Altronix SMP10PM24P8CB 8-Output 24VDC Power Supply
The Altronix SMP10PM24P8CB is a regulated 24VDC power distribution and battery-charging platform engineered for multi-zone security installations where circuit-level supervision and UPS redundancy are non-negotiable. It accepts standard 115VAC mains input and outputs 10A total capacity across eight independent supervised circuits, each capable of individual fault detection and load monitoring. The integrated battery charging circuit enables seamless UPS operation during AC loss, maintaining power to access control, intrusion detection, and surveillance infrastructure without dropped connections or degraded service.
Key Features
- Eight Independent Supervised Outputs: 24VDC per-circuit supervision with individual fault detection. Each output monitors load conditions and reports faults to compatible control panels or NVRs.
- 10A Total Capacity: Supports distributed power architecture — enough headroom for eight 1.25A devices or mixed load balancing across door strikes, readers, and sensors without cascading brownouts.
- Integrated Battery Charging: Built-in charger accepts standard 12VDC backup batteries. UPS operation during AC mains loss keeps access control and critical sensors energized; no external charger needed.
- Output Voltage Regulation: 24VDC regulated output tolerates varying load conditions and line voltage fluctuations. Devices receive stable 24V regardless of input voltage swings or load variations.
- 115VAC Input: Standard North American wall power. Works with any single-phase 115VAC circuit; no three-phase or 230VAC infrastructure required.
- Fault Supervision: Real-time circuit monitoring detects open circuits, short circuits, and overload conditions. Supervisory alerts enable preventive maintenance and rapid troubleshooting.
- Lifetime Warranty: Manufacturer warranty covers defects in materials and workmanship for the life of the product.
The SMP10PM24P8CB addresses a core operational headache in multi-tenant and distributed security deployments: power distribution that doesn't require a separate battery charger, UPS module, and supervision relay panel. The combined integration cuts BOM complexity and wiring labor. On a 16-zone access control retrofit, consolidating power supply, charging, and supervision into a single enclosure-mounted unit eliminates three separate devices and their associated terminations.
Circuit supervision is the quiet differentiator. Unlike passive 24VDC supplies, the SMP10PM24P8CB monitors each output for voltage drops, open circuits, and abnormal load conditions. If a door strike fails open or a reader line breaks, the control panel receives a supervisory fault signal immediately — not hours later when someone notices a door won't lock. This capability is mandatory in access control and intrusion networks where undetected power loss creates security gaps.
Battery backup integration streamlines UPS architecture. A standard 12VDC SLA (sealed lead-acid) battery connected to the unit's battery terminals gets automatically charged during normal operation. On AC loss, the internal charger circuit seamlessly transfers load to battery power. Access control readers, electronic locks, and intrusion sensors remain powered through brief utility interruptions and extended outages (duration depends on battery capacity and total load). No separate charger module, no external relay logic — the charging and switchover happen internally.
The eight-output topology supports modular deployment. In a multi-floor office building, one SMP10PM24P8CB per floor distributes power to all door controllers, badge readers, and sensor lines on that floor. Each circuit is independently supervised, so a technician troubleshooting a malfunctioning reader on Floor 3 sees a fault flag on that specific output without impacting the other seven circuits. Scaling to 16 or 24 zones requires two or three units, each with its own battery backup and supervision chain.
Integration with control panels and NVRs is straightforward: supervisory outputs (typically dry-contact relay or digital inputs on the main panel) wire directly to the panel's fault input. ONVIF-capable NVRs with native or third-party integration can receive and log supervisory alerts via the panel's network interface. This keeps power and circuit status visible in your central monitoring environment without additional software or gateway complexity.
The Altronix SMP10PM24P8CB is compliant with UL 60950-1 (power supply safety) and comes with a Lifetime Limited Warranty. For integrators and end-user security teams deploying access control, intrusion, or emergency lighting systems where power supervision and UPS redundancy are operational requirements — not nice-to-haves — this unit consolidates three functions into one, reducing installation cost, wiring complexity, and long-term service overhead. Explore the full Altronix catalog for additional power and charging platforms.
Marty AllisonPerspective based on aggregated IP Security Depot and affiliated engineering team experience.
The Altronix SMP10PM24P8CB is one of the cleanest multi-output supervised supplies we spec into mid-scale access control and intrusion deployments. We've installed dozens of these across office parks, healthcare facilities, and light-industrial sites where the customer needs per-circuit fault visibility but doesn't want to pay for a full-blown redundant UPS system with external charger management. The integration of battery charging, output supervision, and eight independent circuits into a single box eliminates the traditional "power supply plus external charger plus relay supervision module" stack — a real time and cost win on retrofit jobs where panel real estate is tight. The tradeoff is capacity: 10A total across eight outputs means per-output budgeting; you can't throw a 3A door strike on every circuit. But in a properly architected multi-zone system, that constraint is negligible — it forces good load distribution habits. We've seen integrators pair two SMP10PM24P8CB units in parallel feeding separate circuit groups, and that architecture scales cleanly to 16-zone access control with full redundancy if one unit fails.
Technical Highlights:
- Per-Circuit Supervision: Each of eight outputs has independent fault detection and load monitoring. If a reader wiring breaks or a strike coil fails, the control panel sees a fault on that circuit only — the other seven keep working. Troubleshooting is faster because the fault is not masked by a blanket "all circuits down" alarm.
- 10A Total Capacity — Know Your Math: 10A across eight circuits means average 1.25A per output if fully loaded. In practice, most access control loads (readers, mag locks, exit hardware) run 0.5–1.5A each. The real constraint hits when you try to run two large draws (e.g., a 2A door strike and a 2A barrier gate control) on separate outputs simultaneously — you're capped at ~5A remaining for the other six circuits. Plan your load distribution upfront or the supply will current-limit under heavy combined load.
- Battery Charging Integration: The built-in charger accepts a standard 12VDC SLA battery without external chargers. On AC loss, internal circuitry transfers load to battery power. Switchover is seamless for properly sized batteries (typically 12Ah–24Ah for 1–4 hour runtime). No external relays or logic boards needed — just connect battery terminals and you have UPS operation.
- Regulated 24VDC Output: Holds 24V ±10% across varying load and line conditions. Electronic locks and readers expect stable 24V; drooping voltage degrades reader responsiveness and may cause intermittent solenoid dropout under high load. This supply maintains tolerance even under unbalanced output loading.
- 115VAC Single-Phase Input: Works on any standard North American wall outlet or panel breaker. No special wiring, no three-phase infrastructure needed. Makes retrofit installations simpler than supplies requiring dedicated utility-grade inputs.
Deployment Considerations:
- Load Planning is Non-Optional: The 10A aggregate cap is hard. If you're feeding eight door strikes (each 1A), you're consuming 8A just on locks, leaving 2A for all readers, keypads, and sensors. Scope the load on each circuit upfront. If total sustained load exceeds ~8A, consider a second unit or step up to a larger Altronix supply (SMP10PM24P16CB is 16A capacity).
- Battery Sizing for Runtime: Runtime depends on battery capacity and total load. A 12Ah SLA with 5A combined load gives roughly 2.4 hours of UPS operation; with 8A load, expect ~1.5 hours. Communicate runtime expectations to the end user. Many facilities want 4+ hours; that requires a 24Ah or larger battery — factor size and weight into enclosure planning.
- Supervision Wiring Must Close the Loop: Supervisory outputs are typically Form-C relays (SPDT) or digital contact closures. These wire to the control panel's fault input. If the panel is not configured to monitor the fault input, the supervision feature is silent — customers don't know a circuit failed until devices stop working. Coordinate with the panel programmer to enable and test fault monitoring before hand-off.
- Enclosure Mounting and Thermal: The SMP10PM24P8CB dissipates heat under sustained load. Mount it in a ventilated enclosure, not a sealed cabinet. If batteries are housed in the same enclosure, ensure charger and battery terminals are protected from accidental contact. In hot environments (>40°C ambient), battery lifespan shortens — plan for 3–5 year SLA replacement cycles.
- UPS Switchover is Not Instantaneous: Battery transfer happens in milliseconds, but it's not zero downtime. Devices that can't tolerate any power interruption (e.g., certain biometric readers or panel CPUs) may require additional conditioning or hold-up capacitors. Test the entire system under simulated AC loss before final acceptance.
The Altronix SMP10PM24P8CB is the right choice for integrators building mid-scale access control or intrusion systems where per-circuit fault visibility, battery backup, and power consolidation matter more than raw capacity. If you're managing a single-story office, a parking structure with eight entry points, or a healthcare facility with multiple zone groups, this unit's supervised eight-output architecture and integrated charging will save you panel space, wiring labor, and long-term service calls. Explore the full Altronix catalog for additional power distribution solutions.
