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Async RS-422/485 Repeater - (2) Terminal Block

The optical repeaters/isolators add 4,000 feet (1.2 km) and another 32 nodes to an RS485 data circuit in an industrial environment with DIN Rail mounting. 


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

*Required field

Product Features

  • Isolates one RS485 device from the rest of an RS485 system or one local group of RS485 equipment from another.
  • Connects point-to-point, RS422 4-wire equipment to an RS485 2-wire multidrop system.
  • Can be used as a repeater to expand an RS485 system beyond 32 nodes.
  • Operates 2-wire half-duplex or 4-wire half- or full-duplex.
  • Features 12 user-selectable data rates up to 460.8 kbps.
  • This compact device links RS422 4-wire and RS485 2-wire systems while using optical isolation to protect equipment and lines from damaging ground loops.


Use to optically isolate one piece of RS485 equipment from the rest of an RS485 system or one local group of RS485 equipment from another, or it can be used as a repeater to expand an existing RS485 system beyond the standard's 32-node limitation. Can also be used to connect equipment meant for a point-to-point RS422 4-wire interface to an RS485 2-wire multidrop system in factory automation, building automation, and process automation. They can be mounted using DIN Rail and can withstand operating temperatures of -40 to 176 degrees F (-40 to 80 C).

Tech Specs

CE Approval Yes
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)
Indicators (2) LEDs: Data flow direction
Isolation 2000 VRMS for 1 minute of optical isolation of data lines
Operating Environment Temperature: -40 to +176° F (-40 to +80° C); Humidity: Up to 95% noncondensing
Operation RS-485: 2-wire half-duplex or 4-wire full-duplex; RS-422: Full-duplex
Power 10-30 VDC, 100 mA
Speed 2400 bps to 115.2 kbps, switch-selectable; other rates available up to 460.8 kbps
Surge Suppression Bidirectional overvoltage suppressor: 6.5 V; Peak power dissipation: 600 W; Capacitance (maximum): 3000 pF
To power as many as six repeaters, order our optional DIN Rail 12-VDC Power Supply (PSD100).

These products work with:
  • DIN Rail (DR100)
  • DIN Rail 12-VDC Power Supply (PSD100) to power up to six repeaters
  • DB25 to Terminal Block Adapter (IC980)
    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.

  • Support


    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 RS422/485 Repeater, (2) Terminal Block 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.