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RS-422/485 Serial PCI Boards
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US Prices
CDN Prices

Privacy and Security




  • 2 or 4 independent serial ports
  • Each port configurable as RS-422 or RS-485
  • Speeds up to 921.6 kbps
  • Full duplex and half duplex modes supported
  • 16750 UARTs with 64-byte FIFOs
  • Surge suppression package available
  • Windows 95/98/Me/NT/2000/XP & Linux support
  • 5 year warranty


Quatech's RS-422/485 serial boards are available with either two or four ports. The ports are jumper configurable for either RS-422 or RS-485 in any combination for full and half duplex networks. PCI registers are properly implemented to assure that Plug-and-Play works reliably, and that the board will not cause PCI bus conflicts. The boards are implemented with 16750 UARTs containing 64-byte FIFOs. They use a clock multiplying feature allowing them to achieve data rates as high as 921.6 kbps.

To maintain maximum signal integrity, Quatech uses a four-layer board design. But, for even more protection in industrial environments, an optional surge suppression package is available. This "IND" option applies a surge suppressor to each line that is capable of sustaining up to 40A peak, 8 x 20µs transient surges, a clamping voltage of 15.5V and a peak energy dissipation of 0.1 Joules. (Note that implementing the IND option restricts the board's speed to 115.2 kbps.)


USA Office

Address: 1480 Gulf Road, Suite 837,
PO Box 1280
Point Roberts, WA 98281

Western Canada - Vancouver BC

Tel:1.800.663.6001 or 1.604.925.6150
Address: 2454 Haywood Ave
West Vancouver, BC V7V 1Y1

Eastern Canada - Markham, Ontario

Tel:1.800.465.0164 or 1.905.513.7027