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HP Partner

US-346 USB 4 Port RS422/485 1MBaud


  • 4 port RS422/485
  • 128 Byte Tx and 384 Byte Rx FIFOs
  • Up to 921,600 Baud
  • DB9 Connector - 9 Pin Male connector (9 Pin Male)
  • IP-30 rated enclosure
  • Drivers for all popular operating systems
  • LED status indication
  • Supplied with USB cable
  • Supplied with rubber feet for office environment


USB to Serial providing four RS422/485 serial ports. Data transfer rates up to 921,600 baud rates and the 128 byte deep transmit and 256 byte receive FIFOS, coupled with 1Mbit line drivers deliver uncompromising performance on your laptop/PC. Drivers for Windows 32 bit and 64 bit Operating Systems including Windows XP, Server 2003, Vista, Server 2008 and Windows 7. USB to serial is the quick low cost way to connect your computer to a serial comms enabled device. Boost software gives industry leading functionality and compatibility.

These products do away with traditional issues with USB technology so you can buy with confidence!

Technical Specifications


Ports 4 x RS422/485
Connector DB9 Connector - 9 Pin Male connector (9 Pin Male)
FIFO size 384 RX FIFO + 128 TX FIFO
Operating Distance RS422/485 Standard (4000 ft : 1200 metres)
Cable USB cable Type A to B (1 metre ~ 3ft)

Port Settings

Baud Rate 921,600
Data Bits 7 or 8
Parity Odd, Even, None, Mark or Space
Stop Bits 1 or 2
Tx/Rx Modes Full Duplex, Half Duplex Autogating


OS Compatibility Microsoft Windows 7 32 bit & 64 bit Editions
Windows Vista 32 bit & 64 bit Editions
Windows XP 32 bit & 64 bit Editions


Industry Approvals Microsoft Certified Gold Partner RoHS EMC: CE
Microsoft Approvals AEO C-TPAT
Microsoft Signed Drivers Windows 7 32 bit & 64 bit Editions
Windows Vista 32 bit & 64 bit editions
Windows XP 32 bit & 64 bit editions

Product Information

Power Consumption 500mA@5V
Product Weight 0.675 kg, 1.49 pounds

Packaging Information

Packaging Installation CD including manual, Microsoft signed drivers & utilities
Device USB 4 Port RS422/485 1MBaud
Optional Extras Wall Mounting kit for 4&8 ports - MK-059 Snap In DIN Clip kit for 4&8 ports - MK-070
Global Power Supply - PW-500
Packaged Weight 1.1 kg, 2.43 pounds
Packaged Dims 250(l) x 230(w) x 70(h) mm, 9.84(l) x 9.06(w) x 2.76(h) inches
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