Altronix SMP7PMP4 Power Supply Charger

Overview

The Altronix SMP7PMP4 is a versatile 12/24VDC power supply and charger designed for security and access control installations requiring reliable, supervised power distribution. This unit delivers up to 6A output current across four independently fused outputs, making it ideal for powering multiple devices—cameras, access control readers, intercoms, and auxiliary equipment—in a single compact enclosure. The SMP7PMP4 integrates battery backup and AC failure supervision, ensuring continuous operation during power interruptions and maintaining system integrity across your security infrastructure.

Key Features

• Four Fused Outputs: Independent output channels with individual fuse protection enable flexible load distribution and fault isolation across connected devices
• Dual Voltage Support: Selectable 12VDC or 24VDC output voltage accommodates a wide range of security and access control equipment
• 6A Maximum Current Rating: Delivers up to 6A total output capacity for power-hungry applications and multi-device installations
• Battery Backup Capability: Integrated battery backup keeps essential systems operational during AC mains failure, critical for uninterrupted security coverage
• AC Fail Supervision: Built-in AC failure detection signals when mains power is lost, enabling immediate response protocols
• Low Battery Supervision: Monitors battery charge state and alerts operators when reserve power drops below usable levels
• Battery Presence Detection: Confirms backup battery is connected and functional, preventing silent failures
• Compact Form Factor: Board dimensions of 7"L × 4"W × 1"H fit standard rack and enclosure configurations without requiring dedicated cabinet space
• Input Voltage Range: Accepts 16–28VAC input, tolerating typical utility voltage variations across North American and international installations
• BC300 Enclosure: Rugged steel housing protects the power supply board and battery from environmental exposure and mechanical damage
• CE Approval: Meets European regulatory standards for electrical safety and EMC compatibility

Integration & Compatibility

The SMP7PMP4 integrates seamlessly into security systems requiring centralized power distribution with supervised backup. The four output channels support independent load control, enabling integration with legacy and modern devices simultaneously. Supervision outputs (AC fail, low battery, battery presence) connect to security control panels, DVR/NVR systems, or standalone monitoring devices, triggering alerts and logging events when faults occur. The wide input voltage tolerance (16–28VAC) ensures compatibility with both standard 24VAC transformer outputs and power-limited power sources common in access control and camera installations.

Installation teams benefit from the modular design: the SMP7PMP4 board mounts easily within the BC300 enclosure, and fused outputs provide circuit-level protection matching the fault isolation requirements of professional security deployments. The compact 7" × 4" × 1" board footprint allows flexible placement in equipment racks, wall-mount cabinets, or equipment rooms without excessive space demands.

Ted Perry

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

I've specified the Altronix SMP7PMP4 in access control and surveillance projects where distributed power with battery backup is non-negotiable. The four independent fused outputs handle typical mixed-load scenarios—two outputs for IP cameras, one for card readers, one for auxiliary devices—without requiring external distribution panels. The supervision features are essential: AC fail and low battery alerts let NOC teams respond before systems drop offline.

Technical Highlights:

• Four Independent Outputs: Fused channels isolate faults; a failed camera or reader doesn't starve power to other devices
• Dual Voltage Flexibility: 12VDC and 24VDC outputs address legacy equipment and modern IP camera specs from a single platform
• Battery Supervision: AC fail, low battery, and battery presence detection feed directly into control panels or monitoring systems, eliminating silent failures
• Wide Input Tolerance: 16–28VAC input range accommodates transformer variations and prevents nuisance power cycling

Deployment Considerations:

• Size the backup battery based on expected hold-up time and connected load; the SMP7PMP4 provides the supervision infrastructure, but battery selection depends on your downtime tolerance
• Route supervision outputs to your central monitoring system or control panel; AC fail alerts must trigger audible/visual alarms and logging to ensure operator awareness
• Mount the BC300 enclosure in a climate-controlled equipment room to extend battery life and prevent thermal stress on the charger circuit

The SMP7PMP4 delivers the reliability and diagnostic visibility needed for professional security deployments. It's not a consumer-grade supply—it's engineered for integrators who need fused distribution, battery backup, and fault supervision in a compact package.