Altronix MAXIMAL7D Access Power Controller with Integrated Charger

Overview

The Altronix MAXIMAL7D is a dedicated access control power management solution engineered for mid-to-large security installations requiring reliable 24VDC distribution with integrated battery charging and supervised output management. This unit delivers 24VDC @ 9A maximum output capacity across 16 individually protected PTC (Polymeric Positive Temperature Coefficient) relay outputs, eliminating single-point-of-failure risk in access control circuits. The MAXIMAL7D accepts 115VAC input power and includes an onboard charger for battery backup, making it suitable for installations where sustained power delivery and emergency access provisions are critical operational requirements.

Key Features

• 16 PTC Class 2 Relay Outputs: Each output is protected by individual PTC devices that automatically interrupt current flow during overcurrent or short-circuit conditions, eliminating nuisance fuse replacement and reducing field service costs.
• 24VDC @ 9A Output Capacity: Supplies sufficient amperage for multiple door strikes, magnetic locks, and access control field devices in a single installation.
• 115VAC Input Supply: Standard North American mains voltage compatibility for straightforward integration into existing electrical infrastructure.
• Integrated Battery Charger: Factory-installed battery charging circuit enables seamless UPS functionality when paired with external backup batteries, maintaining access control operation during mains power loss.
• BC800 Enclosure: Compact, wall-mountable steel enclosure suitable for electrical closets, communications rooms, and mechanical spaces.
• Class 2 Safety Rating: Outputs meet Class 2 power source requirements, enabling direct connection to access control sensors and lock devices without additional isolation transformers.
• Individual Output Control: 16 separate relay outputs allow granular control and independent supervision of each access point or device circuit.
• Field-Proven Design: Established platform in institutional, commercial, and multi-tenant access control applications.

Typical Applications

The MAXIMAL7D serves as the primary power distribution node in medium-complexity access control systems, particularly those deployed across:

• Multi-tenant office buildings and Class A commercial real estate
• Educational institutions with centralized access management
• Healthcare facilities requiring continuous access during emergencies
• Parking structures and secure perimeter gateways
• Data centers and server room access control

Integration & Compatibility

The MAXIMAL7D integrates directly into access control systems that operate on 24VDC Class 2 protocol. Compatible with industry-standard door strike controllers, magnetic lock drivers, credential readers, and access management platforms that accept supervised relay closure signals. The PTC output protection is compatible with all major access control manufacturers' field device specifications, reducing integration complexity during system design and commissioning.

When paired with a compatible backup battery and charging regulator, the unit enables battery-backed access operation, ensuring that electric locks remain functional during power disruptions. This configuration is particularly valuable in facilities where egress requirements mandate continuous access availability.

Power Management & Reliability

Each of the 16 relay outputs in the MAXIMAL7D is independently fused through PTC protection, preventing a single overload condition from disabling the entire system. This architecture is substantially more reliable than shared bus designs, as localized circuit faults remain isolated to individual outputs. The onboard charger maintains battery float voltage automatically, ensuring the backup battery remains ready for seamless takeover when AC mains power fails.

Ted Perry

Perspective based on aggregated IP Security Depot and affiliated engineering team experience.

I've specified the MAXIMAL7D on a number of access control refresh projects, and it remains a reliable centerpiece for mid-scale distributed access. The unit's 16 independently protected outputs and 24VDC @ 9A capacity handle most common door control scenarios without requiring secondary distribution panels, which simplifies both installation and future maintenance.

Technical Highlights:

• Output Protection Architecture: PTC relay outputs eliminate the need for field-replaceable fuses on each circuit, reducing downtime and support calls during circuit overload events.
• Battery Charging Integration: The onboard charger supports seamless UPS operation when external backup batteries are installed, critical for facilities with egress continuity mandates.
• Adequate Amperage for Dense Deployments: The 9A capacity at 24VDC covers most multi-door installations without requiring parallel units, keeping electrical design straightforward.

Deployment Considerations:

• Verify your access control system operates on 24VDC Class 2 protocol before specification; some legacy platforms may require separate voltage converters upstream.
• Plan battery backup sizing based on expected hold time; the onboard charger supports external batteries but does not include them, so capacity is determined by your selection.
• Route the 16 relay outputs to individual door strikes or lock circuits to maximize the isolation benefit of the PTC protection scheme; bundling multiple devices on a single output defeats the fault isolation advantage.

For medium-scale access control systems in commercial or institutional settings, the MAXIMAL7D delivers straightforward, field-proven power management with meaningful reliability gains over shared-bus architectures. It's a solid choice for integrators who prioritize reduced service calls and simplified circuit diagnostics.