Altronix MAXFIT75FD Dual-Voltage 8-Output Power Distribution Unit
Overview
The Altronix MAXFIT75FD is a dual-voltage power distribution unit combining 24VDC at 10A and 12VDC at 10A outputs across eight individually fused channels — purpose-built for mid-scale access control and surveillance installations where devices running on different voltage rails share a single enclosure. If you're commissioning a mixed panel with both 24V access control hardware and 12V cameras or readers, the MAXFIT75FD eliminates the need for a second supply unit. It integrates two ACM8CB power distribution modules and a BC750 battery charger within a single chassis, so backup power is built in rather than bolted on. Explore the full Altronix power solutions line for complementary distribution and charging hardware.
Key Features
- Dual-Voltage Output (24VDC & 12VDC, 10A each): Running separate 24V and 12V supplies for a mixed installation doubles your cabinet footprint and wiring complexity. The MAXFIT75FD consolidates both rails in one chassis — 10A per voltage rail covers a realistic mix of readers, cameras, and control boards without stringing multiple supplies.
- 8 Individually Fused Outputs, 2.5A per Channel: Each of the eight outputs is individually fused at 2.5A, so a short on one device doesn't cascade and drop the entire panel. Troubleshooting a fault means isolating one circuit, not hunting across an entire rack. This matters in high-uptime access control environments where a false panel-wide outage costs more than the hardware.
- Integrated BC750 Battery Charger: The onboard BC750 battery charger handles standby battery maintenance internally. For UL-listed installations requiring battery backup, having the charger built into the same enclosure simplifies wiring, reduces connection points, and supports code compliance without adding a separate charging unit to the cabinet.
- Wide Input Voltage Range (12–24V AC/DC): The 12–24V AC/DC input range provides flexibility for sites with varying transformer outputs and makes the unit compatible with a broader range of upstream infrastructure without a step-down transformer.
- Compact Chassis for Dense Installations: At 6.25 × 16.50 × 20.50 inches and 25.75 lbs, the MAXFIT75FD is sized for standard equipment racks and IDF closets. The MAXFIT enclosure series is designed for access control power supply deployments where panel real estate is constrained.
- Dual ACM8CB Power Distribution Modules: Two ACM8CB modules handle the output distribution, providing clean fused delivery on both voltage rails within a single managed enclosure — reducing field assembly time compared to sourcing and wiring individual distribution boards.
Integration & Compatibility
The MAXFIT75FD is designed for integration into access control systems and multi-camera surveillance installations requiring simultaneous 12V and 24V power delivery. The onboard battery charger is relevant for any installation requiring UL-compliant standby power. Systems engineers specifying power for door controllers, magnetic locks, proximity readers, and IP or analog cameras on a shared power budget should verify aggregate current draw against the 10A per rail rating and 2.5A per channel fuse limit before finalizing the load plan. For larger deployments, consider pairing with additional Altronix distribution hardware from the same family.
Frequently Asked Questions
Q: What are the output voltage and current ratings on the MAXFIT75FD?
A: The MAXFIT75FD provides 24VDC at 10A and 12VDC at 10A, with each of its 8 outputs fused at 2.5A per channel.
Q: Does the MAXFIT75FD include a battery charger?
A: Yes. It integrates an Altronix BC750 battery charger within the enclosure, supporting standby battery backup without a separate charging unit.
Q: What is the input voltage range for the MAXFIT75FD?
A: The unit accepts 12 to 24V AC or DC input, providing flexibility for different transformer configurations on site.
Q: How many outputs does the MAXFIT75FD support, and are they individually protected?
A: It provides 8 outputs, each individually fused at 2.5A, so a fault on one channel does not affect the rest of the distribution.
Q: What are the physical dimensions and weight of the MAXFIT75FD?
A: The enclosure measures 6.25 x 16.50 x 20.50 inches and weighs 25.75 lbs.
The MAXFIT75FD is one of those units that earns its place in a panel by solving a specific, recurring problem: you have devices that need 24V and devices that need 12V, and you don't want two separate supplies eating cabinet space. With 10A available on each rail and 8 individually fused 2.5A outputs, it handles a realistic mixed load — think door controllers and mag-locks on the 24V side, readers and cameras on the 12V side — without a second enclosure.
Technical Highlights:
- Dual 10A Rails: 24VDC and 12VDC each at 10A means you have genuine headroom for mixed-voltage deployments — not a token secondary output, but a full-rated second rail.
- 8 × 2.5A Fused Outputs: Per-channel fusing limits fault propagation. A shorted device trips its own fuse without affecting the remaining seven outputs — critical in any panel where uptime matters.
- Integrated BC750 Charger: Battery backup is handled inside the same chassis. For UL standby power compliance, this removes the need to source, mount, and wire a separate charger — a real time saver during commissioning.
Deployment Considerations:
- Verify that total load per rail stays within the 10A rating. Eight outputs at 2.5A each gives a theoretical 20A draw — the rail itself caps at 10A, so plan your load distribution across channels accordingly.
- At 25.75 lbs and 20.50 inches tall, this is a substantial enclosure. Confirm rack or wall-mount space and weight rating before specifying it for a shallow IDF cabinet.
The MAXFIT75FD is the right call for mid-size commercial access control installs — corporate office entry systems, multi-door retail loss prevention, or campus building controllers — where a single managed enclosure with integrated backup charging simplifies both the installation and the maintenance cycle.
