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Async RS-232 to Current Loop interface converter TB to Terminal Block

Convert async RS232 to Current Loop at speeds up to 19.2 kbps with distances up to 2000 ft over CATx cables in industrial environments with DIN Rail mounting.


67 In Stock
Same Day Shipping (before 5PM ET)
Extended Double Diamond™ Warranty Available (3 Additional Year)

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Product Features

  • Has one 20-mA transmit loop and one 20-mA receive loop.


  • Both signals feature 1000-VDC opto-isolation to protect against surges and ground loops.
  • Both loops can be set as active or passive. When set to active, an isolated 20-mA current is supplied to each loop.
  • Top speed of 19.2 kbps.

  • This DIN-rail mountable RS-232-to-Current Loop converter features 1000-VDC opto-isolation for protection against surges and ground loops.

    Tech Specs

    Approvals CE
    Connectors (2) 6-position terminal blocks
    Dimensions 0.9"H x 2.9"W x 3.9"D (2.3 x 7.4 x 9.9 cm)
    Distance 2000 ft. (609.6 m) maximum
    Indicators (2) LEDs: Data flow direction
    Isolation 1000 VDC for 1 second
    Operating Environment Temperature: -40 to 176° F (-40 to 80° C); Humidity: Up to 95% noncondensing
    Operation RS-232: Half- or full-duplex; Current Loop: 20 mA, active or passive
    Power 10-30 VDC, 100 mA
    Speed Up to 19.2 kbps
    This product works with:
    Not Available

    * 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

    Extended 1 Year Warranty Available

    Protect your purchase with an additional 1 Year Double Diamond™ warranty!
    Cost: $21.84

    Extended 3 Year Warranty Available

    Protect your purchase with an additional 3 Year Double Diamond™ warranty!
    Cost: $43.68


    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 Async RS232 to Current Loop interface converter TB to TB 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.