Altronix MAXFIT7FD 24VDC 10A 8-Output Power Distribution Unit
Overview
The Altronix MAXFIT7FD is a 24VDC, 10-amp multi-output power distribution unit designed for commercial security installations where a single reliable power source needs to serve multiple downstream devices simultaneously. With eight individually protected outputs and a universal AC/DC input, the MAXFIT7FD fits into existing infrastructure without requiring a dedicated transformer upgrade on every installation.
Each of the eight outputs is rated at 2.5A and uses Class 2 rated PTC (positive temperature coefficient) auto-resettable overcurrent protection — meaning a fault on one circuit won't pull down the entire panel and won't require manual fuse replacement when the fault clears. For integrators managing multi-reader access control runs or powering distributed access control hardware, that self-resetting behavior matters when a building manager calls at 2 AM because a door isn't responding.
Key Features
- 24VDC Output at 10A Total: The full 10A budget is available across the eight outputs simultaneously, supporting up to eight 2.5A loads. That's enough headroom to power door controllers, mag-locks, request-to-exit devices, and panel peripherals from a single distribution point without running dedicated power drops to each device.
- Universal 12–24V AC or DC Input: The MAXFIT7FD accepts 12 to 24 volt AC or DC at its input. This matters in retrofit scenarios where the building's existing transformer doesn't match the output you need — you can feed it from a wide range of existing panel supplies or step-down transformers already on site rather than replacing infrastructure.
- 8 Class 2 PTC-Protected Outputs: Each output carries Class 2 NEC classification, which limits voltage and current to levels defined as safe for wiring without conduit in many jurisdictions — relevant when running wire through ceiling plenum or tenant spaces. The auto-resettable PTC protection eliminates blown fuses as a service call driver; once the overload condition clears, the output restores automatically.
- 2.5A Per Output Rating: At 2.5A per channel, each output can comfortably handle most electric strikes (typically 0.5–1A), magnetic locks (typically 0.5A hold), or powered door hardware. Devices drawing more than 2.5A will trip that output's PTC — a useful built-in guard against wiring faults or mis-spec'd hardware.
- Standalone Distribution Architecture: The MAXFIT7FD functions as a power distribution unit within a larger system architecture — it accepts regulated input and distributes it to field devices, keeping your panel power supply separate from the distribution layer. This simplifies troubleshooting: power problems are isolated to either the supply or the distribution stage, not intermixed.
- Compact 20.50 x 16.50 x 6.25-inch Enclosure: At 25.75 lbs with a footprint that fits within standard equipment closet depth, the MAXFIT7FD can be wall-mounted or rack-adjacent without consuming a full rack unit. In IDF closets where space is tight, that physical profile matters as much as electrical ratings.
Integration & Compatibility
The MAXFIT7FD integrates into security and surveillance power supply architectures as a downstream distribution layer. Its Class 2 output rating makes it compatible with wiring schemes that need to meet NEC Class 2 requirements without additional current-limiting devices on each run. The broad 12–24V AC/DC input range allows pairing with a wide variety of upstream regulated supplies from Altronix and compatible vendors.
Integrators designing access control power systems with multiple door controllers, readers, or locking hardware will find the eight-output format aligns with common multi-door panel architectures — four to eight doors per IDF is a standard deployment density. When combined with a battery-backed Altronix supply upstream, the MAXFIT7FD extends that backup capability to all eight output circuits without any additional configuration.
For larger deployments or where outputs need to be expanded further, consider pairing with additional distribution modules or a higher-amperage supply feeding multiple MAXFIT7FD units. Each unit's independent PTC protection means a fault on one unit's outputs doesn't cascade to parallel distribution modules on the same bus.
Frequently Asked Questions
Q: What is the input voltage range for the MAXFIT7FD?
A: The MAXFIT7FD accepts 12 to 24 volt AC or DC at its input, giving integrators flexibility to pair it with a wide range of existing upstream supplies or transformers without requiring a dedicated input voltage.
Q: How many outputs does the MAXFIT7FD provide, and what is the per-output current rating?
A: The MAXFIT7FD provides 8 outputs, each rated at 2.5A. Total output capacity is 10A at 24VDC across all eight channels.
Q: What type of overcurrent protection is used on each output?
A: Each output uses Class 2 rated PTC (positive temperature coefficient) auto-resettable overcurrent protection. When a fault or overload condition clears, the affected output restores automatically — no manual fuse replacement required.
Q: What is the output voltage of the MAXFIT7FD?
A: The MAXFIT7FD outputs 24VDC.
Q: What are the physical dimensions and weight of the MAXFIT7FD?
A: The unit measures 20.50 x 16.50 x 6.25 inches and weighs 25.75 lbs.
Q: Are the MAXFIT7FD outputs Class 2 rated?
A: Yes. All eight outputs are Class 2 rated per NEC definitions, which allows wiring in many plenum and tenant-space applications without additional current-limiting devices on each run.
The Altronix MAXFIT7FD is one of those infrastructure pieces that doesn't get talked about much but determines whether a multi-door access control deployment holds together in the field. The 10A at 24VDC total budget distributed across eight individually PTC-protected 2.5A outputs means you can wire an entire four-to-eight-door IDF zone from a single distribution point — and when someone shorts a wire run during a tenant renovation, only that circuit trips, not the whole panel.
Technical Highlights:
- PTC Auto-Resettable Protection: Unlike fused outputs that require a technician to physically replace a blown fuse, PTC devices self-reset when the fault clears. On an eight-output unit like the MAXFIT7FD, that eliminates up to eight potential after-hours service calls per unit.
- 12–24V AC/DC Input Range: The wide input tolerance means the MAXFIT7FD can sit downstream of virtually any regulated supply already in the field — useful in retrofit projects where the existing transformer is 16VAC and a full power infrastructure replacement isn't in scope.
- Class 2 Output Classification: All eight outputs meet NEC Class 2 current and voltage limits, simplifying the wiring inspection conversation in jurisdictions that scrutinize low-voltage runs in plenum and tenant spaces.
Deployment Considerations:
- At 2.5A per output, verify the locked current draw of any electric strike or mag-lock you plan to wire — some higher-force mag-locks draw 600–900mA hold but spike significantly at energization. Size with margin, not at the limit.
- The unit weighs 25.75 lbs and measures 20.50 x 16.50 x 6.25 inches — plan the enclosure mounting point accordingly. Wall blocking or a proper equipment backboard is worth specifying in the rough-in stage rather than discovering the drywall can't support it during commissioning.
The MAXFIT7FD is the right call for a commercial office or mixed-use building IDF where you're centralizing power for four to eight access-controlled doors and need per-circuit fault isolation without burning service hours on blown fuses. It's a distribution layer, not a power supply — pair it with a battery-backed Altronix supply upstream and your 24VDC access control infrastructure becomes genuinely resilient.
