Black Box 1-800-316-7107

Helping you is our priority at Black Box.

We're committed to providing the best customer service in the industry. We're here for you, 24/7, 365.

We'll call you

A technical expert will call you shortly.

Submit Connecting call...

Call Us

Customer Sales & Service Support

Black Box Brand Product Support

IT Services & Voice Support

Send us a FAX


USB to RS-232 Opto-Isolator

Connect an RS-232 device to a USB port and gain isolation from voltage spikes and ground loops.

Price: $159.55

Extended Double Diamond™ Warranty Available (3 Additional Year)

Product Features

  • Connects an RS-232 device to a PC's USB port.
  • Provides 2000-volt RMS isolation against ground loops.
  • Protect your computer and RS-232 devices from voltage spikes and ground loops.
  • Details

    This compact opto-isolator enables you to attach an RS-232 device to a USB port and gain isolation from voltage spikes and ground loops. It doesn't require PCI or ISA slots, or IRQs. Using an optional USB Type A–Type B cable, simply plug the opto-isolator into the USB port and Windows will configure the device as an additional COM port. It’s compatible with Windows 98/98 SE/Me, Windows 2000, and Windows XP applications.

    Tech Specs

    Approvals CE
    Isolation 2000 volts RMS
    Operating Systems Supported Windows 98/98 SE/Me, Windows 2000, Windows XP
    Standard USB Revision 1.1
    Connectors (1) DB9 M, (1) USB Type B
    Indicators LEDs: (1) RD, (1) TD
    Power From the USB bus
    Dimensions 0.9"H x 3"W x 1.7"D (2.3 x 7.6 x 4.3 cm)

    To make host PC connections, order:
    • USB Version 1.1 Cable, Type A Male–Type B Male Plugs
    Questions? Contact our FREE Tech Support.

    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 877-877-2269.



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

    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.

    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.