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Async RS-232 to RS-232 Repeater - DB9 to DB9

The optical repeaters/isolators adds another 50 feet to an RS232 run while it isolates the TD, RD, RTS, and CTS channels. All four channels support speeds up to 115.2 kbps. These units work in an industrial environment with DIN Rail mounting. 


Limited Quantity In Stock
Typically Ships within One Week
Extended Double Diamond™ Warranty Available (3 Additional Year)

*Required field

Product Features

  • A heavy-duty, industrial-strength repeater
  • Doubles the allowable range of RS-232 transmissions up to 100 feet (30.4 m).
  • Rugged, IP30-rated metal case for panel mounting.
  • Tolerates temperatures ranging from -40 to +176º F (-40 to +80º C).
  • Designed to withstand both shock and vibration.
  • Boasts 2-kV triple isolation for safeguarding data and equipment.
  • Data rates up to 115.2 kbps


  • Tolerates temperatures ranging from -30 to +185º F (-40 to +85º C).
  • 2G shock and 3G vibration protection.
  • Boasts 2-kV triple isolation for safeguarding data and equipment.
  • Data rates up to 115.2 kbps.
  • Modbus® and ASCII/RTU compatible.
  • DIN rail mountable with optional adapter.

    This heavy-duty Industrial Opto-Isolated RS-232 Repeater doubles the maximum allowable distance permitted under the RS-232 specification for longer serial transmissions.

    Encased in an IP30-rated enclosure, the repeater's been put through some of the most exacting tests in the industry. The high-grade repeater meets the requirements of two standards that make it suitable for electrical substation installations—IEC 61850-3 and IEEE 1613—specifications that are more stringent than NEMA TS1/TS2 requirements for transportation applications.

    Three levels of isolation.
    The Industrial Opto-Isolated RS-232 Repeater features 2-kV triple isolation, protecting equipment as well as data from rogue currents and ground loops. It provides powerful isolation on both DTE and DCE ports, and with additional isolation on the repeater's power supply circuits, you're given a third degree of protection.

    This level of protection helps prevent stray currents from disrupting important RS-232 communications, such as those in factory, engineering, military, defense industry, or utility applications.

    By isolating voltage anomalies, you stand a much better chance of preventing a surge from shutting down an assembly line—or your entire plant.

    Simple to set up and troubleshoot.
    Its rugged, panelmount case is designed for easy integration with control panel or other industrial equipment.

    Simply connect data cables to its DB9 female connector (DCE) and its DB9 male connector (DTE). For power, it has a removable, two-position terminal block that accepts 10-48 VDC power from any external power source (not included).

    The repeater also supports loopback tests for troubleshooting. Through DCE and DTE port cable connections, you can use Hyperterminal® or a similar program to perform these tests.

  • Tech Specs

    Approvals IEC 61850-3, IEEE 1613
    CE Approval Yes
    Connectors DCE: (1) DB9 F; DTE: (1) DB9 M
    Data Rates (Maximum) 115.2 kbps
    Distance 100 ft. (30.4 m); longer distances may be possible depending on the cable's capacitance
    Enclosure IP30 rated metal, panelmount
    Indicators LEDs: (1) Power, (1) TD (transmit data) and (1) RD (receive data) on both the DCE and DTE ports
    Operating Environment Temperature: -30 to +185° F (-34 to +85° C); Humidity: 0 to 95%, noncondensing
    Power From an external power supply (not included*); Input: 10-48 VDC (56 VDC maximum) on 2-position terminal block (removable); Consumption: 0.5 W typical (2.3 W with termination)
    RoHS Yes
    Size 1.3"H x 3.7"W x 5.2"D (3.3 x 9.4 x 13.2 cm)
    Weight 0.5 lb. (0.2 kg) * See our PS1003 power supply, available separately.
    This product works with:
    This product works with: 120-VAC/12-VDC Wallmount Power Supply with Bare Leads (PS1003) DIN Rail Adapter (ICD11MNT)

    Power supply not included.

    * 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: $34.20

    Extended 3 Year Warranty Available

    Protect your purchase with an additional 3 Year Double Diamond™ warranty!
    Cost: $68.40


    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 RS232 Repeater DB9 to DB9 comes with a standard 5 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.