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Diamond Point International

B&B Ruggedized USB to Serial Converters - 2 or 4 Port Versions

Add up to four isolated RS-232, RS-422, or RS-485 ports to your PC


The USR602 and USR604 are packaged in a rugged metal housing. The serial ports are configurable for RS-232, RS-422 and RS-485 (2-Wire & 4-Wire) at speeds up to 921.6 Kbps. Modbus support enables them to be used with a wide variety of industrial devices. USB Connectivity is provided through USB 2.0 Type B High Retention Connector with 3.2 lbs.-force minimum disconnect strength. 10 to 48 VDC power is supplied through a removable three position terminal block. There is an additional threaded barrel connector if your application requires an AC power adapter such as our PS12VLB-INT-MED. USB driver software is included on CD ROM or can be downloaded from this web site. The drivers support Windows Operating Systems up to Windows 8 (32 and 64 bit). Refer to the downloads tab for the latest revision. Each unit comes with DIN Rail and panel mounting hardware, giving maximum flexibility for your installation.



InterfaceRS-232: TD, RD, RTS, CTS, DTR, DSR, DCD, GND
RS-422/485: 4-Wire TDA(-), RDA(-), TDB(+), RDB(+), GND
RS-485: 2-Wire DATA A(-), DATA B(+), GND
Isolation: 2 kV – Port to Port
Surge Protection: +/- 0.5 kV DC Ports, +/- 1 kV Signal Ports
Data Rates921.6 kbps (max)
USBUSB Technology
• USB Compatibility 1.1 and 2.0
• Speed 1.5, 12, and 480 Mbps
• Power: Green LED
• TD / RD (Each Port): Green / Amber LED
Connector(s)Serial Connector: DB9 Male
USB Connector: Type B High Retention (15 N / 3.4 lbs-force withdrawal)
Power Connector: Terminal Block or Locking Barrel Plug


ElectricalInput Voltage: 10 to 48 VDC
Power Consumption
• USR602 – 3.5 Watts Maximum
• USR604 – 4.5 Watts Maximum
MechanicalDimensions USR602: 13.8x3.5x8.8 cm (5.4x1.4x3.5 in)
Dimensions USR604: 20.3x3.5x12.0 cm (8.0x1.4x4.7in)
Enclosure: IP 30, Metal
SoftwareWindows 2000, XP (32/64 bit)
Vista (32/64 bit), 7 (32/64 bit), 8 (32/64 bit),
2003 & 2008 Server (32/64 bit)
TemperatureTemperature range (operation): -40 to +80°C
Temperature range (storage): -40 to +80°C
Humidity0 to 95% Non-condensing
WeightUSR602 = 0.38 kg, USR604 = 0.68 kg
VibrationIEC60068-2-6 10-500Hz, 4G, 3 axes
ShockIEC60068-2-27 50G peak, 11ms, 3 axes
MTBFMTBF USR602: 90,013 hours
MTBF USR604: 51,098 hours
MTBF Calc. Method: MIL 217F Parts Count Reliability
Safety/CertificationEN61000-6-1:2007 (Light Industrial)
EN61000-4-2:2008 (ESD) +/-4kV Contact, +/-8kV Air
EN61000-4-3:2006 (RI) 3V/m, 80-1000MHz; 1V/m, 1.3 to 2.7 GHz
EN61000-4-4:2004 (EFT Burst) +/-1kV signal ports
EN61000-4-6:2005 (CI) 10 VRMS, 0.15 to 80 MHz
EN61000-4-8:2001 (Magnetic) 10A/m, 50Hz & 60Hz
EMCFCC Class B, CISPR Class B (EN55022:2006)

Ordering Details

BoardUSR602 USB To Isolated RS-232/422/485 - 2 Port
USR604 USB To Isolated RS-232/422/485 - 4 Port
AccessoriesPS12VLB-INT-MED Power Supply 12Vdc, Medical Grade - Us, Eu, Uk €38.28
MDR-20-24 DIN rail mount power supply 24VDC, 1.0 A output power
Order Online B&B Rugged USB to Serial Converters - Order Online