Altronix T2CSK7F8SD 24VDC 10A UL294 Surveillance Power Supply with Battery Backup
Overview
The Altronix T2CSK7F8SD is a commercial-grade, UL294-listed power supply and battery backup system engineered for mid-to-large surveillance and access control installations. Housed in a substantial 27.25" x 21.5" x 6.5" steel enclosure, it delivers selectable 12VDC at 6A or 24VDC at 10A output — giving integrators the flexibility to standardize on a single power distribution platform across mixed-voltage camera and controller deployments. If your installation has grown past what smaller distributed supplies can manage cleanly, the T2CSK7F8SD is the consolidation point worth evaluating. Browse the full Altronix power and access infrastructure catalog to see how this unit fits into broader system designs.
Key Features
- Dual Selectable Output Voltage (12VDC/24VDC): Switch between 6A at 12VDC or 10A at 24VDC to match your device mix — no separate supplies needed for a hybrid camera and door-controller panel. Fewer enclosures, fewer failure points.
- 10A Continuous Output at 24VDC: Enough headroom to drive a meaningful cluster of 24V pan-tilt cameras or access control panels without riding the supply's thermal ceiling. At 77 BTU/Hr heat dissipation, the unit runs within manageable thermal bounds for most equipment-room environments.
- Integrated 12AH/12VDC Battery Backup: On AC loss, the onboard 12AH battery sustains connected devices — critical for UL294-compliant access control installations where door hardware must remain powered through a grid interruption. Size your load against the 12AH capacity before assuming full-night holdover.
- PTC (Resettable) Output Protection at 2.5A per Output: Polymer resettable fuses eliminate the fuse-replacement service call after an overload. Each PTC-protected output is rated 2.5A at 12VDC or 24VDC — design your branch circuits to stay under that threshold per run.
- Form C Relay Output (28VAC/VDC @ 2.5A): The supervised Form C relay lets you report power-fault conditions back to a panel or monitoring system — a concrete compliance feature for UL294 access control installs that require tamper and fault supervision.
- UL294, cUL s319-05, and CE Listed: UL294 listing is a hard requirement for access control power supplies in most commercial jurisdictions. The cUL s319-05 listing covers Canadian installations. CE marks the unit for European deployments. Verify AHJ requirements for your region before spec'ing.
- 120VAC / 4.5A Input: Draws from standard North American single-phase power — no dedicated circuit sizing surprises beyond a standard 15A branch circuit, even at full load.
- 0°C to 49°C Operating Range: Covers typical equipment-room and indoor-enclosure environments. Not rated for outdoor or unheated spaces — plan accordingly for installations in mechanical rooms that drop below freezing in winter.
Integration and Compatibility
The T2CSK7F8SD fits naturally into access control and surveillance camera infrastructure where a centralized, battery-backed supply is preferable to distributed wall-mount adapters. The Form C relay output integrates with panel supervision inputs. PTC-protected outputs suit individual device drops or short home-run cable runs. Pair this supply with a structured PoE switch for IP camera power where 24VDC legacy devices and PoE endpoints coexist in the same enclosure rack. For installations requiring a power planning reference, the power planning guide covers load calculation methodology relevant to this class of supply.
Frequently Asked Questions
Q: What output voltages does the T2CSK7F8SD support?
A: The T2CSK7F8SD supports selectable 12VDC at 6A or 24VDC at 10A output. You configure for one voltage at a time — it is not a simultaneous dual-voltage supply.
Q: Is the T2CSK7F8SD UL294 listed for access control applications?
A: Yes. The T2CSK7F8SD carries UL294 and cUL s319-05 listings, making it suitable for access control power supply applications in the US and Canada where those listings are required by the AHJ.
Q: What battery does the T2CSK7F8SD support, and how long will it hold over?
A: The unit accommodates a 12AH/12VDC sealed lead-acid battery. Holdover time depends entirely on connected load — calculate amp-hours against your actual device draw to determine runtime during AC outage.
Q: What is the PTC output rating on the T2CSK7F8SD?
A: Each PTC-protected output is rated 2.5A at 12VDC or 24VDC. The resettable fuse trips on overload and self-resets once the fault clears — no fuse replacement required.
Q: Can the T2CSK7F8SD be used in outdoor or unheated enclosures?
A: The rated operating temperature is 0°C to 49°C. It is not specified for sub-freezing environments, so outdoor or unheated mechanical-room installations require additional thermal management or a different supply rated for wider temperature extremes.
The T2CSK7F8SD sits in that useful middle tier of Altronix's enclosure-based supply lineup — large enough at 10A/24VDC to consolidate power for a meaningful camera cluster or multi-door access panel, but not so oversized that it becomes a liability in a space-constrained IDF or security closet. The 27.25" x 21.5" x 6.5" steel enclosure is substantial; verify your wall or rack space before ordering.
Technical Highlights:
- 10A at 24VDC Output: At full rated output with 77 BTU/Hr dissipation, the unit stays within thermal tolerances for enclosed equipment rooms maintaining standard 0°C–49°C conditions — no forced cooling required under normal load.
- UL294 / cUL s319-05 Listings: These are the credentials that matter for access control AHJ approval in North America. The CE listing extends the unit's applicability to European projects.
- Form C Relay at 28VAC/VDC / 2.5A: This relay is the supervision output that connects back to your panel or monitoring receiver — without it, you're flying blind on power faults. It's a meaningful differentiator for compliant installations over non-supervised alternatives.
Deployment Considerations:
- The 12AH battery capacity sets a hard ceiling on holdover time — do the math on your connected load before promising a runtime figure to a customer or AHJ inspector. A 10A load drains a 12AH battery in roughly 72 minutes under ideal conditions, real-world less.
- Input draw is 4.5A at 120VAC — confirm your branch circuit has sufficient capacity, especially if other equipment shares the same circuit in a retrofit installation.
This supply is a strong fit for mid-size commercial access control installs — think 4- to 8-door systems with co-located camera power requirements — where a single UL294-listed, battery-backed enclosure simplifies both the installation and the inspection paperwork.
