count Reliability Prediction
Approvals FCC, CE

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