Altronix T1AXK3F4D 24VDC Power Supply

Overview

The Altronix T1AXK3F4D is a compact 24VDC regulated power supply designed for security and access control installations requiring distributed power distribution across multiple circuits. This unit delivers 24 volts at 6 amperes aggregate current across four independent regulated outputs, making it suitable for CCTV systems, access control readers, door locks, and auxiliary security peripherals. The T1AXK3F4D incorporates individual PTC (Positive Temperature Coefficient) protection on each output channel, eliminating the need for external fusing while preventing nuisance shutdowns from transient surge conditions.

Key Features

• Four Regulated Outputs: Each output provides independent 24VDC regulation with individual PTC thermal protection for safe, reliable power distribution without external fuses
• 6 Ampere Total Capacity: 6A aggregate output current supports multiple devices per channel, enabling flexible load balancing across security peripherals
• PTC Short-Circuit Protection: Integral PTC devices on each output automatically limit fault current and self-reset when normal conditions return, reducing service callbacks
• 115VAC Input: Operates from standard North American wall power, compatible with existing electrical infrastructure in commercial and residential installations
• Compact DIN-Rail Enclosure: Space-efficient form factor fits standard electrical cabinets and security equipment racks alongside control modules and networking equipment
• Battery Backup Capability: Integrated charger circuit supports external 12VDC sealed lead-acid battery connection for maintaining power to critical circuits during mains failure
• Regulated Output Voltage: Tight voltage regulation ensures consistent device operation and eliminates voltage-dependent performance drift in CCTV encoders, access readers, and lock controllers
• Thermal Management: Built-in over-temperature shutdown protection prevents component degradation during extended high-load operation or environmental stress

Integration & Compatibility

The T1AXK3F4D integrates seamlessly into security architectures requiring multiple isolated 24VDC rails. The four independent outputs enable segregation of power-hungry devices (such as electromagnetic locks) from sensitive analog or digital circuits (such as access control readers or door sensors), reducing noise coupling and improving system stability. The PTC protection model eliminates coordination complexity—each channel self-protects without requiring upstream fusing decisions or load calculation spreadsheets. The 115VAC input accepts standard North American power, and the battery backup circuit accepts 12VDC sealed lead-acid batteries rated between 4Ah and 20Ah, enabling flexible UPS configurations for life-safety and access-on-power-loss requirements.

Integrators commonly deploy the Altronix T1AXK3F4D in distributed access control installations where multiple readers, electronic locks, and request-to-exit devices require independent power channels, as well as in multi-camera CCTV arrays where separate power circuits prevent firmware upload or reset events on one camera from affecting others. The unit's compact footprint and DIN-rail mounting align with cabinet-based security control layouts.

Ted Perry

Perspective based on aggregated IP Security Depot and affiliated engineering team experience.

I've specified the Altronix T1AXK3F4D in access control projects where four independent power circuits eliminate single-point-of-failure risk. The PTC protection removes the need for circuit-by-circuit fusing, which speeds cabinet commissioning and reduces nuisance trips when readers draw inrush current. The T1AXK3F4D's 6A aggregate capacity suits a typical four-reader installation with modest lock loads.

Technical Highlights:

• Output Architecture: Four isolated 24VDC rails prevent digital noise from lock solenoids coupling into access reader sensor lines, improving read reliability and reducing false rejection rates
• PTC Thermal Protection: Self-resetting protection on each output eliminates the need to stock spare fuses or respond to random lockouts caused by momentary surge spikes during relay switching
• Battery Integration: Integrated charger accepts standard 12VDC SLA batteries, enabling emergency power for access-on-loss scenarios without external controller logic

Deployment Considerations:

• Size the external battery carefully: 4Ah supports ~30 minutes of full-load operation across all four outputs; 7Ah or larger recommended for sustained emergency access during extended power loss
• Segregate high-current loads (electronic locks) to separate output channels from low-current loads (readers, sensors) to preserve voltage stability under fault conditions

The T1AXK3F4D is reliable for mid-sized access control and distributed CCTV architectures where power isolation and automatic protection eliminate ongoing fuse management and simplify system diagnostics.