Altronix MAXFIT16A4 12/24VDC Multi-Output Power Supply Module

Overview

The Altronix MAXFIT16A4 is a compact, multi-output DC power supply module designed for access control and video surveillance installations where reliable, distributed power delivery is non-negotiable. Accepting 12–24 VAC/VDC input and delivering regulated 12–24 VDC at up to 4A across four independent outputs, this unit gives integrators the flexibility to power multiple field devices from a single source — without the cost and complexity of running individual power supplies to every reader, lock, or camera. If you're spec'ing power for a mid-size access control panel installation or a distributed IP camera deployment, the MAXFIT16A4 is built for exactly that kind of work.

Key Features

• Wide Input Voltage Range (12–24 VAC/VDC): Accepts both AC and DC input across the 12–24V range, so it integrates directly with the broad range of transformers and panel supplies already common in commercial security installations — no step-down converter, no additional conditioning hardware needed.
• Regulated 12–24 VDC Output: Delivers clean, regulated DC output at the voltage your field devices require. Regulated output means devices don't see voltage sag under load — critical for electronic locks and card readers that can misfire or reset on dirty power.
• 4A Total Output Capacity: Four amps distributed across four outputs gives you meaningful headroom for powering a mix of mag-locks, readers, and low-current sensors simultaneously. Map your load budget before commissioning: at 12VDC, a standard 600-lb mag-lock draws ~500mA, leaving substantial capacity for co-located readers and sensors on the remaining outputs.
• 4 Independent Outputs: Individual output circuits mean a fault or short on one field run won't collapse power to the other three — a meaningful advantage over daisy-chained single-output supplies when a wiring fault in one zone would otherwise take down an entire wing.
• Compact 6.25 × 16.50 × 20.50 in Form Factor: Sized to fit inside standard Altronix enclosures, the MAXFIT16A4 keeps your panel footprint manageable when wall space is constrained in IDF closets or server rooms. At 24.8 lbs, it has the heft of a properly built commercial unit — plan your enclosure wall anchoring accordingly.
• Dual-Voltage Output Flexibility: Configurable for 12 or 24VDC output means a single SKU covers both 12V-native (most card readers, many IP cameras on local power) and 24V-native (most electronic strikes and some PTZ cameras) without stocking two separate supplies.
• Commercial-Grade Construction: Designed for around-the-clock operation in commercial security environments — the load profile of access control and surveillance infrastructure demands a supply built to sustain continuous draw, not burst-rated consumer hardware.

Integration & Compatibility

The MAXFIT16A4 is built to integrate within the broader Altronix power distribution ecosystem, pairing with Altronix's ACM access control modules (the ACM4 is referenced in the product configuration) and the BC750 battery charger/enclosure platform. This makes it a natural fit for installations where you're already running Altronix infrastructure — the module slots into the MAXFIT enclosure family, consolidating power, battery backup, and access control relay logic into a single wall-mounted unit.

For surveillance and access control power supplies, the dual-voltage output and wide input acceptance make it compatible with most commercial panel architectures from Honeywell, DMP, Bosch, and similar manufacturers — provided you verify input voltage compatibility with your specific panel's auxiliary output. Consult your access control system documentation to confirm output current limits on the panel's AUX terminals before sizing this module as a downstream load.

When planning cable runs to field devices, factor voltage drop across wire runs at 4A total draw. For 24VDC outputs driving loads at the far end of long runs, use the Altronix voltage drop tables or a standard Ohm's law calculation — a 2% drop budget is the standard commercial threshold before device reliability suffers.

Frequently Asked Questions

Q: What input voltage does the MAXFIT16A4 accept?

A: The MAXFIT16A4 accepts 12–24 VAC or VDC input, giving it broad compatibility with standard transformer and panel auxiliary outputs common in commercial security installations.

Q: How many output circuits does the MAXFIT16A4 provide, and what is the total output current?

A: It provides 4 independent output circuits with a total output capacity of 4A at 12–24 VDC. Individual outputs allow zone isolation so a fault on one run does not affect the others.

Q: What enclosure or platform is the MAXFIT16A4 designed to work with?

A: The MAXFIT16A4 is part of the Altronix MAXFIT platform and is designed to integrate with the ACM4 access control module and BC750 battery charger enclosure within the Altronix ecosystem.

Q: Can the MAXFIT16A4 output both 12V and 24V?

A: Yes. The output is configurable for either 12 VDC or 24 VDC, allowing a single unit to serve installations with mixed-voltage device requirements.

Q: What are the physical dimensions and weight of the MAXFIT16A4?

A: The unit measures 6.25 × 16.50 × 20.50 inches and weighs 24.8 lbs. Plan enclosure wall anchoring to support that weight in a permanent installation.

Marty Allison

The MAXFIT16A4 is the power module I reach for when a mid-size access control job needs clean, distributed DC without the overhead of running dedicated supplies to every strike and reader. Four independent outputs at a combined 4A, configurable for 12 or 24VDC output from a 12–24 VAC/VDC source — that's a lot of flexibility baked into a 6.25 × 16.50 × 20.50 in footprint that drops into the Altronix MAXFIT enclosure family without custom hardware.

Technical Highlights:

• 4 Independent Output Circuits: Fault isolation per output is the real value here — a wiring short on one door's lock circuit doesn't collapse power to the remaining three zones, which matters when you're protecting multiple entry points on a single panel.
• 12–24 VAC/VDC Input Flexibility: Taking both AC and DC input across the same voltage range means this module works downstream from virtually any commercial panel's auxiliary output or a dedicated 16–18VAC transformer — no additional conditioning stage required.
• Dual-Voltage DC Output (12 or 24VDC @ 4A): Configuring for 24VDC output extends your cable run budget for mag-locks at the end of longer conduit paths — a 24V lock loses less to drop than its 12V equivalent at the same gauge and distance.

Deployment Considerations:

• At 24.8 lbs, the MAXFIT16A4 has real mass — verify your enclosure back-box anchoring into stud or masonry before mounting; a drywall anchor spec'd for a lighter supply won't hold long-term in a commercial environment with door-slam vibration nearby.
• The 4A total output is shared across all four circuits — budget each output carefully if you're driving two mag-locks simultaneously; a pair of 600mA locks plus two dual-tech readers can approach 60–70% of total capacity before you've added any camera or alarm device loads.

The MAXFIT16A4 is the right call for a 4–8 door commercial access control deployment where the integrator is already running Altronix ACM modules and needs consolidated power, relay logic, and battery backup in a single enclosure — not a general-purpose bench supply or a fit for high-density 16+ door installations that need more total current.