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Wireless Serial Data Extender - 2.4-GHz, 100-mW, 250- kbps RF, 1 mile (1.6 km)

Extend RS-232, RS-422, and RS-485 signals up to 3 miles in harsh areas.


Please call 877-877-2269 for a replacement product or part.
Extended Double Diamond™ Warranty Available (3 Additional Year)

Product Features

  • These easy-to-install radio modems offer serial signal extension in electronically "noisy" areas.
  • Mount on a DIN rail for space-saving, industrial use.
  • RoHS compliant.


  • Rugged IP30-rated cases protect internal circuitry, enabling their use outdoors and in temperature extremes.
  • Fit easily into most industrial power control systems, and work with Modbus® and PROFIBUS® systems—no converters are needed!
  • Offer constant signal strength for simple installation and troubleshooting links.

  • Built for long-lasting use, Black Box® 2.4-GHz Wireless Serial Data Extenders give you reliable communications in interference-heavy environments.

    All three modems use an integrated omnidirectional dipole whip antenna for radio communications. Plus, they're industrial grade with an IP30-rated enclosure that protects internal circuitry from the heat common to factory operations. They transmit critical data to programmable logical controllers (PLCs), instrumentation with touch screens, and other serial devices on or near the factory floor or at remote sites.

    Just choose the power level for the distance and RF speed you require for your application. Because they boast strong receiver sensitivity, the serial extenders can send full-duplex data at greater distances and through demanding environments. Advanced filtering technology keeps cell phone and other wireless signals from disrupting your communications.

    And because the compact 2.4-GHz Wireless Serial Data Extenders mount easily on a standard DIN rail, they enable you to save cabinet, rack, and shelf space in your installation. To power a mounted modem, just order the optional DIN Rail-Mount Power Supply (PDS200).

    Setup is straightforward. Software shipped with the extender installs in your Windows® 98/Me, Windows 2000, or Windows XP® PC for configuring your COM port for baud rate and other settings.

    You can, for instance, configure the extenders' output to provide RS-232 flow control. The software also supports AT commands, terminal emulation, a RSSI signal range test, and modem emulation.

    DIP switches enable you to flip between 2-wire RS-485 or 4-wire RS-422/RS-485 operation (RS-232 is always present via its DB9 port). A front-panel indicator informs you of signal strength.

    Want to set up wireless links at even longer distances? Then see our 900-MHz Wireless Serial Data Extenders (in the "Related Products").

    Tech Specs

    Antenna 2.1-dBi RPSMA male dipole
    CE Approval Yes
    Connectors RS-232: (1) DB9 F (DCE); RS-232/RS-422/RS-485: (1) terminal block; Power: (1) terminal block
    Data Rate RF: MDR3241A: 9.6 kbps; MDR3242A: 19.2 kbps; MDR3243A: 250 kbps; Serial: All: 1.2, 2.4, 4.8, 9.6, 19.2, 38.4, and 57.6 kbps; MDR3243A also supports 115.2 kbps
    DIN Rail Mount 35 mm
    Distance (Maximum) MDR3241A-MDR3242A: Indoor: 600 ft. (182.8 m), Outdoor: 3 mi. (4.8 km); MDR3243A: Indoor: 300 ft. (91.4 m), Outdoor: 1 mi. (1.6 km)
    Frequency 2.400 GHz-2.4385-GHz ISM band
    Indicators LEDs: (1) Power, (1) RSSI (signal strength), (1) Wireless Data
    Modulation Frequency shift keying
    Operating Environment Temperature: 40 to 185° F (4 to 85° C); Humidity: 10 to 90% noncondensing
    Power Input: 10-48 VDC/18-30 VAC (not included)
    Size 4.7"H x 1.2"W x 3.3"D (11.9 x 3 x 8.4 cm)
    Standards MDR3243A: IEEE 802.15.4; All others use a proprietary radio

    NOTE: Must be used in pairs. Order an extender for both local and remote side connections.

    These products work with:
  • DIN Rail 12-VDC Power Supply (PSD100)
  • DIN Rail (DR100)
  • Base Modules for 2.4-GHz Wireless Extenders for Digital or Analog I/O (MDR4241A–MDR4244A)
    Questions? Contact our FREE 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.

  • Warranty

    Double Diamond Warranty

    Extended 1 Year Warranty Available

    Protect your purchase with an additional 1 Year Double Diamond™ warranty!
    Cost: $20.60

    Extended 3 Year Warranty Available

    Protect your purchase with an additional 3 Year Double Diamond™ warranty!
    Cost: $41.19


    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 Wireless Serial Data Extender - 2.4-GHz, 100-mW, 250- kbps RF, 1 mile (1.6 km) comes with a standard 1 Year 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.