Altronix MAXIMAL33FDV Dual 12/24VDC 6A Access Controller

Altronix MAXIMAL33FDV Access Power Controller

Overview

The Altronix MAXIMAL33FDV is a comprehensive access control power distribution and backup solution designed for mid-scale security installations. This dual-output power controller delivers simultaneous 12VDC and 24VDC power at 6 amperes per rail, making it suitable for mixed-voltage access control architectures. The unit integrates power supply and battery charging in a single chassis with 16 programmable PTC Class 2 relay outputs, enabling centralized power management and load protection across door locks, credential readers, and auxiliary control devices. The MAXIMAL33FDV supports FAI (Firmware Authentication Interface) protocols and is LinQ2 ready, ensuring compatibility with modern access control platforms and future firmware updates.

Key Features

• Dual Power Rails: Independent 12VDC @ 6A and 24VDC @ 6A outputs allow simultaneous support for both voltage-class devices within a single controller
• 16 PTC Relay Outputs: Programmable Class 2 relay outputs with overcurrent protection enable flexible load switching and device control without external relays
• 220VAC Input: Operates from standard international AC mains supply, suitable for global installations
• Battery Backup Capability: Integrated charger supports connected battery systems for power failure continuity and emergency access scenarios
• FAI Protocol Support: Firmware Authentication Interface compatibility ensures secure firmware deployment and vendor lock-in protection
• LinQ2 Ready: Pre-enabled for next-generation access control integration and management platform connectivity
• BC800 Enclosure: Ruggedized access control-grade enclosure rated for wall or DIN rail mounting in secured equipment closets and server rooms
• PTC Overcurrent Protection: Positive Temperature Coefficient (PTC) thermal protection on each relay output prevents damage from short circuits and sustained overload conditions

Integration & Compatibility

The MAXIMAL33FDV integrates seamlessly into access control systems requiring multi-voltage power distribution. The FAI protocol support enables firmware updates and security patches through authorized manufacturer channels, protecting system integrity. LinQ2 readiness positions the controller for integration with cloud-connected access management platforms and remote monitoring solutions. The 16 relay outputs provide sufficient control capacity for door strikes, magnetic locks, request-to-exit sensors, and supplementary devices typical in small-to-medium enterprise deployments. Battery backup functionality supports both momentary power loss bridging and extended-duration emergency access protocols depending on connected battery capacity.

Package Contents & Operational Context

The MAXIMAL33FDV arrives as a fully assembled controller within the BC800 enclosure, ready for integration into access control cabinets. Dual output rails simplify wiring in installations with mixed 12V and 24V device populations, eliminating the need for separate power supplies and reducing cabinet footprint. The integrated charger simplifies backup power architecture by eliminating the requirement for standalone battery charging modules. Proper load balancing across the 16 relay outputs ensures optimal operational life and minimizes risk of single-point failures affecting multiple access points.

Marty Allison

I've evaluated the Altronix MAXIMAL33FDV during the design phase of several mid-sized access control rollouts, and it addresses a real pain point: managing dual-voltage power distribution without multiple enclosures. The dual 6A rails handle the typical mixed environment of 24V door strikes and 12V credential readers without forcing customers into voltage-matching workarounds.

Technical Highlights:

• Dual Independent Rails: 12VDC and 24VDC at 6A each eliminate the need for separate power supplies in mixed-voltage designs
• 16 PTC Relay Outputs: Class 2 rated with per-output overcurrent protection reduce cabinet clutter and external relay costs
• FAI & LinQ2: Future-proofs the controller against both firmware security updates and next-generation platform migrations
• Battery Integration: Built-in charger simplifies UPS architecture and reduces backup power circuit complexity

Deployment Considerations:

• Verify 220VAC availability at the installation site; step-down transformers or UPS systems with AC conditioning may be required in some regions
• Load balance across the 16 outputs according to the access control panel's recommended device distribution to avoid thermal stress on individual relay channels
• Plan battery capacity early—the MAXIMAL33FDV's charger is sized for standard lead-acid or AGM modules; confirm capacity requirements against your emergency access duration policy

The MAXIMAL33FDV is the logical choice for integrators who need to simplify power distribution without sacrificing flexibility. The combination of dual rails, relay density, and firmware-ready architecture makes it a solid foundation for 50–150 door installations where mixed voltages and remote platform connectivity are baseline requirements.