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PCI bus serial board two port RS-232/422/485 two DB9

Provides two field selectable RS-232/422/485 serial ports when the card is installed in an open PCI slot in your computer.


Please call 877-877-2269 for a replacement product or part.
Lifetime Double Diamond™ Warranty (Standard)

Product Features

  • Each port can be configured independently for RS-232, RS-422, or RS-485.
  • Configure ports as RS-232 for standard serial COM ports
  • Configure ports as RS422 for long distance device connections
  • Configure ports a RS485 and capture data from multiple peripherals
  • In RS485 mode up to 31 devices can be attached to each port
  • Card has a 16850 UART providing speeds up to 460.8 kbps


  • Compatible with all Windows®, Linux, and QNX operating systems.
  • Each port can be configured independently for RS-232, RS-422, or RS-485.
  • RS-422/485 supports cable distances up to 4000 feet (1219.2 m).
  • Thwarts ground loops.

  • This product works with:
    • DB25 Serial Null-Modem Cable (BC05000)
    • Serial AT Adapters (FA520A-R5)
    • Parallel PC Adapters (FA601)
    Questions? Contact our FREE Tech Support.

    Tech Specs

    CE Approval Yes
    Connectors (2) DB9 M
    Distance (Maximum) RS-232: 50 ft. (15.2 m); RS-422, RS-485, RS-530: 4000 ft. (1219.2 m)
    Protocol Asynchronous
    Speed 460.8 kbps (sustained)
    This product works with:

    * Technical specification weight is the unit weight. It is not the packaged shipping weight. For shipping weight, please contact Black Box customer service at 877-877-2269.




    Double Diamond Warranty Diamond

    Double Diamond™ Warranty (Standard)

    Take the risk out of equipment purchases with the Double Diamond™ Warranty from Black Box Network Services.

    The Double Diamond Warranty is our warranty that protects your Black Box® brand products* from accidental damage, including drops, water, and power surges.

    The PCI bus serial board two port RS232/422/485 two DB9 comes with a standard Lifetime Double Diamond™ Warranty (Standard) already included.

    During the warranty period, Black Box Network Services will repair or replace your damaged equipment within one week of receipt at NO CHARGE!*

    Plus, get an Extended Double Diamond Warranty.

    You can also extend your warranty or protect a previously purchased Black Box® brand product** for an additional year—for only 10% of the purchase price! Or, extend your coverage for a full three years for only 20% of the purchase price!

    Ordering an extended warranty is easy: When viewing a product in your shopping cart, just select the one or three years of additional coverage in the dropdown menu under “Warranty Options.” For details, contact Customer Service at 724-746-5500.

    * Warranty subject to certain exclusions and limitations ** Certain products may not be eligible.

    What’s more, we also have a 45-day return policy. Simply call Customer Service for a Return Authorization (RA) number, return your product in new condition and in the original package, and receive a full refund.