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PCI bus digital I/O board 48 port inputs or outputs

Control both outputs and inputs on industrial equipment, security devices, and more!


Limited Quantity In Stock
Typically Ships within One Week
Lifetime Double Diamond™ Warranty (Standard)

*Required field

Product Features

  • Ideal for integrating unattended status-monitoring equipment and fallback network-switching circuits.
  • Feature two 50-pin IDC connectors for industry-standard relay racks. 
  • Use for PC-based control and automation of industrial equipment, including sensors, switches, security control systems, and other automation systems.
  • Use PCI bus slots for simple input/output control.
  • Additional management software is included.
  • High-quality reed relays ensure reliability.


  • Software drivers are included for Windows® 98/Me/XP, Windows NT®, and Windows 2000.
  • Software development kit is also included—write your own applications!
  • Additional management software is included.
  • Ideal for integrating unattended status-monitoring equipment and fallback network-switching circuits.
  • Support all PCI interrupts.
  • Flexible interrupt options available.
  • Multiple adapters can reside in the same computer.
  • Feature two 50-pin IDC connectors for industry-standard relay racks.
  • Available with 32 or 48 input/outputs.
  • Cables available for simple connection to industry-standard relay racks.

    The BLACK BOX® Relay/Digital I/O Cards provide 32 or 48 channels of buffered drive digital I/O emulating 8255 mode zero.

    All channels can be configured as inputs or outputs. The 32-channel card is arranged as four ports of eight channels each. The 48-channel card is arranged as six ports of eight channels each. Each port’s mode is selectable as input or output by writing a control word to the port register.

    The low order port of the first bit can be set to generate an interrupt for status monitoring applications. You can also request conditional I/O combinations to trigger a hardware interrupt.

  • Tech Specs

    CE Approval Yes
    Channels IC903C-R2: (32) input or output; IC909C: (48) input or output
    Connectors IC903C-R2: (3) 50-pin IDC; IC909C: (1) DB37 M, (2) 50-pin IDC
    Input Range IC903C-R2: 3–12 VDC
    MTBF <150,000 hours (calculated)
    Power From the bus; Consumption: Supply line: +5 VDC; Rating: 270 mA
    Signal TTL compatible address, data, and control
    Size 3.3"H x 4.7"W (8.4 x 11.9 cm)
    Throughput (Maximum) 600 Hz
    Weight Shipping: 0.3 lb. (0.1 kg)

    * 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 digital I/O board 48 port inputs or outputs 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.