Altronix AL1024ULXPD4 24VDC 10A 4-Output Power Supply

Altronix AL1024ULXPD4 24VDC Power Supply with Battery Backup

The AL1024ULXPD4 is a four-output 24VDC power supply designed for distributed power delivery in security and access control installations. It accepts 115VAC input and delivers regulated 24VDC across four independently fused outputs, each capable of handling loads independently. This isolation means a fault or overcurrent on one output won't starve the others—critical in multi-zone access control or camera deployments where downtime cascades.

Key Features

• 8A maximum output current at 24VDC: Sufficient to power multiple intermediate-load devices (card readers, mag locks, PTZ cameras, or small LED lighting circuits) without requiring distribution to a secondary supply. The 10A nominal rating provides headroom; actual peak delivery is 8A.
• Four independently fused outputs: Each output has its own fuse protection, isolating faults to a single circuit. If a door strike locks up or a camera short-circuits one output, the other three remain powered. This architecture is standard in professional installations where single-point failures are unacceptable.
• Integrated battery backup and charger: Automatically maintains and charges a connected battery (type and capacity determined by your application). During AC loss, the supply switches to battery, providing holdover time for access control systems to revert to fail-safe states or allow orderly shutdown.
• AC Fail supervision alert: Signals when mains power is lost, enabling downstream controllers to log events or trigger contingency logic. Essential for compliance monitoring in facilities where power loss must be documented.
• Low Battery and Battery Presence supervision: Alerts you to a depleted or missing battery before a real AC failure leaves you stranded. Prevents surprises during emergency egress or security events.
• Compact BC400 enclosure form factor: Fits into tight equipment racks or wall-mount panels without consuming excessive cabinet space. Standard Altronix form factor—integrates with other modules in the power-distribution family.

Integration & Compatibility

The AL1024ULXPD4 works as a standalone 24VDC backbone in any security or building automation system requiring hardwired DC power. Supervision outputs (AC Fail, Low Battery, Battery Presence) are dry-contact or relay-driven, compatible with generic access control panels, fire-alarm interfaces, or legacy BMS systems that monitor power-distribution health. Output voltage is fixed at 24VDC; if you need 12VDC or 48VDC, you'll need a different power supply model from the Altronix portfolio.

Pair this supply with compatible access control power supplies and distribution modules to scale across multiple zones. The 115VAC input is North American standard; if your facility runs 230VAC, verify input compatibility before ordering.

When to Choose a Different Model

If you need higher current capacity—say, powering a large field of card readers or numerous mag locks—consider a higher-amperage variant in the Altronix AL10 series. If your installation requires redundant AC inputs or isolated battery-backup monitoring, Altronix offers modular solutions that stack or integrate with this unit. For single-zone, low-power applications (e.g., a single access reader), a smaller 24VDC supply may be overkill and add unnecessary cost.

Frequently Asked Questions

Q: What type and capacity of battery should I connect to the AL1024ULXPD4?

A: The supply is designed to charge and supervise a sealed lead-acid or lithium battery. Capacity depends on your hold-up time requirement. The datasheet specifies charge rates and voltage thresholds; consult Altronix application notes or your system integrator to size the battery for your load and desired runtime.

Q: Can I daisy-chain multiple AL1024ULXPD4 units for redundancy?

A: The unit is not designed for parallel output. For redundant 24VDC distribution, use Altronix power-distribution modules with integrated diode isolation or isolated outputs. A qualified integrator can design a redundant architecture using separate supplies and switching logic.

Q: What is the warranty on the AL1024ULXPD4?

A: Altronix provides a Lifetime Limited Warranty covering defects in materials and workmanship. Warranty terms apply to original end-user registration; batteries are typically excluded.

Q: Is the AL1024ULXPD4 compatible with my fire-alarm panel's power-monitoring input?

A: Yes, the AC Fail supervision output is a dry contact or relay-driven signal that can integrate into most panel alarm inputs. Confirm your panel's input voltage and contact rating with your installer.

Q: Can I use the AL1024ULXPD4 outdoors?

A: No. The BC400 enclosure is rated for indoor use only. For outdoor or wet-location power distribution, use an Altronix outdoor-rated supply in a weatherproof enclosure.

Ted Perry

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

The AL1024ULXPD4 is a workhorse for any access control or distributed security deployment that can't tolerate a single point of power failure. The 8A output capacity and four isolated fused channels make this unit a smart choice for mid-scale installations—it's powerful enough to avoid cascading secondary supplies, yet compact enough to fit into existing cabinet layouts.

Technical Highlights:

• Four independently fused 24VDC outputs: Fault isolation on one output doesn't collapse the others. In a 10-door access control system, a shorted mag lock on door 3 won't silence the readers on doors 1, 2, 4, and beyond.
• 8A maximum at 24VDC: Covers typical payloads—multiple card readers (2–3W each), mag locks (5–10W), PTZ camera (up to 30W depending on model), or a mix. If you're powering heavy-draw equipment (industrial solenoids, LED panels), validate your load math against the 8A ceiling.
• Built-in battery supervision: AC Fail, Low Battery, and Battery Presence signals feed directly into your control panel's alarm input. You'll see a power-loss event logged in real time, not discovered during the next morning's system check.

Deployment Considerations:

• Battery type and size are NOT specified in the unit; you buy and size the battery separately. This is both a strength (flexibility) and a gotcha (no plug-and-play battery included). Consult an integrator if you're unsure of battery selection.
• 115VAC input only. If your facility runs 230VAC mains, this unit won't work without a step-down transformer—an added cost and complexity.
• The BC400 form factor is a tight fit in some older cabinets. Measure your mounting space before purchasing.

Best suited for multi-zone access control installations, small-scale camera power hubs, and facilities where supervised power distribution is required by code or security policy. Not the choice for single-reader deployments or outdoor power delivery.