Altronix MAXIMAL3RH 8-Output Access Power Controller

Altronix MAXIMAL3RH Access Power Controller with Power Supply and Charger

Overview

The Altronix MAXIMAL3RH is a 2U rack-mount access control power controller designed for professional security integrators and access control system deployments. This unit combines a regulated power supply with integrated battery charger functionality, eliminating the need for separate components in access control installations. The MAXIMAL3RH delivers selectable 12VDC or 24VDC output with a maximum current rating of 6A at 12VDC, 4A at 12VDC, or 3A at 24VDC, making it suitable for powering multiple access control devices, electric locks, badge readers, and relay-controlled peripherals from a single 115VAC input source.

With 8 independently fused relay outputs, the MAXIMAL3RH provides flexible control and load isolation for door strikes, auxiliary locks, and integrated alarm circuits. Built-in battery backup ensures continued operation during AC power loss, while integrated supervision monitoring—including AC fail detection, low battery alerts, and battery presence monitoring—provides system-level intelligence without requiring external monitoring hardware.

Key Features

• Dual Output Voltage: Selectable 12VDC or 24VDC operation accommodates both legacy and modern access control equipment within a single installation
• 8 Fused Relay Outputs: Independently fused outputs enable isolated control of multiple loads with individual circuit protection and fail-safe isolation
• High-Current Output: 6A maximum current at 12VDC and 3A at 24VDC supports multi-door access control systems and high-load peripherals without auxiliary power distribution
• Integrated Battery Charger: Built-in charger eliminates external battery management equipment, reducing panel space and component count
• Battery Backup: Rechargeable battery support ensures access control and emergency unlocking capability during extended AC power outages
• Fire Alarm Disconnect: Integrated fire alarm disconnect capability supports code-required emergency access override without additional relay modules
• AC Fail Supervision: Automatic detection of input power loss triggers alerts for immediate awareness of power events
• Low Battery Supervision: Monitored battery voltage ensures responders know when backup capacity is degrading before complete discharge
• Battery Presence Monitoring: System supervision detects missing or failed backup batteries before an actual power event
• UL Listed: Factory-tested and certified for safety and code compliance in access control and security applications
• 2U Rack-Mount Form Factor: Standard 19-inch rack mounting integrates seamlessly into existing security system infrastructure and server room deployments
• 115VAC Input: Standard North American AC power eliminates need for special power infrastructure in most commercial installations

Integration & Compatibility

The MAXIMAL3RH is designed for integration with hardwired access control systems, including card readers, electric strike assemblies, magnetic locks, and alarm interface circuits. The selectable output voltage accommodates both 12VDC and 24VDC device ecosystems, reducing the need for multiple power supplies in mixed-equipment environments. The integrated battery backup and charger eliminate separate UPS and charging circuit requirements, simplifying system design and reducing overall panel footprint. Relay outputs provide dry contact control suitable for interfacing with external fire alarm panels, security system control modules, and emergency lighting circuits.

Eden Phillips

I have evaluated the Altronix MAXIMAL3RH in multiple access control panel retrofit projects, and it delivers solid reliability for mid-to-large door count deployments. The integrated charger and battery supervision features reduce recurring on-site troubleshooting calls significantly, and the dual voltage selection handles legacy installations without requiring DC-DC converters.

Technical Highlights:

• Output Current Capacity: 6A at 12VDC and 3A at 24VDC provides sufficient headroom for 4–8 door systems with electric strikes and readers on shared distribution
• Fused Relay Protection: 8 independent fused outputs isolate load failures and prevent cascade failures across the access control network
• Supervision Intelligence: AC fail, low battery, and battery presence monitoring integrate with most access control panels via dry contact or serial interfaces
• Fire Alarm Disconnect: Built-in capability meets life safety code requirements without panel rewiring or additional relay modules

Deployment Considerations:

• Verify battery capacity with system integrator before installation—the charger supports standard sealed lead-acid and gel-cell batteries; confirm ampere-hour rating matches your backup duration requirement
• Confirm fire alarm disconnect wiring with local AHJ and access control panel documentation to ensure code compliance and proper emergency unlock timing
• Plan 115VAC branch circuit capacity; 6A output capacity does not require a dedicated circuit but should be on a stable, uninterruptible AC feed
• Test supervision monitoring during system commissioning to verify AC fail, low battery, and presence signals reach your control panel or monitoring station correctly

The MAXIMAL3RH is a time-proven platform in access control and integrates well with standard hardwired system architectures. It reduces component complexity, eases serviceability, and provides the monitoring depth your operation needs to track power events and prevent unplanned lockouts.