Altronix T2M75LCK1D Dual-Output Access Control & Surveillance Power Supply System
Overview
The Altronix T2M75LCK1D is a multi-output, UL294-listed power supply and distribution system built for mid-to-large commercial access control and surveillance deployments that cannot afford a power failure. Housed in a 27.25" x 21.5" x 6.5" steel enclosure, it ships as a complete, integrated system combining two independent power supplies, a voltage regulator, a power distribution module with per-output PTC protection, and battery backup capacity for up to four 7AH/12VDC batteries — all in a single lockable cabinet. If you're wiring a multi-door access control system or a multi-camera surveillance run from a central IDF closet, the T2M75LCK1D is engineered to consolidate power, distribution, and backup into one rack-ready unit.
For a broader look at the Altronix power and access control line, including ancillary modules and enclosures, the full catalog covers everything from single-output supplies to large-scale distributed architectures.
Key Features
- Dual Independent Power Supplies: PS1 delivers 12VDC at 6A continuous (115VAC input, 2.6A draw, 5A/250V fused); PS2 delivers 24VDC at 10A continuous (115VAC input, 4.2A draw, 5A/250V fused). Running both outputs simultaneously lets you power 12VDC cameras or readers alongside 24VDC locks or panels from one enclosure — no separate supplies to coordinate or troubleshoot.
- ACMS8CB Distribution Module — Per-Output PTC Protection: Each of the eight distribution outputs is individually PTC-protected at 2.5A, with a 9A input PTC on the module itself. A shorted device trips only its own output, leaving the remaining seven unaffected. Each output is independently selectable between 12VDC and 24VDC — practical when your reader and lock on the same door run different voltages.
- Four-Battery Internal Backup (7AH/12VDC each): The enclosure holds four 7AH/12VDC batteries for up to 28AH of onboard standby capacity. Need longer runtime? The system supports external battery packs at 40AH or 65AH via a separate enclosure — enough to carry a multi-door site through an extended outage without generator involvement.
- Form-C Fault Supervision Contacts: AC Fail, Battery Fail, and Battery Presence each break out as Form-C dry contacts. Wire these directly to your access control panel's supervised inputs or a central monitoring system and you'll get annunciated fault conditions without polling the supply or adding a separate supervision module.
- Voltage Regulator Output (12VDC / 10A @ 24VDC reference): The onboard voltage regulator provides a stable 12VDC output, supporting loads that require tighter voltage tolerance than a raw transformer-rectifier supply — relevant for sensitive readers or controllers with narrow input windows.
- UL294 and cUL (CAN/ULC-S319-05) Listed: Both US and Canadian access control power supply standards are covered. For any installation requiring AHJ sign-off on power compliance — particularly in healthcare, education, or government facilities — this listing removes the field-approval burden. The CE mark extends coverage to European Conformity requirements.
- Operating Range 0°C to 49°C (32°F to 120°F): Covers standard indoor IDF rooms and utility closets, including those with marginal HVAC. Storage extends to 70°C, so the unit survives staging and warehouse environments without special handling.
- 206 BTU/Hr. Heat Dissipation: At full load, the enclosure dissipates 206 BTU/Hr. Factor this into your closet thermal budget — especially in sealed rooms where multiple active panels and switches already contribute heat load.
Integration & Compatibility
The T2M75LCK1D is designed for integration with commercial access control systems and IP surveillance infrastructure requiring centralized, code-compliant power. The ACMS8CB module's per-output voltage selectability (12 or 24VDC) accommodates mixed-voltage field devices — Wiegand and OSDP readers, electric strikes, maglocks, and request-to-exit devices — on the same distribution module. The relay rating of 28VAC or VDC at 2.5A covers the switching demands of most standard electrified hardware. The Form-C supervision outputs integrate directly with panels from major access control manufacturers that support supervised power inputs. For installations requiring dedicated access control power supplies at individual doors rather than centralized distribution, the Altronix line includes single- and dual-output alternatives suited to distributed architectures.
When planning battery runtime, account for total connected load across all eight outputs against the 28AH internal capacity (or 40/65AH with an external pack). Runtime calculations should be performed per AHJ requirements — the supervision contacts make it straightforward to report battery state to the head-end without manual field checks.
Frequently Asked Questions
Q: What are the two power supply output voltages and currents in the T2M75LCK1D?
A: Power Supply 1 outputs 12VDC at 6A continuous. Power Supply 2 outputs 24VDC at 10A continuous. Both run from 115VAC/60Hz input.
Q: How many batteries fit inside the enclosure, and can the backup capacity be extended?
A: The enclosure holds up to four 7AH/12VDC batteries (28AH total onboard). Backup capacity can be extended to 40AH or 65AH using a separate external battery enclosure.
Q: Is the T2M75LCK1D UL listed for access control power applications?
A: Yes. The T2M75LCK1D carries a UL294 listing (US access control power), a cUL listing to CAN/ULC-S319-05 (Canada), and CE (European Conformity).
Q: Can I mix 12VDC and 24VDC outputs on the ACMS8CB distribution module?
A: Yes. Each of the eight ACMS8CB outputs is individually selectable between 12VDC and 24VDC, so you can power mixed-voltage devices — readers, locks, cameras — from the same module.
Q: What happens if one output on the distribution module shorts out?
A: Each output is individually PTC-protected at 2.5A. A fault on one output trips only that output's PTC; the remaining seven outputs stay live. The module-level input PTC is rated at 9A.
Q: Does the T2M75LCK1D provide any fault supervision outputs for integration with a monitoring system?
A: Yes. Three Form-C dry-contact outputs are provided: AC Fail, Battery Fail, and Battery Presence. These wire directly to supervised inputs on access control panels or central monitoring equipment.
The T2M75LCK1D is the kind of unit I recommend when an integrator needs to consolidate power and distribution for a multi-door commercial site without building a rat's nest of individual supplies. The dual-supply architecture — 12VDC/6A on PS1 and 24VDC/10A on PS2 — covers virtually every mixed-voltage field device scenario in one steel cabinet, and the UL294 listing means you're not having to argue with the AHJ over code compliance on the power side.
Technical Highlights:
- ACMS8CB Per-Output PTC at 2.5A: Individual PTC protection on each of eight outputs means a shorted lock or reader doesn't take down the rest of the run — a real-world failure mode that trips up integrators using non-protected distribution blocks.
- 28AH Internal / Up to 65AH Extended Backup: Four 7AH batteries fit inside the enclosure; an external pack bumps you to 65AH. For a 10-door site at modest standby current, that buys you well beyond a standard 4-hour UL backup requirement without a separate battery cabinet in the closet.
- Form-C Supervision on AC Fail, Battery Fail, and Battery Presence: Three independently supervised Form-C outputs let you annunciate power faults at the head-end panel without any added monitoring hardware. This is non-negotiable on UL-listed systems and it's built in here.
Deployment Considerations:
- At 49.6 lb. and 27.25" x 21.5" x 6.5", this is a two-person wall-mount job — plan your rough-in accordingly and confirm your backbox clearance before scheduling the install crew.
- The 206 BTU/Hr. dissipation at full load is meaningful in a sealed IDF closet that already carries switch and controller heat — verify your closet's thermal headroom before specifying this as the sole power solution in a hot room.
This unit is best positioned for 8-to-16 door commercial access control installations — corporate lobbies, healthcare clinics, multi-tenant office build-outs — where mixed 12/24VDC field devices, code-compliant backup, and supervised fault reporting are all required from a single, inspectable power point.
