Altronix MAXIMAL77FD Dual 24VDC Access Power Controller

Altronix MAXIMAL77FD Access Power Controller

Overview

The Altronix MAXIMAL77FD is a comprehensive access control power management solution designed for security integrators and system installers who require reliable, integrated power distribution and relay control in a single enclosure. Built into a BC800 enclosure, this controller combines dual 24VDC power supplies with extensive relay output capacity, making it suitable for mid-to-large access control installations where multiple door locks, magnetic locks, and auxiliary devices require coordinated power management and supervision.

The MAXIMAL77FD delivers two independent 24VDC power supplies rated at 9.7 amperes each, providing redundancy and load distribution across access control door readers, lock actuators, and request-to-exit devices. With 16 PTC Class 2 relay outputs, the controller enables discrete control of multiple access points and auxiliary equipment from a centralized platform.

Key Features

• Dual 24VDC Power Supplies: Two independent 24VDC outputs, 9.7A each, for load balancing and system redundancy
• 16 PTC Class 2 Relay Outputs: Simultaneous control of multiple locks, doors, and auxiliary devices
• 115VAC Input: Standard North American AC utility input for reliable primary power
• BC800 Enclosure: Compact, DIN-rail compatible form factor for standard electrical cabinets and control rooms
• FAI Ready: Compatible with Fire Alarm Interface protocols for integrated fire safety coordination
• LinQ2 Ready: Supports Altronix LinQ2 supervision and communication protocol for remote monitoring and control
• PTC Relay Protection: Positive Temperature Coefficient protection on relay outputs reduces thermal stress and extends device lifespan
• Class 2 Certification: Meets Class 2 power distribution standards for low-voltage safety compliance

Integration & Compatibility

The MAXIMAL77FD is engineered to integrate seamlessly into access control ecosystems. FAI readiness ensures coordination with fire alarm systems—critical for life safety applications where door release sequences must synchronize with emergency protocols. LinQ2 compatibility enables remote supervision, status monitoring, and control via networked management platforms, allowing security operations centers to monitor power supply health, relay activation, and system faults without on-site intervention.

The controller's 16 relay outputs support both lock control and auxiliary device management. Typical integrations include synchronized control of multiple magnetic locks, electric strikes, request-to-exit buttons, turnstile gates, and barrier gates. The dual power supply design allows segregation of critical loads (e.g., life safety locks on separate supplies) from non-critical auxiliary equipment, enhancing system resilience.

Installation teams benefit from the compact BC800 form factor, which fits standard 19-inch server racks, wall-mounted electrical enclosures, and distributed cabinet deployments. The 115VAC input requirement matches standard facility power distribution, eliminating specialized step-down transformers in most installations.

Eden Phillips

The Altronix MAXIMAL77FD represents a practical choice for integrators managing mid-scale access control deployments. During our evaluation, the dual 24VDC, 9.7A supply design proved valuable in projects where load distribution and supply redundancy prevented single points of failure in critical door control systems.

Technical Highlights:

• Dual Power Supply Redundancy: Two independent 24VDC outputs allow load segregation between life safety and convenience access, reducing risk of cascading failures
• 16 Relay Outputs: PTC Class 2 relays provide sufficient switching capacity for multi-door installations without additional relay modules in many scenarios
• LinQ2 Integration: Enables remote monitoring of power supply status, voltage levels, and relay activation states through networked supervision
• FAI Compatibility: Fire alarm interface readiness simplifies integration with life safety systems for coordinated door release during emergency events

Deployment Considerations:

• Verify load calculations across 16 relays and dual supplies—PTC protection may limit peak current draw on individual outputs in high-utilization scenarios
• Plan cabinet cooling if deploying in enclosed spaces; dual power supplies and 16 active relays generate measurable thermal load during sustained operation
• Test LinQ2 communication integration early in project planning to ensure compatibility with your access control platform's monitoring and alerting workflows

For integrators building resilient access control architectures, the MAXIMAL77FD delivers solid functional density without overcomplicating installation or troubleshooting workflows.