Altronix MAXIMAL33R 2U Dual 12/24VDC 6A Access Controller

Altronix MAXIMAL33R Access Power Controller

Overview

The Altronix MAXIMAL33R is a ruggedized 2U access power controller and power supply platform designed for security integrators and installers managing multi-output power distribution in access control systems. Built with integrated power supply and charger modules, the MAXIMAL33R delivers redundant 12/24VDC power rails rated at 6 amps each, supporting 16 independently fused relay outputs. This configuration enables integrators to control and supervise multiple access devices—electric strikes, mag locks, door operators, and auxiliary systems—from a single, centralized rack-mount enclosure while maintaining battery backup capability for emergency egress scenarios.

Key Features

• Dual 12/24VDC regulated power supplies, 6 amps each channel
• 16 independently fused relay outputs for granular load switching and protection
• 115VAC input (U.S. standard mains)
• Integrated trickle charger for auxiliary battery backup
• 2U rack-mount form factor for data center and utility closet integration
• Screw-terminal input/output connections for field wiring
• Compact footprint optimized for access control system architecture
• Distributed power delivery supporting lock, strike, and door operator circuits
• Built-in power supply redundancy for critical circuit isolation
• Supports supervised relay circuits for real-time device status monitoring

Technical Specifications

The MAXIMAL33R operates on standard 115VAC input and delivers dual isolated 12VDC and 24VDC output rails, each capable of sourcing 6 amps of continuous current. This dual-rail design allows integrators to mix and match device voltage requirements without external conversion modules. The 16 fused relay outputs provide individual circuit protection and enable independent control of access devices across a facility. Each relay output is individually fused, preventing a single device fault from cascading across the entire power distribution tree.

The unit features a dedicated trickle charger circuit for maintaining auxiliary backup battery voltage during normal operation, ensuring that emergency egress and door unlock functions remain operational during AC power loss. The MAXIMAL33R integrates input protection, internal current limiting, and thermal management to operate reliably in utility closets and other non-climate-controlled environments typical of access control deployments.

Integration & Compatibility

The MAXIMAL33R is compatible with standard access control panels and door controllers that require multi-output power distribution with relay supervision. The dual voltage rails accommodate both 12VDC and 24VDC devices in a single system, reducing Bill of Materials complexity for mixed-voltage environments. Screw-terminal connections support both solid and stranded field wiring, and the 2U enclosure mounts directly into standard 19-inch server racks or wall-mount brackets.

Package Contents

Each MAXIMAL33R ships as a complete power controller assembly with integrated power supply and charger. Field installation requires only AC mains connection, battery backup connection (if applicable), and controlled load wiring to the relay terminals.

Marty Allison

I've specified the Altronix MAXIMAL33R in numerous mid-size access control rollouts, and it delivers solid engineering for integrators managing multiple door circuits. The dual 6-amp rails give you genuine flexibility when mixing 12V and 24V devices on the same platform, and the 16 individually fused outputs keep fault isolation clean and straightforward.

Technical Highlights:

• Dual isolated power rails: Independent 12VDC and 24VDC outputs eliminate the need for external DC-DC converters in mixed-voltage deployments.
• 16 fused relay outputs: Each output is individually protected, preventing a single short or over-current condition from disabling unrelated circuits.
• Integrated trickle charger: Built-in battery charging means you don't need a separate charger module for backup power, reducing BOM and rack space.
• 2U form factor: Fits standard 19-inch racks, allowing consolidation with network switches and other infrastructure in utility closets.

Deployment Considerations:

• Plan your battery backup capacity upfront—the unit can charge auxiliary batteries, but you must specify and install the battery pack separately based on your egress runtime requirements (typically 10–30 minutes for emergency unlock).
• Coordinate AC power feeding the MAXIMAL33R with your facility's UPS or generator circuit—this device provides the last-mile power distribution, not the top-level backup supply.

For integrators running 4–16 access points from a single location, the MAXIMAL33R is a proven, no-surprises solution. The relay output design plays well with legacy and modern panels alike, and Altronix's support is solid if you hit any field issues.