Altronix R248ULI CCTV Power Supply

Overview

The Altronix R248ULI is a professional-grade 2U rack-mount power distribution unit engineered for CCTV and access control installations. This supply delivers 24VAC output at 12.5A maximum current across eight individually fused isolated output circuits, providing circuit-level protection and fault isolation critical to commercial video surveillance systems. The R248ULI accepts 115VAC input power, making it compatible with standard North American electrical infrastructure. Each output is independently fused, ensuring that a fault on one circuit does not cascade to downstream devices or other outputs.

Key Features

• Eight Fused Isolated Outputs: Each output is independently fused and galvanically isolated, preventing cross-circuit faults and enabling granular power management across multiple cameras, encoders, or access control nodes.
• 24VAC @ 12.5A Maximum Output: Delivers sufficient power density for mid-scale CCTV deployments, supporting turret cameras, PTZ motors, door locks, and other 24VAC-rated security devices.
• 115VAC Input: Operates from standard North American utility voltage with no step-down transformer required.
• 2U Rack Mount Form Factor: Integrates seamlessly into standard 19-inch equipment racks alongside network switches, NVRs, and fire alarm control panels, saving physical space and simplifying cabling infrastructure.
• UL Listed: Meets Underwriters Laboratories safety standards, ensuring compliance with commercial installation codes and insurance requirements.
• CE Marked: Conforms to European safety and electromagnetic compatibility directives, supporting international project deployments.

Integration & Compatibility

The R248ULI is designed for integration into distributed CCTV architectures where multiple 24VAC devices require independent, supervised power delivery. The isolated output design is particularly valuable in installations featuring analog PTZ cameras with motorized pan-tilt-zoom heads, which draw significant inrush current and benefit from dedicated fused circuits. The compact 2U footprint positions the R248ULI as a central power hub in rack-based deployments, reducing cable runs from power distribution to remote field devices.

Installers and integrators can configure each output independently, allocating current budgets per circuit based on downstream load requirements. This modular approach simplifies troubleshooting: a shorted camera coil or failed solenoid on one output will trip only its dedicated fuse, leaving other circuits operational and maintaining system uptime during fault diagnosis and component replacement.

Ted Perry

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

I've specified the Altronix R248ULI on several mid-scale retail and municipal CCTV builds, and the isolated fused output architecture has proven valuable during both commissioning and long-term operations. The eight independent circuits give you real granularity when distributing power to a mixed load of cameras, access control readers, and auxiliary devices.

Technical Highlights:

• Circuit Isolation: Each of the eight outputs on the R248ULI is galvanically isolated with individual fusing, preventing a fault on one camera circuit from affecting others—critical for system resilience in multi-camera deployments.
• Current Density: The 12.5A aggregate capacity at 24VAC supports approximately 1.5A per output on average, sufficient for turret cameras, PTZ motors, or access control solenoids operating at that voltage class.

Deployment Considerations:

• Verify downstream device voltage and current ratings against your distribution plan; load balancing across the eight outputs will extend fuse life and reduce nuisance trips during normal operation.
• Install the R248ULI in a climate-controlled rack environment; do not rely on passive cooling in direct sunlight or high-ambient outdoor cabinets without additional ventilation.

The combination of UL listing, CE marking, and isolated fused outputs makes the R248ULI a solid choice for integrators who need a standards-compliant, fault-tolerant 24VAC distribution hub for mid-sized surveillance and access control projects.