Altronix MAXIMAL3FD Access Power Controller
Overview
The Altronix MAXIMAL3FD is a comprehensive access control power management solution designed for mid to large-scale security installations. This controller combines regulated power distribution with integrated battery charging and relay control in a single BC800 enclosure, eliminating the need for multiple components on distributed access control architectures. The MAXIMAL3FD supports 115VAC input with dual output voltage options (12VDC or 24VDC at 6A maximum), making it compatible with diverse door lock, magnetic lock, and electromagnetic exit device specifications across a single deployment.
Key Features
- 16 PTC-Protected Relay Outputs: Each output is individually protected with Positive Temperature Coefficient devices to prevent nuisance trips and reduce false alarms from transient load conditions
- Selectable Dual Output Voltage: Configure as 12VDC or 24VDC at 6A per channel, allowing single-controller standardization across mixed-voltage access points
- Integrated Power Supply/Charger: 115VAC input eliminates separate UPS modules; built-in charger supports lead-acid and sealed gel-cell batteries for automatic failover during utility loss
- LinQ2 Ready: Native integration with Altronix monitoring and control platforms for centralized supervision and remote diagnostics
- FAI Certification: Meets Fire Alarm Interface requirements for coordinated building safety system integration
- BC800 Enclosure: Compact 16-gauge steel housing with DIN rail mounting; fits standard electrical cabinets for streamlined system layouts
- Class 2 Relay Rated: All outputs rated as Class 2 circuits, simplifying low-voltage code compliance during design and inspection phases
- Battery Backup Capable: Integrated charger supports automatic battery charging for uninterruptible access control during power interruptions
Integration & Compatibility
The MAXIMAL3FD integrates directly with Altronix access control ecosystems via LinQ2 networking, enabling real-time relay state monitoring, event logging, and remote troubleshooting from centralized management stations. FAI compliance allows seamless interface with building fire alarm systems, ensuring access control coordination during emergency evacuation. The PTC-protected relay outputs support electromagnetic locks, electric strikes, request-to-exit devices, and auxiliary loads common in commercial access control installations. Dual voltage configuration (12VDC or 24VDC) matches door hardware specifications without requiring separate controllers per voltage class.
The controller's 6A per-channel capacity accommodates typical magnetic lock currents (5–6A at 12VDC or 3–4A at 24VDC), reducing the need for external relay banks or auxiliary power distribution. The integrated charger simplifies wiring; a single set of battery connections supports automatic charge cycling during normal operation and seamless handoff to battery power during AC loss—no external charge controller or intelligent charger required.
Ted PerryPerspective based on aggregated IP Security Depot and affiliated engineering team experience.
I've specified the Altronix MAXIMAL3FD on several mid-tier access control rollouts, and it consistently simplifies the electrical architecture. The combination of 16 relay outputs, integrated 115VAC charger, and LinQ2 readiness means integrators can consolidate what often requires three separate modules into one cabinet-mounted controller. The PTC output protection is particularly valuable in field deployments where transient spikes from electromagnetic lock solenoids can cause nuisance faults.
Technical Highlights:
- Voltage Flexibility: Selectable 12VDC or 24VDC output at 6A matches door hardware across the same system without controller swaps
- Battery Integration: Integrated charger with lead-acid/gel-cell support eliminates external UPS complexity and reduces point-of-failure count
- Relay Protection: PTC devices on all 16 outputs guard against electromagnetic transient nuisance trips during solenoid engagement
- Fire Code Alignment: FAI certification and Class 2 rating streamline electrical inspections in jurisdictions requiring coordinated fire/access systems
Deployment Considerations:
- Confirm battery amp-hour rating matches expected runtime during facility surveys; the charger manages float and equalization, but capacity planning remains the integrator's responsibility
- Route relay outputs to cabinet-mounted terminal blocks for clean wire management; the BC800 enclosure accepts standard DIN rail components
- Validate LinQ2 network topology during commissioning to ensure all relay state changes are logged; centralized monitoring of output faults reduces field callbacks
The MAXIMAL3FD is a solid choice for integrators balancing cost, reliability, and control density in access systems. The integrated charger and PTC protection reduce design complexity, and LinQ2 monitoring visibility makes ongoing maintenance predictable. Specify it where you need 12–16 independently controlled door circuits with battery backup in a single module.
