Altronix LPD7 Low Power Disconnect Module
Overview
The Altronix LPD7 is a compact low power disconnect module designed to protect battery-backed power supplies and load circuits when supply voltage drops below safe operating levels. Rated for 12VDC or 24VDC systems at up to 8A, it cuts power to downstream devices before low-voltage conditions can damage batteries or cause erratic equipment behavior — then automatically restores the circuit once voltage recovers to a safe threshold. At just 2"W × 2.75"L × 1"H and 0.12 lbs., the LPD7 drops into virtually any enclosure or panel where space is tight.
The module belongs to Altronix's Altronix power management line, which covers a broad range of security power supplies and ancillary protection components for commercial surveillance and access control installations.
Key Features
- Dual-voltage operation (12VDC / 24VDC, 8A max): A single module covers both the 12V and 24V power supplies common in IP camera and access control installations. You don't need separate SKUs for each voltage tier on a mixed-voltage project.
- Low voltage cutoff — 10.5V (12VDC systems) / 20V (24VDC systems): The LPD7 disconnects the load before battery voltage drops to a level that can permanently shorten battery life or cause cameras and controllers to reset unpredictably. The ±0.3V tolerance keeps the threshold tight enough to matter without nuisance tripping on normal transients.
- Automatic restore threshold — 11.5V (12VDC) / 23V (24VDC): Once the supply recovers to the restore voltage, the relay closes and the load comes back online without any manual intervention. For unmanned remote sites or locked utility rooms, that self-healing behavior is operationally significant — no truck roll needed to reset a tripped module.
- Relay contact rating 8A max: The on-board relay handles the full 8A input rating, so you're not trading current capacity between the protection circuit and the load circuit. Size the downstream load to 8A or less and the relay is never the bottleneck.
- Adjustable threshold for added flexibility: The disconnect threshold is field-adjustable, which matters when you're protecting battery chemistries (sealed lead-acid vs. gel vs. AGM) that have different safe discharge floors. A one-size voltage cutoff rarely fits every battery type.
- Compact 2" × 2.75" × 1" footprint: Fits inside standard Altronix enclosures alongside the power supply it protects, rather than requiring a separate housing. The 0.12 lb. product weight means it doesn't add meaningful load to a wall-mount enclosure.
- Lifetime warranty: Altronix backs the LPD7 with a lifetime manufacturer warranty — a meaningful commitment for a protection component that typically lives inside a sealed enclosure and is only noticed when something goes wrong.
Integration and Compatibility
The LPD7 is designed as an add-on module for any power supply rated up to 8A. It connects in-line between the power supply output and the load, making it supply-agnostic — it works with Altronix supplies as well as third-party units in the same voltage range. For system designers specifying NVR-based or hybrid DVR systems with local battery backup, adding the LPD7 protects both the recording equipment and the battery string from deep-discharge events during extended outages.
Because the module operates purely on voltage thresholds — no microcontroller, no firmware — there are no compatibility, update, or cybersecurity considerations. Installation requires only wiring the input and output terminals; no programming or configuration software is needed beyond the threshold adjustment.
For projects requiring PoE or multi-output power distribution, the LPD7 can protect the primary input feed to a distribution hub, ensuring the entire downstream port array disconnects cleanly before battery voltage collapses rather than allowing partial or corrupted operation.
Frequently Asked Questions
Q: What is the low voltage cutoff point for a 12VDC system?
A: The LPD7 disconnects the load at 10.5V (±0.3V) on a 12VDC system. The circuit restores automatically when voltage recovers to 11.5V (±0.3V).
Q: Can the LPD7 be used with a 24VDC power supply?
A: Yes. The LPD7 supports both 12VDC and 24VDC inputs up to 8A. On a 24VDC system, it disconnects at 20V and restores at 23V.
Q: Does the LPD7 require any programming or configuration software?
A: No. The LPD7 operates entirely on hardware voltage thresholds. The disconnect threshold is field-adjustable mechanically — no firmware, no software, no network connection required.
Q: What is the maximum current the LPD7 can handle?
A: The input and relay contact rating are both 8A max. Size your downstream load to 8A or less to stay within spec.
Q: What warranty does the LPD7 carry?
A: Altronix backs the LPD7 with a lifetime manufacturer warranty.
Q: What are the physical dimensions of the LPD7?
A: The LPD7 measures 2"W × 2.75"L × 1"H and weighs 0.12 lbs., making it easy to mount inside standard security enclosures alongside a power supply.
