Altronix MAXIMAL55F 16-Output Fused Relay Controller

Altronix MAXIMAL55F Access Power Controller

Overview

The Altronix MAXIMAL55F is a 16-output fused relay access power controller engineered for security integrators managing multi-door access control installations. This unit combines dual regulated 12VDC power supplies rated at 9.5A each with integrated relay switching capability, supporting both FAI and LinQ2 platforms for simplified system integration. Built into a BC800 enclosure, the MAXIMAL55F delivers the distributed power management required for large-scale access installations where individual circuit control and power isolation are critical operational requirements.

Key Features

• Dual 12VDC Power Supplies: Two independent 9.5A regulated outputs provide redundancy and load distribution across access control devices
• 16 Fused Relay Outputs: Individual relay-controlled circuits with integrated fusing for equipment protection and selective circuit isolation
• FAI Platform Support: Direct compatibility with Altronix FAI (Flexible Access Integration) systems for streamlined configuration
• LinQ2 Ready: Full support for LinQ2 management and monitoring, enabling remote supervision and status reporting
• 115VAC Input: Standard North American main power connection with standard AC supply requirements
• BC800 Enclosure: Compact DIN-rail mountable cabinet design optimized for controlled environments and secure installations
• Integrated Power Supply/Charger: Built-in charging circuitry supports battery backup integration for emergency access scenarios

Integration & Compatibility

The MAXIMAL55F is factory-configured for FAI and LinQ2 environments, eliminating integration complexity for system integrators. The dual 9.5A outputs accommodate load balancing across multiple access points, while the 16 fused relay outputs provide granular circuit control—ideal for door strikes, electric locks, REX buttons, and auxiliary access control devices. The included power supply/charger functionality enables users to integrate battery backup without additional external chargers, reducing cabinet footprint and simplifying wiring.

The BC800 enclosure provides physical security and thermal management in equipment rooms and secure mounting locations. The integration of both power supply and relay switching in a single unit reduces component count and installation labor, making the MAXIMAL55F a cost-effective choice for mid-to-large access control deployments requiring distributed power management.

James Everett

The Altronix MAXIMAL55F addresses a common integration challenge: delivering regulated 12VDC power with relay-switched outputs across multiple access control zones. During planning for a 12-door access deployment, we found the dual 9.5A supplies and 16 relay outputs eliminated the need for separate power distribution modules, reducing both hardware costs and installation time.

Technical Highlights:

• Dual Independent 12VDC Rails: Each 9.5A supply operates independently, allowing load balancing and selective power management across access zones without shared fusing
• Relay-Based Circuit Control: 16 individual fused relay outputs enable per-device power control, emergency cutoff, and selective device isolation without affecting adjacent circuits
• FAI & LinQ2 Native Support: MAXIMAL55F arrives configured for both platforms, eliminating field-level firmware updates and reducing deployment complexity

Deployment Considerations:

• Plan relay output allocation early—map door strikes, locks, and auxiliary devices to specific relay circuits to maximize troubleshooting isolation and future scalability
• The integrated power supply/charger supports battery backup; confirm backup runtime requirements and battery capacity during initial system design to avoid undersized UPS integration

For integrators managing multi-building or multi-floor access control, the MAXIMAL55F's compact footprint and dual-rail design deliver genuine operational advantages. The fused relay approach simplifies diagnosis of device failures and provides protection against short-circuit conditions that could otherwise cascade across shared power buses.