Altronix EFLOW3N4D 4-Output 12/24VDC Power Supply/Charger

Altronix EFLOW3N4D Power Supply/Charger

Overview

The Altronix EFLOW3N4D is a dual-voltage power supply and charger designed for security and access control system integration. Delivering 12/24VDC @ 2A output across four independently supervised Class 2 PTC-protected circuits, the EFLOW3N4D provides reliable primary and backup power for distributed field devices, entry control panels, sensors, and auxiliary equipment. The unit operates from standard 120VAC 60Hz input and includes integrated battery backup functionality with comprehensive supervision—AC fail detection, low battery monitoring, and battery presence sensing—making it ideal for installations requiring continuous operation during mains interruption.

Key Features

• Dual Output Voltage: Selectable 12VDC or 24VDC output to match installed device requirements
• 4 PTC-Protected Outputs: Each output individually protected by Positive Temperature Coefficient devices to prevent overcurrent conditions and reduce nuisance breaker trips
• 2-Amp Per Output: Sufficient capacity for multi-device circuits—typical ratings support access readers, electromagnetic locks, request-to-exit buttons, and auxiliary loads
• Battery Backup Capability: Integrated charger and supervision system supports sealed lead-acid or compatible battery modules for bridging mains power loss
• AC Fail Indication: Circuit-level supervision detects loss of AC input and initiates battery discharge sequence
• Low Battery Supervision: Continuous monitoring prevents overdischarge of backup batteries
• Battery Presence Detection: Automatic sensing confirms battery module installation and readiness
• Fire Alarm Interface (FAI): Direct connection to fire alarm systems with integrated disconnect function for coordinated emergency shutdown
• LinQ2 Ready: Compatible with Altronix LinQ2 cloud-connected monitoring and remote diagnostics for multi-site fleet management
• BC300 Enclosure: Compact steel cabinet suitable for wall, DIN rail, or surface mounting in secure equipment rooms or closets
• Input Voltage: 120VAC 60Hz
• Class 2 Certified Outputs: Meets UL/NEC Class 2 requirements for safe low-voltage distribution

Integration & Compatibility

The EFLOW3N4D is engineered for integrators deploying multi-output power architectures across access control, surveillance, and intercom systems. The fire alarm disconnect feature enables direct integration with fire alarm control panels, ensuring coordinated power management during emergency events. Battery backup support extends runtime during mains outages—typical 4-hour bridge capacity with standard batteries allows system stabilization and orderly shutdown protocols. The unit's PTC output protection simplifies circuit design by eliminating external fuses on individual device circuits, reducing component count and field wiring time. LinQ2 readiness enables remote power-status visibility across distributed installations without requiring site visits for battery testing or supervision verification.

Package Contents

Unit ships with BC300 steel enclosure, internal mounting hardware, and terminal block connectors. Battery module and external wiring are ordered separately based on system design requirements.

James Everett

The Altronix EFLOW3N4D is a solid choice for multi-reader or multi-door access control systems where distributed power becomes necessary. I've specified this unit in installations with 4–6 readers plus auxiliary devices because the four independently protected outputs eliminate the need for field-level power distribution blocks. The combination of AC fail, low battery, and battery presence supervision means you're not flying blind if a battery fails or loses charge—the system will alert you.

Technical Highlights:

• PTC Circuit Protection: Individual overcurrent protection per output prevents one failed reader or solenoid from taking down all four circuits. Eliminates external fuses and reduces callback trips.
• Fire Alarm Integration: The FAI and integrated disconnect function ensures that when a fire alarm triggers, power can be cut to access readers and locks in a coordinated, controllable manner rather than relying on whole-panel shutdown.
• Dual Voltage Flexibility: 12VDC and 24VDC on the same unit lets you support legacy 12V equipment and newer 24V readers without inventory fragmentation.
• Battery Supervision: AC fail, low battery, and battery presence detection prevent the common scenario where a site loses power and no one knows the backup battery is depleted.

Deployment Considerations:

• Confirm your battery module matches Altronix specifications before ordering; incorrect battery types can cause overcharge conditions or poor runtime.
• Size your backup battery based on expected load and required runtime—a typical sealed lead-acid will bridge 4 hours for a light reader configuration, but heavy solenoid loads will reduce that window significantly.
• The EFLOW3N4D occupies modest DIN rail or wall space; verify your enclosure layout has adequate thermal clearance around the unit's charging circuitry.

If your installation spans multiple buildings or distributed reader arrays, the LinQ2 readiness is worth the small investment—you'll catch battery aging and AC anomalies before field calls become emergencies. For standard access control retrofits or new builds with 4–8 field devices, the EFLOW3N4D delivers straightforward, reliable supervision without unnecessary complexity.