Altronix T2AXK7F8S2D 24VDC 10A Access Control Power Supply with 8-Output Distribution

Overview

The Altronix T2AXK7F8S2D is a UL294-listed, 24VDC/10A centralized power and access control distribution unit designed for mid-to-large commercial installations where clean, monitored power delivery to multiple door controllers is non-negotiable. Housed in a steel enclosure measuring 27.25" x 21.5" x 6.5", this unit ships ready for panel-room or closet mounting and supports up to 8 independently PTC-protected access controller outputs — making it the right product when you need a single, auditable power source that keeps each door circuit isolated from its neighbors. Altronix access control power supplies are known in the integration community for their practical field architecture, and the T2AXK7F8S2D fits squarely in that tradition.

Key Features

• 24VDC at 10A Output: A full 10 amps at 24VDC gives you meaningful headroom across 8 controller outputs — roughly 1.25A available per output before you even factor in PTC current sharing. Sized for multi-reader panel installations rather than single-door deployments.
• 8 Independent Access Controller Outputs: Each of the 8 outputs feeds a separate access controller. When one door circuit trips a fault, the other seven keep running — this is the practical reason to use an Altronix distribution chassis over home-run wiring from a single supply.
• Per-Output PTC Protection at 2.5A: Polymeric positive-temperature-coefficient (PTC) overcurrent devices at each output reset automatically after a fault clears. No blown fuses to hunt down at 2 a.m. — the 2.5A rating per output is generous enough for typical controller current draws while still catching dead shorts.
• Power Distribution Module PTC at 9A: The distribution module carries a 9A PTC on the bus side, providing a second tier of protection upstream of the individual outputs. This two-layer scheme means a wiring fault at a remote panel is arrested before it can drag down the main bus.
• Relay Outputs Rated 28VAC/VDC @ 2.5A: The 8 relay contacts are rated for 28VAC or 28VDC at 2.5A each — adequate for dry-contact lock releases, request-to-exit devices, and door position monitoring without needing external relay boards in most conventional electromechanical lock applications.
• Battery Backup Ready — 12AH/12VDC: Provisions for a 12AH, 12VDC battery mean you can maintain door-controller power through a brief outage without a separate UPS. Standby runtime depends on actual load, but a 12AH cell at typical access controller draws (under 500mA per controller) buys meaningful bridge time.
• 120VAC/60Hz Input: Standard North American single-phase input — plugs into any utility outlet or panel breaker without transformer selection or voltage conversion decisions on site.
• UL294 / cUL / CE Listed: UL294 is the specific standard for access control system equipment. Listing under UL294 (plus Canadian cUL and European CE) means the unit has been independently tested to the access control standard your AHJ and insurance carrier expect to see — not just a generic UL file number.
• 0°C to 49°C Operating Range: Covers equipment rooms and telecom closets across most building environments. Storage down to -20°C handles shipping and staging in cold climates without battery damage concerns.
• Enclosure at 27.25" x 21.5" x 6.5": A dedicated steel enclosure this size gives installers a proper wire management space — access controller boards, power connections, and battery all land in one lockable box rather than being distributed across multiple mounting surfaces.

Integration & Compatibility

The T2AXK7F8S2D is designed to supply and distribute power to access controller boards — it is not itself an access controller. Plan your installation around the specific current draw of your chosen controller hardware: each output is PTC-protected at 2.5A, so verify that your panel's worst-case inrush (particularly during lock energize cycles) stays within that threshold. The 28VAC/VDC, 2.5A relay rating accommodates most magnetic locks and electric strikes in direct-drive configurations; fail-safe locks with higher inrush may require external suppression diodes or lock power from a dedicated supply. The 12AH battery provision pairs with standard 12V sealed lead-acid cells — confirm physical clearance inside the enclosure before specifying a tall-case battery. UL294 listing is relevant for installations requiring access control equipment listing by the authority having jurisdiction; confirm with your AHJ that the specific application meets listing scope. For Altronix access control power solutions, this unit sits in the mid-capacity tier — appropriate for 4-to-8 door clusters where a single enclosure simplifies inspection and maintenance. If you are building out a larger access control system, evaluate whether a higher-output Altronix platform or a distributed power architecture better matches your door count. For guidance on planning power distribution in multi-door deployments, see our access control power planning guide. Complement this supply with appropriate electromechanical door hardware and confirm lock supply voltage matches your chosen lock specification before ordering.

Frequently Asked Questions

Q: What input voltage does the T2AXK7F8S2D require?

A: The T2AXK7F8S2D accepts 120VAC at 60Hz — standard North American single-phase utility power. No step-down transformer or voltage selection is needed for US installations.

Q: How many access controller outputs does the T2AXK7F8S2D provide, and are they independently protected?

A: It provides 8 access controller outputs. Each output is independently PTC-protected at 2.5A, so a fault or short on one output trips only that circuit and resets automatically once the fault clears — the remaining seven outputs stay live.

Q: What battery does the T2AXK7F8S2D support for backup power?

A: The unit provisions for a 12AH, 12VDC sealed lead-acid battery. Confirm physical dimensions of your chosen cell against the enclosure interior (27.25" x 21.5" x 6.5") before specifying a tall-case battery.

Q: What certifications does the T2AXK7F8S2D carry?

A: The T2AXK7F8S2D is listed under UL294 (the access control equipment standard), cUL (Canadian), and CE (European). UL294 listing is the certification most AHJs and insurance underwriters require for access control power equipment.

Q: What is the relay contact rating on the T2AXK7F8S2D?

A: Each of the 8 relay outputs is rated at 28VAC/VDC at 2.5A. This covers most conventional magnetic locks and electric strikes in direct-drive wiring; higher-inrush fail-safe locks may require suppression diodes or a separate lock power circuit.

Q: What are the operating temperature limits for the T2AXK7F8S2D?

A: Operating range is 0°C to 49°C (32°F to 120°F), suitable for conditioned equipment rooms and telecom closets. Storage temperature tolerance extends from -20°C to 70°C.

Jerry Tildsen

The T2AXK7F8S2D is one of those units I spec when an integrator wants to consolidate a 6-to-8 door cluster into a single inspectable enclosure without patching together individual supplies and relay boards. The 10A at 24VDC output, distributed across 8 PTC-protected outputs at 2.5A each, means you have real fault isolation between door circuits — a wiring nick at door 4 doesn't take down doors 1 through 8 while you're troubleshooting.

Technical Highlights:

• Dual-layer PTC protection: The 9A distribution module PTC upstream plus 2.5A per-output PTCs downstream means overcurrent is caught at both the bus and the individual circuit level — a fault at a remote controller board can't cascade back to the main bus.
• UL294 listing: This is the access control equipment standard specifically, not a generic UL file. That matters when the AHJ or a commissioning inspector asks for documentation — you hand them a UL294 listing, not a workaround.
• 12AH battery provision: At realistic access controller loads (well under 500mA per output at steady state), a 12AH cell provides meaningful bridge time through a short power interruption without a standalone UPS in the closet.

Deployment Considerations:

• Confirm the physical height of your backup battery cell before ordering — the enclosure is 27.25" x 21.5" x 6.5" and tall-case 12AH batteries can be a tight fit depending on manufacturer. Measure before you're on-site.
• Relay contacts are rated 28VAC/VDC at 2.5A. Fail-safe magnetic locks with higher inrush on energize will need a suppression diode or a dedicated lock supply — don't assume the relay contacts handle every lock type without checking the lock spec sheet first.

This unit is well-positioned for commercial office or campus building deployments where a 6-to-8 door cluster feeds off a single IDF or security closet — the steel enclosure, UL294 listing, and battery provisions make it a straightforward single-box answer for that specific scope.