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Async RS232/422/485 (2) Extender Fiber Terminal Block to ST Multimode

Extend RS232, RS422 or RS485 protocols over multimode fiber so different types of equipment can talk to one another in point to point or multipoint industrial environments.

Item #:  Async RS232/422/485 (2) Extender Fiber Terminal Block to ST Multimode


Call 877-877-2269 for pricing and to place order.
Please Note: Once ordered, this product cannot be cancelled or returned for credit.
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*Price excludes GST

Product Features

  • Communicate signals in a point-to-point or ring topology.
  • Ideal for fiber applications that use different interface protocols.
  • Extended ambient operating range
  • Data-derived or RTS transmit/receive switching (RS-485).
  • Indicator LEDS monitor signal and power.
  • Three-way isolation, 2000-V input/output.
  • Enables any two async serial devices to communicate half- or full-duplex over two multimode ST fibers at distances up to 2.5 miles (4 km).


  • RS-232 signals are supported up to 115.2 kbps; RS422 or RS-485 signals are supported up to 460.8 kbps.
  • Fiber optic cabling makes it immune to EMI/RFI and transient surges. It's ideal for data communications near heavy electrical equipment and other electrical or radio interference!
  • Replaces converters and isolators when you connect remote equipment.
  • Modbus ASCII or RTU compatible.
  • Automatic Send Data Control eliminates the need for driver software.
  • Removable terminal blocks.
  • Conveniently mounts on an optional DIN Rail.

  • Tech Specs

    Product works with:
  • DIN Rail (DR100)
  • DIN Rail 12-VDC Power Supply (PSD100)
  • 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 1-877-877-2269.



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

    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.


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