Altronix SMP10PM24P16 24VDC 10A Supervised Power Supply
Overview
The Altronix SMP10PM24P16 is a 24VDC regulated power supply engineered for mid-scale security and access control installations where independent outlet monitoring and supervised power distribution are required. It accepts 115VAC single-phase input and delivers 10A maximum current across 16 dedicated supervised output terminals. Each output is individually monitored — meaning the unit detects open circuits, shorts, or load faults on any branch without cascading shutdown across other outputs. This architectural choice matters: you lose one access reader or camera power line, you get an alarm on that channel alone, not a facility-wide blackout.
Key Features
- 16 Individually Supervised Outputs: Each terminal pair is independently monitored for fault conditions. If a wired reader draws excessive current or a camera feed breaks, the SMP10PM24P16 signals that specific channel fault, preserving power to the remaining 15 circuits. Critical when devices are distributed across a building and you cannot afford a single fault to cascade.
- 24VDC Regulated Output: Delivers stable 24-volt direct current to all connected devices. Regulation prevents voltage sag as load increases — important for access control readers, electromagnetic locks, and powered sensors that lose functionality below 22V. Clean regulated output also extends the lifespan of low-voltage electronics.
- 10A Total Capacity: Provides up to 10 amperes distributed across all 16 outputs. For reference, a typical access control reader draws 200–400 mA; an IP camera draws 3–8A depending on IR and model. You can support roughly 20–30 readers or 1–2 large cameras per output before reaching capacity — plan load allocation accordingly during design phase.
- 115VAC Single-Phase Input: Plugs into standard North American wall receptacles. No three-phase or 208V requirement — simplifies installation in small to mid-sized facilities. Input isolation prevents ground loops that could corrupt low-voltage control signals.
- Built-In Supervision Monitoring: Detects open-circuit and short-circuit faults on any output terminal. Fault detection is hardwired; no software polling or network dependency. Pair with a security panel or integrator system that monitors the supervision signal for automated alerting on loss of power to any protected device.
- Lifetime Limited Warranty: Covers defects in materials and workmanship for the life of the product under normal use — standard coverage from Altronix that reflects confidence in supply reliability for multi-year deployments.
Integration & Compatibility
The SMP10PM24P16 integrates into any security architecture requiring 24VDC power distribution: access control systems, IP camera and sensor backups, fire alarm circuits, and emergency lighting. Each supervised output connects to a dedicated load via screw-down terminals — no proprietary connectors, no special tools. Wire gauge for output circuits depends on load and run distance; typical deployments use 18–14 AWG for readers and sensors, 12–10 AWG for heavier loads like magnetic locks. The supervision signal (open/closed loop) connects to a panel input to report faults in real time.
Because supervision is per-output, you gain granular visibility into which devices lost power — a significant advantage in large installations where a single generic "power failure" alarm is useless for troubleshooting. Integrators often use the SMP10PM24P16 alongside access control panels that natively accept supervised output signals, eliminating the need for external monitoring relays.
Typical Deployment Scenarios
- Multi-Reader Access Control: Distribute 24VDC to 12–16 proximity or card readers across a facility with supervision on each reader's power branch. Instant alert if a reader loses power due to wire damage, loose terminal, or device failure.
- Mixed Security Camera and Sensor Power: Back up a subset of IP cameras and door sensors with supervised 24VDC when PoE bandwidth is limited. Supervision ensures cameras and sensors stay provisioned without manual circuit checks.
- Fire Alarm and Emergency Lighting Support: Provide clean regulated 24VDC to fire system batteries, notification appliances, and emergency exit signs with per-circuit supervision to meet code inspection requirements.
- Distributed Outdoor Access Gates: Power remote gate readers, magnetic locks, and sensors at multiple entry points from a centralized supply. Supervision alerts you immediately if an outdoor weather exposure or vandalism cuts a wired circuit.
Frequently Asked Questions
Q: Can I use the SMP10PM24P16 to back up IP cameras on PoE switches?
A: Not directly. IP cameras on PoE switches get power and data on the same cable. The SMP10PM24P16 supplies 24VDC via separate wires; it does not carry Ethernet. If your cameras have hardwired 24VDC backup power inputs (in addition to PoE), yes — but most modern IP cameras do not. This supply is better suited for non-networked devices: readers, locks, motion sensors, and legacy analog cameras with 24VDC inputs.
Q: What happens if one output exceeds 10A total?
A: The SMP10PM24P16 has a 10A total capacity across all 16 outputs. If aggregate load exceeds 10A, voltage will drop and the supply may shut down. Each output is supervised separately, but there is no per-output current limit — load planning must respect the total 10A ceiling. Distribute loads evenly and calculate peak inrush current (e.g., solenoid locks engage simultaneously) during design.
Q: Does the SMP10PM24P16 work with my fire alarm panel?
A: Yes, if your fire alarm panel accepts supervised 24VDC power and can monitor open/closed loop supervision signals. Check your panel's manual for input specifications. The SMP10PM24P16 supervision output is a dry contact or current loop depending on load state — compatible with most commercial fire and security panels.
Q: What's the difference between this and an unsupervised 24VDC supply?
A: An unsupervised supply provides 24VDC but offers no fault detection — if a wire breaks or device disconnects, you won't know until someone reports a reader not working. The SMP10PM24P16 supervision circuit detects that fault and sends a signal to your panel or monitoring station, enabling proactive response and faster troubleshooting.
Q: Can I daisy-chain multiple SMP10PM24P16 units for more current?
A: Do not parallel the units directly — risk of current fighting and supply damage. Instead, use separate SMP10PM24P16 units on isolated branches of your load, each with its own 115VAC input and supervision circuit. Consult an integrator if you need to scale capacity beyond one unit.
Ted PerryPerspective based on aggregated IP Security Depot and affiliated engineering team experience.
The Altronix SMP10PM24P16 solves a real problem in mid-scale access control and distributed security deployments: how to monitor power delivery to dozens of 24VDC devices without adding a separate relay board or hardwired fault panel. I've installed dozens of these in warehouse and office complexes where a single cut wire to a door reader used to mean a service call and downtime. The per-output supervision changes that equation — you get actionable fault data on 16 independent circuits from one unit.
Technical Highlights:
- 16 Supervised Outputs on 10A Budget: Averages 625 mA per output if evenly distributed, which fits most access readers and low-power sensors comfortably. The supervision architecture means one shorted output doesn't kill the other 15 — isolation is passive, so a short-circuit on terminal 7 doesn't affect terminal 8.
- 24VDC Regulation Under Dynamic Load: The regulated output holds voltage even as aggregate load swings. Unregulated supplies sag when load increases; sagging voltage makes readers flaky or fail authentication. Regulation here is non-negotiable for reliable credential reads, especially if your readers are more than 100 feet from the supply.
- 115VAC Single-Phase Input Simplicity: You're not hunting for a 208V three-phase circuit in a small facility. Standard wall-outlet input means faster installation and fewer site-survey surprises. Input isolation also suppresses ground loops that can introduce noise into low-voltage control signals — matters when running reader wiring alongside AC power.
Deployment Considerations:
- Load Planning is Non-Optional: 10A across 16 outputs is tight if you have heavy solenoid locks (which can draw 2–3A during strike). Calculate peak inrush current when multiple devices energize simultaneously — a magnetic lock pull-in can spike 4–5A for 500 ms. If you have more than three locks or high-current devices, you may need two SMP10PM24P16 units on separate circuits.
- Supervision Wiring Adds a Run: Each supervised output generates a fault signal that must return to your panel. That's an extra pair of wires (or dry contact circuit) per output if your integrator opts for individual monitoring. For 16 outputs, expect a heavier terminal block footprint in your cabinet than a basic unmonitored supply. Plan cable management accordingly.
- Integration Depends on Panel Compatibility: The SMP10PM24P16 is a dumb supply — it detects faults but doesn't report them to a cloud service or send an email. You need a physical panel with inputs to receive the supervision signal. If you're building a fully networked access system with no hardwired panel, this unit's supervision feature is wasted. Consider a basic unmonitored 24VDC supply instead.
The SMP10PM24P16 is the right pick for warehouse access, small retail chains, and office buildings with distributed readers and sensors where downtime costs real money and you want granular visibility into power faults. Pair it with a security panel that monitors the supervision outputs and you've eliminated a common failure mode: cut wires and loose terminals going unnoticed for weeks. Not suitable for high-current solenoid-heavy installations — that's where you step up to a heavier-duty industrial supply.
