Altronix ALTV2416ULCBI 16-Output 24VAC Isolated Power Supply

Altronix ALTV2416ULCBI 24VAC CCTV Power Supply

Overview

The Altronix ALTV2416ULCBI is a 24VAC transformer-based power supply engineered for distributed CCTV and access control installations requiring multiple isolated outputs with individual overcurrent protection. Housed in a BC300 steel enclosure, this unit delivers 25A total capacity across 16 Class 2 isolated outputs, making it suitable for mid-to-large camera arrays, card readers, and mixed security loads in commercial and institutional environments.

Key Features

• 16 Isolated PTC Class 2 Outputs: Each output is independently supervised and protected by Positive Temperature Coefficient (PTC) devices, eliminating the need for external fuses or relays while preventing nuisance shutdowns from transient loads.
• 24VAC @ 25A Primary Rating: Supplies 115VAC input, delivering sufficient capacity for simultaneous operation of multiple cameras, dome motors, and auxiliary security devices.
• BC300 Steel Enclosure: Compact, wall-mountable cabinet with internal DIN rail for integration into control rooms and equipment closets.
• Individual Output Supervision: Each of the 16 outputs can be independently monitored for load status, enabling granular circuit diagnostics without complex external switching.
• PTC Overcurrent Protection: Self-resetting polymeric protection reduces maintenance burden compared to mechanical breakers or fused distributions.
• Class 2 Rated Outputs: Compliant with secondary circuit safety requirements, suitable for low-voltage sensor and control installations.

Integration & Compatibility

The ALTV2416ULCBI integrates directly into distributed architecture designs where multiple isolated 24VAC branches are required. Its 115VAC input accepts standard North American mains power; integrators can pair it with UPS systems for battery-backed operation on mission-critical circuits. The 16-output topology is compatible with both analog and network camera installations, card access systems, intercom power distribution, and auxiliary relay loads up to the per-port current rating defined by PTC characteristics.

Technical Operation

Each output on the ALTV2416ULCBI operates as an independent 24VAC branch, isolated from other outputs via internal transformer windings. This isolation architecture protects against ground loops and load-induced voltage sag that would degrade performance on shared rails. PTC devices are temperature-responsive, automatically limiting current when overcurrent conditions occur, then resetting when the fault clears. This design eliminates the recurring cost and logistics of fuse replacement while maintaining Class 2 safety compliance.

James Everett

I've specified the Altronix ALTV2416ULCBI across several large-scale camera rollouts where isolated output distribution was non-negotiable. The 16-output topology with individual PTC supervision delivers the isolation and fault-tolerance that shared-rail supplies simply cannot match, particularly in retrofit installations where ground loops are a chronic problem.

Technical Highlights:

• Isolated Output Architecture: Each of the 16 outputs is transformer-isolated, preventing cross-circuit voltage sag and ground-loop coupling—critical when mixing analog and network devices on the same distribution.
• PTC-Based Overcurrent Protection: Self-resetting polymeric devices eliminate fuse management and reduce mean time to restoration on transient faults, a substantial advantage in distributed systems spanning multiple rooms or floors.
• 24VAC @ 25A Total Capacity: Adequate for a mixed load of 4–6 PTZ domes, 8–12 fixed cameras, and several accessory circuits in a single cabinet.

Deployment Considerations:

• Verify per-output current budgets against PTC trip thresholds; staggered startup sequences or soft-start circuits may be needed if multiple high-inrush loads (such as heaters or motors) are energized simultaneously.
• The BC300 enclosure is compact—plan thermal management if all 16 outputs are fully loaded in high-ambient environments; passive convection may be insufficient without additional ventilation.
• Class 2 rating limits output-to-ground voltage to 30V RMS; confirm compatibility with 24VAC sensors and access control hardware before installation.

The ALTV2416ULCBI is a solid choice for integrators who prioritize isolation, individual circuit supervision, and low-maintenance operation over consolidated power rails. Its distributed architecture and PTC-based fault handling make it well-suited to mission-critical camera systems and access control deployments where downtime costs exceed the price premium of isolated outputs.