Altronix MAXFIT3FE Expandable Power Supply System

Overview

The Altronix MAXFIT3FE is a single power supply unit designed for security and access control installations requiring flexible voltage options and scalable output capacity. Configured as part of an expandable power system architecture, the MAXFIT3FE delivers regulated 12VDC or 24VDC output at 6 amps maximum current, housed in a BC750 enclosure for wall or cabinet mounting. This unit is engineered for integrators and installers who need a compact, field-configurable power platform capable of supporting multiple loads across distributed security deployments.

Key Features

Dual Voltage Output: Field-selectable 12VDC or 24VDC operation accommodates mixed-voltage device ecosystems common in hybrid security systems

6A Maximum Current Rating: Supports multiple cameras, access control readers, intercoms, and auxiliary devices on a single supply unit

Expandable Architecture: Single supply unit design integrates into larger MAXFIT power system configurations, allowing phased capacity scaling without full system replacement

BC750 Enclosure: Compact, industry-standard form factor suitable for electrical closets, wall-mounted distribution, or cabinet integration

Battery Backup Capability: Supports auxiliary battery connections for emergency backup power during mains failure, protecting critical security devices

Regulated Output: Stable, filtered DC output minimizes voltage ripple and surge risk to connected load equipment

Flexible Integration: Compatible with standard DIN-rail mounting and cabinet installation methodologies

Single Supply Unit: Streamlined configuration reduces footprint and wiring complexity for smaller security installations or system expansion modules

Integration and Deployment

The MAXFIT3FE serves as a modular component within larger Altronix MAXFIT power system families, enabling integrators to configure custom capacity solutions by combining multiple units. This approach supports incremental system growth—adding supply units as coverage expands—without redesigning the entire power infrastructure. The BC750 enclosure accommodates standard electrical accessories, terminal blocks, and monitoring modules, facilitating rapid integration into existing security control architectures. Voltage selection between 12VDC and 24VDC is field-adjustable, allowing the same hardware SKU to serve diverse device requirements across access control, surveillance, and intercom subsystems. Battery backup terminals enable connection of auxiliary sealed lead-acid or lithium backup systems, extending critical device uptime during power loss events.

The MAXFIT3FE is particularly suited for distributed installations where centralized power consolidation is impractical. Integration with Altronix supervision and monitoring accessories (sold separately) provides remote health visibility and alerts for power failure, voltage anomalies, and battery status—critical operational telemetry for 24/7 security environments.

Ted Perry

Perspective based on aggregated IP Security Depot and affiliated engineering team experience.

I've specified the Altronix MAXFIT3FE in several mid-scale access control and surveillance retrofits where voltage flexibility and incremental expandability were driving requirements. The unit's modular single-supply architecture allows us to start lean on capacity and scale horizontally as system load increases, avoiding overprovisioning upfront capital on larger monolithic supplies.

Technical Highlights:

Voltage Flexibility: Field-selectable 12VDC or 24VDC output means one SKU accommodates mixed legacy and modern device ecosystems without dual inventory
6A per Unit Capacity: Sufficient for 4–6 IP cameras or 12–15 access control readers on a single supply; multiunit stacking scales to enterprise loads
Battery Integration: Native backup terminals simplify UPS wiring; no external converter racks needed for small-to-medium critical device sets

Deployment Considerations:

Confirm total load amperage across all connected devices before specifying; MAXFIT3FE is single-unit, not a full cabinet. Stack multiple units for higher capacity systems.
Plan voltage selection early in project scope. Mixed 12V and 24V loads require separate supply units, increasing enclosure real estate. Standardize voltage where possible.
Battery backup sizing must be calculated independently. Specify sealed lead-acid or lithium backup capacity based on hold-up time requirements for your critical devices.

For integrators managing growth accounts or phased security expansions, the MAXFIT3FE's modular footprint and dual-voltage capability reduce engineering friction and future retrofit costs. Pair with Altronix supervision modules to achieve visibility parity with larger centralized supplies.