Altronix MAXIMAL11FD Access Control Power Controller
Overview
The Altronix MAXIMAL11FD is a versatile access control power distribution and battery backup solution engineered for mid-to-large deployments requiring multiple simultaneous power feeds and relay outputs. This controller integrates dual regulated power supplies with 16 individually supervised relay outputs, providing the core distribution infrastructure for integrated access, alarm, and auxiliary control circuits. The MAXIMAL11FD operates from 115VAC input and delivers selectable 12VDC or 24VDC output, with each supply capable of delivering 3.5 amps of continuous current.
Key Features
- Dual 12/24VDC Power Supplies: Two independent regulated power supply and charger modules rated at 3.5 amps each, allowing simultaneous operation at different voltage levels or redundant output paths for critical circuits
- 16 PTC Class 2 Relay Outputs: Individual PTC (Positive Temperature Coefficient) protected relay outputs prevent overcurrent damage and eliminate the need for external fuses on each circuit
- FAI Certification: Fire Alarm Interface certification enables integration with fire detection systems and ensures code-compliant auxiliary signaling
- LinQ2 Ready: Pre-configured for Altronix LinQ2 network monitoring and management, supporting remote diagnostics and performance monitoring
- Integrated Battery Backup: Onboard chargers support external backup battery connection, maintaining critical access control functions during power loss
- 115VAC Input: Standard North American AC input eliminates need for additional transformers in typical facility installations
- BC800 Enclosure: Compact cabinet-grade steel enclosure with DIN rail mounting provisions for organized wiring and modular component integration
- Individual Output Supervision: Each relay output can be monitored for open or short circuit conditions, supporting real-time fault detection and troubleshooting
- Class 2 Wiring Compliance: All outputs meet Class 2 low-voltage circuit standards for use in secure facilities and installations requiring code adherence
Integration & Compatibility
The MAXIMAL11FD integrates seamlessly into larger Altronix access control ecosystems through LinQ2 network connectivity, enabling centralized power supply monitoring alongside door controllers and readers. The dual-supply architecture allows integrators to segregate load types—dedicating one 3.5A supply to access readers and another to door locks or auxiliary systems—without overloading a single output. The FAI certification permits direct connection to fire panel auxiliary inputs, eliminating separate relay modules for emergency system integration. The BC800 enclosure accommodates standard DIN rail mounted components, supporting modular builds that scale with project scope.
Technical Architecture
Each of the 16 relay outputs operates as a Class 2 device with independent PTC protection, meaning overcurrent conditions automatically degrade performance rather than fail catastrophically. This design reduces field troubleshooting time and prevents cascading failures from a single shorted load. The dual 3.5A supplies can be deployed in parallel for 7A redundancy, or in independent operation supporting two separate voltage zones within a single facility. Battery backup chargers maintain float and charge voltage automatically, extending battery life and eliminating manual equalizing maintenance. The MAXIMAL11FD fits within standard 19-inch or open DIN rail cabinets, making it compatible with both legacy and modern facility layouts.
Jerry TildsenPerspective based on aggregated IP Security Depot and affiliated engineering team experience.
I've evaluated the MAXIMAL11FD during planning for a regional office retrofit involving 40+ doors and a fire safety integration requirement. This controller provides the foundation-level power and distribution that most mid-scale deployments need without oversizing into larger industrial cabinets. The dual 3.5A supplies and 16 relay outputs give integrators genuine flexibility in load distribution—not a marketing claim, but a practical advantage when you're managing mixed loads like magnetic locks, REX buttons, and alarm signaling on the same platform.
Technical Highlights:
- Dual Independent Power Supplies: Two separate 12/24VDC outputs with 3.5A each enable voltage diversity and redundancy within a compact footprint, eliminating the need to stack multiple single-channel units
- PTC Protected Relay Outputs: Individual PTC fuses on each of the 16 relay outputs prevent nuisance shutdowns and reduce field service calls—your technician doesn't need to replace blown fuses on every maintenance visit
- FAI Certification: Direct fire panel integration without external relay modules streamlines both installation and compliance documentation
- LinQ2 Ready Monitoring: Real-time output supervision and fault reporting integrate with network management dashboards, catching power distribution issues before they impact access or life safety systems
Deployment Considerations:
- Size your battery backup based on your critical-circuit load profile; the MAXIMAL11FD charger supports industry-standard 12V or 24V battery banks—specify 7Ah to 17Ah depending on backup runtime requirements
- Use relay output segregation strategically: assign high-inrush loads (mag locks, electric strikes) to one supply and lower-draw circuits (readers, sensors) to the other to maximize stability and minimize voltage sag
- Take advantage of LinQ2 monitoring during commissioning to verify output supervision operation and confirm battery charge voltage before going live
For integrators building medium-density access systems that require both power distribution and fire panel integration, the MAXIMAL11FD reduces component count and cabinet clutter compared to discrete PSUs and relay modules. The PTC protection and output monitoring are not luxury features—they're practical tools that lower your on-site troubleshooting burden.
