Black Box 1-800-316-7107

Helping you is our priority at Black Box.

We're committed to providing the best customer service in the industry. We're here for you, 24/7, 365.

We'll call you

A technical expert will call you shortly.

Submit Connecting call...

Call Us

Customer Sales & Service Support

Black Box Brand Product Support

IT Services & Voice Support

Send us a FAX


Industrial Pocket Modem, RS-422/RS-485

Tiny yet tough—now available with optional self-dialing or RS-422/RS-485 capabilities!


Please call 877-877-2269 for a replacement product or part.
NONE DoubleDiamond™ Warranty (Standard)

Product Features

  • Ideal for remote monitoring in the harshest environments.
  • Handle most temperature and humidity extremes.
  • Built-in surge protection guards against brownouts and spikes.


  • Operate over standard phone lines with line speeds up to 33.6 kbps.
  • Easy to mount! Attach to a DIN rail or a flat panel.
  • Includes (1) 6-ft. DB9 male/female cable and (1) CD-ROM.

    • RS-422/RS-485 port.
    • Works in temperatures ranging from -22 to +158° F (-30 to +70° C) and in high-humidity environments up to 95% humidity (noncondensing).
    • Meets the Class I, Div. 2 (Zone 2) hazardous-location standard.
    • Supports AT commands, fax Class 1 and 2 commands, and S-registers.
    • Powered directly from any 12- or 24-VDC source—draws the same power that runs your system.
    • Auto-answer for unattended remote locations.
    • Plug-and-play and Windows® compatible.

    R> • Use to connect to multidrop or industrial devices, or any industrial I/O equipment.
    This product works with:
    • DB9 Extension Cable (with EMI/RFI Hoods) (EDN12H)
    Questions? Contact Tech Support.

  • Tech Specs

    This product works with:
    • DB9 Extension Cable (with EMI/RFI Hoods) (EDN12H)
    Questions? Contact Tech Support.

    * 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 Industrial Pocket Modem, RS-422/RS-485 comes with a standard NONE 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.