Isolated USB to RS-232 Converter

  • 2 kV Isolation
  • ESD Protection – 4 kV Contact, 8 kV Air
  • Compact In-Line Case
  • USB 2.0 Full Speed Compatible (12 Mbps)
  • RS-232 Data Rates up to 460.8 Kbps
  • USB Bus Powered


This compact, isolated USB to RS-232 converter allows you to add an RS-232 port to your USB only PC. Built to rugged specifications with two kilovolts of isolation, it will protect your PC from hazardous ground loops. The compact size makes it perfect for field service use but it is also great for instrumentation and laboratory applications. Full speed (12 Mbps) USB 2.0 support allows connectivity with modern computer technology.

The RS-232 port is a DB9 Male connector wired as a DTE with full hardware handshake support. It can handle standard RS-232 data rates up to 460.8 Kbps.

Each unit comes with 1 meter USB cable and a driver disk. Drivers support Windows platforms up to Windows 8 in 32 and 64 bit implementations.

Part Number Description
BB-USO9ML2 USB to Isolated RS-232 Converter
Serial Technology
Connector DB9 Male
Data Rate 460.8 Kbps
Isolation 2 kV
USB Technology
USB Compatibility 1.1 and 2.0 (at full speed)
Speed 12 Mbps (Full)
Connector Type B
Operating System Windows 2000, XP (32/64 bit), Vista (32/64 bit), Windows 7 (32/64 bit), 8 (32/64 bit), 2003 & 2008 Server (32/64 bit)
Source USB Bus Powered
Power Consumption Low Power Device (Less than 100 mA)
TD / RD (RS-232) Red LED
Dimensions 7.7 x 4.3 x 2.3 cm (3.0 x 1.7 x 0.9 in)
Enclosure IP 30, Plastic
Weight 6.4 oz (0.18 kg)
MTBF 247,713 hours
MTBF Calc. Methods MIL 217F Parts Count Reliability
Operating Temperature 0 to 70°C
Storage Temperature -40 to 85°C
Operating Humidity 0 to 95% Non-condensing
Approvals / Certifications
Emissions EN 55022: 2010 + AC:2011 Class B Emissions
CE EN 61000-6-1: 2007 Generic Standards for Residential, Commercial and Light Industrial Environments
EN 61000-4-2: 2009 Electro-Static Discharge (ESD)
EN 61000-4-3: 2006 +A1 +A2 +IS1 Radiated Field Immunity (RFI)
EN 61000-4-4: 2012 Electrical Fast Transients-Burst Immunity (EFT)
EN 61000-4-6: 2009 Conducted Immunity

If you have any questions or would like any further information, please send us a message.

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