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Universal Async Fiber Optic Extender  

Extend serial communications up to 4 kilometers—or more—through noisy areas.


Extended Double Diamond™ Warranty Available (3 Additional Year)

Product Highlights

  • Take advantage of the inherent EMI/RFI resistance, as well as the security, offered by fiber. Also, eliminate ground loops!
  • Gives you the flexibility to link RS-232, RS-422, or RS-485 async serial devices over multimode fiber optic cabling.

  • Further Details

  • Use this compact device to extend your RS-232, RS-422, or RS-485 communications over a secure fiber optic link!
  • Use point-to-point or in a multidrop fiber ring configuration in which multiple serial devices communicate with another.
  • Supports full- or half-duplex communications over two fibers at distances up to 4 kilometers (2.5 mi.).
  • To extend a link farther, add the Fiber Optic Repeater (ME611A-US).
  • Also converts RS-232 to RS-422/RS-485.
  • Can be used with most multimode fiber.
  • The LED emitter and photodetector operate in the 820-nm fiber wavelength.
  • Set mode of operation for RS-422 or RS-485 with DIP switches.

  • Approvals CE
    Fiber Cable Dual multimode optical cable
    Fiber Optic Wavelength 820 nm
    Fiber Ring Length 8 km (5 mi.) maximum
    Operation Asynchronous, point-to-point, half- or full-duplex, or multipoint (fiber ring) half-duplex
    Speed RS-232: 115.2 kbps maximum;
    RS-422/RS-485: 500 bps maximum
    Interface RS-232, RS-422, RS-485
    Connectors Serial: (1) DB25 F;
    Fiber optic: (1) pair of ST®
    Power From the included 12-VDC power supply
    Dimensions 4.3"H x 2.3"W x 1"D (10.9 x 5.8 x 2.5 cm)

    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.

    Double Diamond Warranty
    Extended Double Diamond™ Warranty Available (3 Additional Year)

    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 Universal Async Fiber Optic Extender comes with a standard 5 Year 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.


    Add to Cart

    Price: $220.15

    Quantity Available: 1




    Shipping Info

    In Stock - orders received before 5PM ET ship same day

    Weight: 1.125 lbs.
    HxWxD: 0.01 x 0.01 x 0.01 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