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


Pro Switching Gang switch 18 card chassis 2U no cards installed

The 2U Gang Switch System gives incredible operational flexibility and performance, switch one card, the entire gang switch or an entire daisy chained system using RS232 or Ethernet.


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

*Required field

Product Features

  • Save space in your rack.
  • Mix and match hot-swappable RS-232, RS-530, video, fiber, CAT5e, and CAT6 A/B switching modules in a single chassis.
  • Chassis holds up to 18 modules. Cascade multiple chassis and racks.
  • Offers secure switching via latching relays.
  • Choose a single power supply or dual-redundant power cards.
  • Control switching locally or remotely.


The Pro Switching System 2U is an intelligent ganged switching system consisting of an ultra-compact 2U 18-slot chassis and a selection of A/B switching, controller, and power supply cards.

Controller Cards take up only one slot, and Power Cards take up one slot or two slots for redundancy, leaving you with 13–15 slots for A/B Switch Cards. All occupy one slot, except for the DB25 Cards, which require three slots.

Local and remote control.
The advanced design of this system gives incredible operational flexibility and performance. Switch one card individually or switch the entire chassis through a Controller Card. You'll need one Controller Card per rack chassis. If you plan to daisychain multiple chassis, the Controller Card in the first chassis controls the entire system.

You can choose an RS-232 Only Controller Card, which enables you to gang switch via the manual toggle switch or with serial commands, as well as an RS-232/Ethernet (SNMP) Controller Card, which enables you to switch the chassis from anywhere via an RS-232 or IP connection.

If you want to extend RS-232/IP control to a second daisychained Pro Switching System chassis, order the SNMP Expansion Controller Card. This enables you to send hardware control signals and control the daisychained system with RS-232 messages through the RS-232/Ethernet (SNMP) Controller Card.

Pick a card, any card.
A/B Switch Cards are available for RS-232, video, fiber optic, and CAT5e/CAT6 connections.Use the system for both new and legacy applications. You can add cards for fast CAT6 10-Gb E networking while keeping connections for older RS-232 and 75-ohm video connections.

Secure and fallback switching.
For fail-safe operation, all the cards (except those noted) use proprietary latching or micro-mirror relay switching technology—which means data can continue to pass through even if the power has been cut off. Because the cards perform Layer 1 switching, the system operates independently of data rates, protocols, formats, or signal levels.

The non-latching fiber cards fall back to a Port C (chassis) to Port A connection when the power fails. When power is restored, the non-latching switch card reconnects Port C to the originally selected port (A or B). These types of cards are typical when you want a fallback or failover connection during power outages.

Each chassis also has a keyed switch so you can enable/disable manual switching from the front-panel toggle switches.

Control power.
To power your chassis, order one or two external power supplies and the power adapter card. For backup power, add a Redundant Power Supply Card.

Ordering instructions

First, order the chassis...
Pro Switching System, 2U, 18-Card (SM260A)

Next order at least one power supply (order two for redundant power)...
Power Supply, 120–240 VAC, External (SM961A-PS)

Next order a card to adapt power input...
Power Supply Cards:
AC External Adapter Card (SM261A-CARD)
Redundant Power Supply Cards (NOTE: Each card requires two chassis slots.):
100–240-VAC Input (SM261A-VAC)
-48-VDC Input (SM261A-VDC)

...then select a Controller Card...
RS-232/Ethernet (SNMP) (SM262A)
RS-232 Only (SM263A)
SNMP Expansion (SM264A) choose your A/B Switch Cards...
DB25/RS-232 (SM265A)
DB25/RS-530 (SM266A)
Video F-Connector, Latching (SM276A-LCH)
Video F-Connector, Non-Latching (SM267A)
Multimode Fiber Optic:
ST®, Latching (SM277A-MM-ST-LCH)
SC, Latching (SM277A-MM-SC-LCH)
ST, Non-Latching (SM277A-ST)
SC, Non-Latching (SM277A-SC)
Single-Mode Fiber Optic:
ST, Latching (SM278A-SS-ST-LCH)
SC, Latching (SM278A-SS-SC-LCH)
ST, Non-Latching (SM278A-ST)
SC, Non-Latching (SM278A-SC)
RJ-45 Copper:
RJ-45 CAT5 (SM268A)
RJ-45 CAT6 (SM269A)

For empty slots, order...
Blank Panel, Front or Rear, 2U (SM279A-BLNK)

Questions? Contact our FREE Tech Support.

This product works with:
  • Power Supply (SM961A-PS)
  • Power Supply Card (SM261A-CARD)
  • Redundant Power Supply Cards (SM261A-VAC, SM261A-VDC)
  • A/B Switch Cards (SM265A, etc.)
  • Blank Panel (SM279A-BLNK)
  • Questions? Contact our FREE Tech Support.

    Tech Specs

    CE Approval Yes
    Dimensions 3.5"H (2U) x 19"W x 12.5"D (8.9 x 48.3 x 31.8 cm)
    RoHS Yes
    Weight Empty: 2.5 lb. (1.1 kg)
    This product works with:
    This product works with:
  • Power Supply (SM961A-PS)
  • Power Supply Card (SM261A-CARD)
  • Redundant Power Supply Cards (SM261A-VAC, SM261A-VDC)
  • Controller Cards (SM262A, etc.)
  • A/B Switch Cards (SM265A, etc.)
  • Blank Panel (SM279A-BLNK)
  • 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.



    Double Diamond Warranty

    Extended 1 Year Warranty Available

    Protect your purchase with an additional 1 Year Double Diamond™ warranty!
    Cost: $48.52

    Extended 3 Year Warranty Available

    Protect your purchase with an additional 3 Year Double Diamond™ warranty!
    Cost: $97.04


    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 Gang switch 18 card chassis 2U no cards installed 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.