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


RS232/422 Data Monitor Advantage

Debug serial interfaces easily and economically with this handheld test set.


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

*Required field

Product Features

  • Works on RS-232, RS-423, RS-422, and RS-485 interfaces.
  • Quickly captures serial data and isolates faults.
  • Stores up to 304,000 records in 1 MB nonvolatile RAM for transmit and received data.


  • Line speeds up to 230.4 kbps async (half-duplex) or 64 kbps sync.
  • Use the included SAM–232 Compact breakout box to monitor voltage and run ground potential and ground loop tests.

  • What's included:
    • (1) test set with keyboard and LCD screen
    • (1) SAM 232–Compact breakout box
    • (3) adapters: (1) low-profile DB9 male to DB25 female, (1) low-profile DB9 female to male, (1) plastic molded DB9 female to DB25 male
    • (1) 3-ft. (0.9-m) ribbon-style monitor cable with a male and female DB25 at each end
    • (1) set of jumper wires: (2) 4-pin and (6) 2-pin
    • (1) 9-V connector for SAM 232–Compact
    • (1) 115-VAC, 60-Hz power adapter for test set
    • (2) batteries: (1) 9-V, (1) 3-V lithium
    • Zippered, two-compartment carrying case
    • (1) user's manual
    • Quick-start release notes

    Tech Specs

    Test Set with Keyboard and LCD Screen
    Connectors (1) DB9 F, (1) DB25 M, (1) DB25 F
    Data Display Codes ASCII, EBCDIC, Baudot, IPARS
    Dimensions 5.6"H x 9.25"W x 1.4"D (14.2 x 23.5 x 3.6 cm)
    Interface RS-232, RS-422, RS-423, RS-485 (menu-selectable)
    Keyboard Display 8 rows of 30/40 characters with super twist LCD screen
    Keyboard Layout Full 64-key QWERTY; PC-style directional keypad
    Line Speed (Asynchronous) 75 bps–115.2 kbps (full-duplex) or 230.4 kbps (half-duplex); Synchronous: 75–64 kbps
    Line Speed (Synchronous) 75–64 kbps
    Parity Odd, even, none, ignore
    Power 9-V battery or external 115-VAC, 60-Hz adapter (230-VAC, 50-Hz version on request)
    Protocols Asynchronous, bisynchronous, isochronous, SDLC/HDSL
    Voltage 5 or 9 V (menu-selectable)
    Weight 1.4 lb. (0.6 kg)
    SAM?232 Compact Breakout Box
    Breakout Switches 25
    CE Yes
    Connectors (1) DB25 M, (1) DB25 F
    Dimensions 0.8"H x 4"W x 3.4"D (2 x 10.2 x 8.6 cm)
    Indicators Dual-state LEDs: 102
    Jumpers (6) single 1-to-1, (2) 4-way
    Leads Monitored All 25
    Patching Voltage Source +V, -V
    Power Nonpowered, or use 9-V battery for voltage

    * 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: $349.60

    Extended 3 Year Warranty Available

    Protect your purchase with an additional 3 Year Double Diamond™ warranty!
    Cost: $699.19


    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 RS232/422 Data Monitor Advantage 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.