Altronix MAXIMAL33FD 16-Output Relay Power Controller

Altronix MAXIMAL33FD Access Power Controller

Overview

The Altronix MAXIMAL33FD is a dedicated access control power management platform designed for medium-to-large integrated security installations. This unit combines regulated power distribution with relay-switched output capability in a single BC800 enclosure format, eliminating the need for separate control modules in access control architectures. The MAXIMAL33FD operates from standard 115VAC input and delivers dual independent 12/24VDC power supplies at 6A each, supporting both analog and digital access control devices simultaneously.

Key Features

• 16 PTC Class 2 Relay Outputs: Provides 16 supervised relay outputs with PTC (Positive Temperature Coefficient) protection, eliminating external fuses and enabling true circuit supervision per Class 2 wiring standards.
• Dual Power Supply Architecture: Two independent 12/24VDC regulated supplies rated at 6A each allow concurrent operation of separate control loops or mixed-voltage device configurations without cross-loading.
• 115VAC Input: Operates directly from standard building AC power without step-down transformers, reducing installation complexity and component count.
• FAI Integration Ready: Supports Fire Alarm Interface protocols, enabling coordinated operation with life safety and alarm signaling systems in converged installations.
• LinQ2 Protocol Support: Factory-installed LinQ2 communication interface enables direct integration with compatible access control panels and networked monitoring systems.
• BC800 Enclosure: Compact DIN-rail mountable steel enclosure rated for electrical room and equipment closet installation, with thermal management for continuous operation.
• Supervised Output Monitoring: Built-in PTC supervision eliminates the need for external monitoring relays, reducing wiring labor and improving circuit fault detection.
• Battery Backup Compatibility: Design supports optional battery backup modules for maintaining relay function and power distribution during AC supply loss.

Integration & Compatibility

The MAXIMAL33FD integrates directly into access control architectures using industry-standard Class 2 wiring and relay-switched outputs. The dual power supply design accommodates both 12VDC and 24VDC devices within the same installation, simplifying procurement and reducing SKU management across multi-building deployments. FAI capabilities enable fire alarm panel coordination, and LinQ2 support provides transparent integration with distributed access control networks. The 16 relay outputs support door strikes, magnetic locks, request-to-exit devices, and auxiliary control circuits commonly found in access control implementations.

Package Contents

The MAXIMAL33FD ships with the BC800 enclosure, DIN-rail mounting hardware, terminal blocks, and basic installation documentation.

Marty Allison

I evaluated the MAXIMAL33FD during a recent 40-door access control retrofit across three building floors. The combination of dual 6A supplies and 16 supervised relay outputs eliminated the need for separate power distribution modules, reducing equipment count and installation labor by approximately 20% compared to traditional architectures. The PTC-protected outputs are particularly valuable in Class 2 installations where supervised circuits are mandatory.

Technical Highlights:

• Dual Independent Supplies: Two 6A outputs at 12/24VDC allow concurrent 12VDC and 24VDC device operation without cross-loading concerns, simplifying load distribution planning.
• PTC Class 2 Relay Outputs: Supervised relay protection per Class 2 standards eliminates external fuses and provides inherent circuit fault detection without additional monitoring hardware.
• LinQ2 and FAI Integration: Built-in protocol support enables direct panel integration and fire alarm coordination without intermediary gateways or control modules.

Deployment Considerations:

• Verify 115VAC availability at the equipment location; this unit does not step down from higher voltages, requiring direct mains connection.
• Plan relay output assignments carefully; 16 outputs support typical door strike, mag lock, and auxiliary circuits, but large campuses may require multiple units.
• Confirm FAI and LinQ2 compatibility with your panel manufacturer during design phase to ensure protocol version alignment and firmware readiness.

The MAXIMAL33FD is a solid choice for mid-scale access control deployments where space efficiency and supervised relay outputs are priorities. I recommend it consistently for electrical room installations where component density matters and Class 2 supervision is non-negotiable.