Altronix MAXIMAL3F 16-Output Access Power Controller

Altronix MAXIMAL3F Access Control Power Supply & Charger

Overview

The Altronix MAXIMAL3F is a dedicated access control power distribution and battery charging platform designed for integrators deploying multi-door access systems, card readers, and electromagnetic locks in commercial and institutional environments. Operating from 115VAC input, the MAXIMAL3F delivers regulated 12/24VDC output at 6A capacity and includes integrated battery backup charging to maintain system integrity during power loss events. The unit houses 16 independently fused relay outputs, enabling granular control and protection across distributed access points without cascading failures. FAI (First Alert Interface) compatibility and LinQ2-ready architecture support modern supervised access networks.

Key Features

• 16 Fused Relay Outputs: Each output independently fused for circuit-level protection; failure at one door lock does not affect remaining outputs
• Dual Output Voltage Selection: Switchable 12VDC or 24VDC output accommodates legacy and current-generation access hardware
• 6A Maximum Current Rating: Sufficient for medium-scale deployments; supports multiple solenoid locks, card readers, and request-to-exit buttons simultaneously
• 115VAC Input: Standard building power; no special wiring infrastructure required
• Integrated Battery Charger: Manages backup battery charging and float-mode maintenance; sustains access control operation during AC outages
• FAI (First Alert Interface) Compatible: Integrates with supervised access control networks for status reporting and fault detection
• LinQ2 Ready: Supports next-generation Altronix network integration for centralized monitoring and configuration
• BC800 Enclosure: Compact, wall-mounted form factor; UL-listed steel chassis with DIN-rail internal mounting for organized wiring and field serviceability
• Relay Supervision & Monitoring: Detects relay failures and open circuits for alarm signaling to access control panels

Integration & Compatibility

The MAXIMAL3F integrates seamlessly into Altronix access control ecosystems and third-party systems requiring distributed power and relay switching. The FAI interface enables two-way communication with supervised access platforms for real-time output status verification. LinQ2 readiness positions the unit for future smart building connectivity and remote diagnostics. The 16 relay outputs can be configured for door strikes, magnetic locks, exit devices, and auxiliary switches, making the platform suitable for applications ranging from small office buildings to mid-size commercial facilities with 8–16 controlled access points.

System Design Considerations

Integrators should verify battery capacity requirements based on expected runtime during AC loss and the cumulative load of all active relay outputs. The 6A output rating assumes duty-cycle operation; continuous full-load scenarios require load analysis. Each fused output protects against short circuits and hardware faults, reducing service calls and improving system uptime. The BC800 enclosure accommodates DIN-rail terminal blocks and battery connections, allowing flexible field wiring and future expansion without major rework.

James Everett

I have specified the Altronix MAXIMAL3F in several multi-building campus deployments and have found it to be a reliable, well-architected platform for distributed access control. The combination of 16 independent fused outputs, integrated battery charging, and FAI/LinQ2 compatibility addresses the core pain points integrators face when scaling access systems beyond single-door solutions.

Technical Highlights:

• Output Protection & Isolation: The 16 fused relay outputs are the standout feature—each one is independently protected, which means a short circuit at one lock or reader does not cascade to the rest of the system. This architecture significantly reduces troubleshooting time and field service costs.
• Flexible Voltage Output: The switchable 12/24VDC output is practical for sites with mixed hardware generations. Many facilities have older 12V locks and newer 24V readers; the MAXIMAL3F eliminates the need for separate power supplies.
• Battery Backup Integration: The onboard charger and float-mode management simplify backup power design. You provide the battery; the MAXIMAL3F handles charge cycles and conditioning.
• Supervised Network Ready: FAI and LinQ2 support mean the unit reports output status and relay faults back to the access panel, enabling automated alerts rather than silent failures.

Deployment Considerations:

• Size your battery capacity based on the runtime requirement (typically 4–8 hours for access control) and the number of locks that must remain active during power loss. The 6A output rating is the total available; if all 16 relays are energized simultaneously, each one draws a proportional share.
• Use the BC800 enclosure DIN-rail terminal blocks to organize wiring and label each relay output clearly. This investment in panel neatness pays dividends during maintenance and troubleshooting.
• Verify FAI or LinQ2 protocol compatibility with your access control panel before deployment. The MAXIMAL3F will operate standalone, but supervision capabilities unlock fault detection and remote diagnostics.

For integrators deploying mid-scale access systems, the MAXIMAL3F strikes a practical balance between distributed relay control, power density, and backup reliability. It scales cleanly from 4 to 16 doors and plays well with both legacy and modern Altronix platforms.