BLACK BOX 

BLACK BOX SM265A GANG SWITCH - 2U, RS232/DB25, A/B CARD, LATCHING

Mfg Part Number:  SM265A  
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Price: $639.05 + Free Shipping
Quantity:
In Stock/Mfg Direct Ship
Last Updated: Jan 25, 2026
No Sales Tax except these states
, PO and Wire.

Pick a card, any card.
A/B Switch Cards are available for RS-232, video, fiber optic, and CAT5e/CAT6 connections. The card featured here is the DB25/RS-232. Use the system for both new and legacy applications. You can add cards for fast CAT6 10-GbE 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.

Ordering Instructions:

First, order the chassis...

Pro Switching System, 2U, 18-Card (SM260A)

Next order at least one power supply

Power Supply Cards:

Redundant Power Supply Cards (NOTE: cards requires two chassis slots.):

100 - 240-VAC Input (SM261A-VAC)

-48-VDC Input (SM261A-VDC)

Or order:

AC External Adapter Card (SM261A-CARD) ( NOTE: card requires one chassis slot.)

And at least one power supply (order two for redundant power)...

Power Supply, 120 - 240 VAC, External (SM961A-PS)

...then select a Controller Card...

RS-232/Ethernet (SNMP) (SM262A)

RS-232 Only (SM263A)

SNMP Expansion (SM264A)

...next 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.

Main Specification
General Information
Manufacturer Black Box Corporation
Manufacturer Part Number SM265A
Manufacturer Website Address http://www.blackbox.com
Brand Name Black Box
Product Name Pro Switching Gang Switch - 2U, RS-232/DB25, A/B Card, Latching
Product Condition New
Product Type Expansion Module
Technical Information
Application/Usage Switching Network
Interfaces/Ports
Total Number of Ports 3
Connector Type DB-25
Interfaces/Ports Details 2 x DB-25 Serial
Interfaces/Ports Details 1 x DB-25 Serial
Miscellaneous
Compatibility

Black Box Pro Switching SM260A Switch Chassis

Country of Origin United States
TAA Compliant Yes
Environmentally Friendly Yes
Environmental Compliance Restriction of Hazardous Substances (RoHS)
Warranty
Limited Warranty 1 Year
WARNING:: The plastic used in cable products can expose you to lead and lead components, chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information go to www.P65Warnings.ca.gov
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