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Relay/Digital I/O Card, PCI, 48 Inputs or Outputs  

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


LIFETIME DoubleDiamond™ Warranty (Standard)

Product Highlights

  • Rely on the relay! Count on this card for long-lasting I/O control.
  • 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.

  • Further Details

  • 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.

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

    These products work with:
  • DB37 Cable and Terminal Block (EDN37-SP)
    Questions? Contact our FREE Tech Support.

    NOTE: Technical specification weight is the unit weight. It is not the packaged shipping weight. For shipping weight, please contact Black Box customer service at 1-800-316-7107.

  • Product Data Sheets

    Double Diamond Warranty
    LIFETIME DoubleDiamond™ Warranty (Standard)

    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 Relay/Digital I/O Card, PCI, 48 Inputs or Outputs comes with a standard Lifetime warranty 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.

    Product SKU Price Quantity
    Relay/Digital I/O Card, PCI, 32 Inputs or Outputs IC903C-R2 $254.50

    Add to Cart

    Price: $271.65

    On Back Order




    Shipping Info

    Weight: 1.219 lbs.
    HxWxD: 3.75 x 10 x 13 in.

    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.

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    Black Box 1-800-316-7107 Black Box Network Services