Altronix MAXFIT7512APS 20A 12/24VDC 12-Output Access Control Power Supply

Overview

The Altronix MAXFIT7512APS is a 20-amp, 12/24VDC access control power distribution module that integrates the ACMS12 and PDS16 functionality into a single MAXFIT enclosure footprint. If you're running a multi-door access control deployment and need a clean, consolidated power architecture — one that doesn't require a separate enclosure for every power zone — this is the unit to evaluate. The MAXFIT7512APS supports twelve independently managed outputs and accepts both open collector sink activation and NO/NC trigger methods, giving integrators the flexibility to match the activation logic of virtually any access control panel on the market.

Key Features

• 20-Amp Output Rating: At 20A continuous, the MAXFIT7512APS can carry full load across all twelve outputs simultaneously without thermal throttling. That headroom matters in high-door-count installations where electric locks, mag-locks, and door strikes all draw current at strike time — often in overlapping bursts.
• 12/24VDC Dual Voltage Support: Field-selectable 12 or 24VDC operation means you're not locked into a single lock voltage. Mixed hardware environments — common in retrofit projects where legacy 12V locks coexist with newer 24V hardware — can be served from a single unit rather than requiring parallel power supplies.
• Twelve Discrete Outputs: Twelve individually switched outputs allow zone-by-zone control of access points, eliminators, or ancillary devices. Each output can be managed independently, which simplifies troubleshooting and prevents a single wiring fault from taking down an entire building floor.
• Open Collector Sink Activation: Open collector sink input compatibility means the MAXFIT7512APS pairs directly with the transistor outputs on most commercial access control panels — no relay interface board needed. This reduces component count and potential failure points in the control path.
• NO/NC Trigger Support: Support for both normally open and normally closed trigger inputs gives you flexibility when interfacing with alarm panels, relay boards, or security management systems that may output either logic state. You don't need to add inversion relays for NC-output devices.
• -10°C to +40°C Operating Range: Rated for environments from -10°C to +40°C (14°F to 104°F), the MAXFIT7512APS is suitable for conditioned equipment rooms, IDF closets, and indoor utility spaces. It is not rated for unheated exterior enclosures in cold climates — plan accordingly when specifying for northern installations with unheated vestibules.
• ACMS12 and PDS16 Integration: Combining the ACMS12 access control module with PDS16 power distribution in a single MAXFIT chassis eliminates the need for separate enclosures and reduces rack or wall space consumption. In panel-constrained installations, that consolidation directly affects bid cost and installation time.

Integration and Compatibility

The MAXFIT7512APS is designed to drop into the Altronix MAXFIT chassis ecosystem, which means it pairs with other MAXFIT modules — power supplies, battery management, and distribution boards — in a unified enclosure. For integrators already standardized on Altronix access control power products, this unit extends that architecture without introducing a new enclosure format.

The dual-voltage output (12 or 24VDC) and trigger input flexibility make it compatible with access panels from major manufacturers. The open collector sink activation aligns with standard transistor output interfaces used by most commercial access control systems. If you're designing a system with a high door count, pairing the MAXFIT7512APS with a multi-door access control panel and a dedicated battery backup module within the same MAXFIT chassis is the cleanest path to a code-compliant, serviceable installation.

For deployments requiring PoE-powered door controllers or IP-based readers, plan a separate PoE switch for the network side — the MAXFIT7512APS handles hardwired lock power, not network power delivery.

Frequently Asked Questions

Q: What is the maximum continuous output current of the MAXFIT7512APS?

A: The MAXFIT7512APS is rated for 20 amps of continuous output current across its twelve outputs at either 12 or 24VDC.

Q: How many outputs does the MAXFIT7512APS provide?

A: The MAXFIT7512APS provides twelve discrete, independently switched outputs, allowing zone-by-zone control of access points or ancillary devices.

Q: What activation methods does the MAXFIT7512APS support?

A: It supports open collector sink activation and both normally open (NO) and normally closed (NC) trigger inputs, making it compatible with the transistor outputs and relay outputs found on most commercial access control panels.

Q: What voltage options does the MAXFIT7512APS support?

A: The unit supports 12VDC and 24VDC output, allowing integrators to match the lock voltage required by the installed hardware.

Q: What is the operating temperature range for the MAXFIT7512APS?

A: The MAXFIT7512APS is rated for operation between -10°C and +40°C (14°F to 104°F), making it suitable for conditioned indoor environments such as equipment rooms and IDF closets.

Q: What does the MAXFIT7512APS integrate — what are the ACMS12 and PDS16?

A: The MAXFIT7512APS combines the Altronix ACMS12 access control module and PDS16 power distribution board within a single MAXFIT chassis, consolidating access control power management and distribution without requiring separate enclosures for each function.

Karl Wilson

The MAXFIT7512APS is a unit I'd specify when a project has enough doors to make individual power supplies per zone impractical but not enough budget or panel space to justify a fully distributed architecture. The 20A output rating across twelve discrete outputs is the core spec that drives the selection logic — that's enough current to cover a full floor of electric strikes or mag-locks under realistic simultaneous-activation scenarios without requiring a secondary supply as a buffer.

Technical Highlights:

• 20A at 12 or 24VDC: Covers twelve outputs at full load, which handles most mid-size floor deployments without current starvation during peak activation — the scenario where cheap power supplies fail silently.
• Open Collector Sink + NO/NC Trigger: These two activation modes cover the vast majority of commercial panel output types without requiring an intermediate relay board — fewer components means fewer points of failure in the activation path.
• -10°C to +40°C Operating Range: Keeps this unit inside conditioned spaces only; the upper end of 40°C means a poorly ventilated utility closet in summer can push the boundary — thermal planning at installation is not optional.

Deployment Considerations:

• The MAXFIT chassis system is modular — confirm which companion modules (battery management, main power supply) are required for your specific deployment before ordering the MAXFIT7512APS alone; it is a sub-assembly, not a standalone supply.
• The 40°C upper temperature limit is a hard ceiling; in utility closets that double as mechanical rooms, measure ambient temperature before commissioning — exceeding this spec voids the operating envelope.

The MAXFIT7512APS is the right call for corporate office buildouts and education facilities with 6–12 controlled doors per floor, where consolidating ACMS and power distribution into one MAXFIT enclosure per riser closet keeps the installation clean, serviceable, and within budget.