Altronix MAXIMAL3RHV Access Power Controller with Integrated Power Supply

Overview

The Altronix MAXIMAL3RHV is a 2U rack-mount access power controller designed for security integrators and IT managers deploying distributed access control infrastructure. This unit combines a regulated power supply and charger in a single chassis, delivering 12VDC and 24VDC output at up to 6A @ 12VDC to support eight independently fused relay outputs. Built for mission-critical applications, the MAXIMAL3RHV includes integrated battery backup, AC fail supervision, and fire alarm disconnect capability—essential features for compliance and system resilience in access control and security systems.

Key Features

• Dual Output Voltage: 12VDC @ 6A or 24VDC @ 3A, switchable to match downstream device requirements
• Eight Fused Relay Outputs: Independent fused outputs provide isolation and overcurrent protection for each controlled circuit
• Integrated Power Supply & Charger: 220VAC input with built-in charging logic for seamless battery backup operation
• Battery Backup Ready: Supports rechargeable battery installation for continued operation during AC power loss
• AC Fail Supervision: Automatic detection and alarm of utility power failure
• Low Battery Supervision: Monitors battery voltage and alerts when reserve capacity is depleted
• Battery Presence Supervision: Confirms battery is physically present and connected before system startup
• Fire Alarm Disconnect: Integrates fire alarm interface to gracefully disconnect controlled loads during emergency events
• 2U Rack Form Factor: Compact vertical mounting for data center, server room, and IDF deployment
• UL Listed: Meets North American safety standards for power distribution and access control applications

Integration & Compatibility

The MAXIMAL3RHV integrates into access control systems, door release controllers, and distributed security device networks requiring regulated 12VDC or 24VDC power with supervised relay switching. Eight independent fused outputs enable control of multiple circuits—including electric strikes, magnetic locks, door position sensors, and auxiliary devices—from a single power source. Fire alarm disconnect functionality allows integration with building fire safety systems, ensuring orderly power removal during emergency conditions. Battery backup and AC fail supervision provide the redundancy necessary for life-safety and access control compliance in critical infrastructure deployments.

Ted Perry

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

I've evaluated the MAXIMAL3RHV during multiple access control deployments, and this controller delivers the supervision and reliability required in mission-critical door control systems. The combination of 8 independently fused relay outputs with integrated battery backup and fire alarm disconnect makes it a robust choice for centralizing power distribution across distributed access points.

Technical Highlights:

• Dual Voltage Output: Switchable 12VDC @ 6A or 24VDC @ 3A accommodates both legacy and modern lock hardware without requiring separate power supplies
• Comprehensive Supervision: AC fail, low battery, and battery presence detection eliminate silent failures and ensure system visibility before power is needed
• Fire Safety Integration: Fire alarm disconnect output allows coordinated emergency response—critical for ADA and life-safety compliance

Deployment Considerations:

• Verify downstream device voltage and current requirements before configuration; the MAXIMAL3RHV supports both 12VDC and 24VDC but not simultaneously on all outputs
• Plan battery capacity based on expected hold-up time for all eight relay loads during power loss; integrate supervision signals into building management or security monitoring systems
• Use the fused relay outputs to distribute power across multiple access points rather than daisy-chaining from a single output—this maximizes fault isolation and simplifies troubleshooting

The MAXIMAL3RHV is a dependable centerpiece for access control power distribution in facilities where supervision, redundancy, and emergency integration are non-negotiable. Its 2U form factor and rack-mount design make it fit seamlessly into network closets and equipment rooms.