Altronix T1MK74LFM 24VDC Power Supply/Charger
Overview
The Altronix T1MK74LFM is a 24VDC regulated power supply and charger designed for access control, surveillance, and security system installations. This unit delivers a continuous 10 amperes at 24VDC output with integrated fused distribution across four separate door control circuits. Built for professional integrators and system installers, the T1MK74LFM provides reliable power conditioning and backup charging capability in a compact format suitable for wall or rack mounting in security cabinets.
Key Features
- 24VDC Output: Regulated 24VDC at 10 amperes maximum continuous current
- Four Fused Door Control Outputs: Individual fuse protection on each of four independent circuits for door lock, magnetic lock, and access control device power
- Fused Distribution: Built-in fusing protects downstream circuits and simplifies troubleshooting during system commissioning and maintenance
- UL-Listed Power Supply: ULX certification ensures compliance with commercial and institutional electrical codes
- 115VAC Input: Standard North American mains voltage input for straightforward installation in existing electrical infrastructure
- Battery Backup Ready: Integrated charging circuit supports rechargeable battery backup for emergency egress and system continuity during power loss
- Compact Form Factor: Space-efficient design fits standard security equipment racks and wall-mounted enclosures
- Professional-Grade Construction: Designed for integrator-level installations requiring multiple independent power feeds to access control hardware
Integration & Compatibility
The T1MK74LFM is widely deployed in multi-door access control systems where separate power feeds to individual door strikes, electric locks, and request-to-exit buttons are required. The four independent fused outputs allow each door circuit to be isolated and protected independently, reducing the risk of cascading failures when one circuit experiences an overcurrent condition. This topology is standard in security integrator practice for mid-scale access control installations spanning 2 to 4 controlled openings.
The unit's 24VDC output voltage is compatible with standard access control electromagnets, electric strikes, and power-over-Ethernet powered device chargers. The integrated battery charging circuit supports lead-acid and sealed rechargeable battery modules rated for 24VDC, enabling automatic failover to battery power during utility outages—a critical feature for maintaining emergency egress compliance in secured facilities.
Power Distribution & Fusing
Each of the four output circuits includes individual fusing. This architecture is essential in access control deployments where a short circuit on one door lock circuit should not affect power to other doors. The Altronix T1MK74LFM distributes the full 10-ampere capacity across the four circuits, allowing flexible allocation of current per door based on load requirements during system design.
I've specified the Altronix T1MK74LFM on access control projects where multiple door circuits require independent fused power distribution and backup charging capability. This unit delivers the reliability and circuit isolation that integrators need when deploying four-door systems in commercial or institutional settings. The T1MK74LFM is a workhorse in the 24VDC power supply category for multi-door access control.
Technical Highlights:
- 10A @ 24VDC Output: Sufficient capacity for four standard electromagnetic strikes or magnetic locks with room for load growth on individual circuits
- Four Independent Fused Outputs: Each door circuit is protected and isolated, preventing single-point failures from cascading across the entire system
- UL-Listed Design: Meets electrical code requirements for commercial access control and life-safety applications
- Battery Charging Integrated: No need for separate charging equipment; the unit charges backup batteries automatically, maintaining emergency egress capability during power events
Deployment Considerations:
- Verify fuse amperage ratings during commissioning to match door lock current draw; undersized fuses will nuisance-trip during normal operation
- Position the unit in a climate-controlled cabinet to ensure reliable battery charging and extended power supply lifespan
- Use the four independent outputs strategically—pair slower-draw devices (request-to-exit buttons, sensors) on one circuit and higher-draw locks on dedicated circuits to balance load and minimize fuse events
- Confirm backup battery capacity during design phase; the charging circuit assumes a properly sized battery module and will not compensate for undersized backup capacity
The T1MK74LFM is a sound choice for multi-door access control systems where circuit isolation, code compliance, and integrated backup charging simplify installation and reduce long-term support burden. It represents standard practice in professional access control deployments.
