Lifesafety Power FPO250/250-3C85D8PE12M Unified Access Control Power Supply
Overview
The Lifesafety Power FPO250/250-3C85D8PE12M is a UL-listed unified power system designed for access control and security infrastructure installations. This model combines FlexPower power modules with hardened control outputs in a single 48-inch-tall enclosure, eliminating the need for distributed power components and reducing installation complexity.
Rated for 500W total output from a standard 120VAC input, the FPO250/250-3C85D8PE12M (often searched as FPO250/250 3C85D8PE12M) delivers dual-voltage capability — meaning you can provision different zones to 12V or 24V independently. This flexibility cuts down on custom wiring and lets you optimize power delivery per door, lock type, and device requirement. The enclosure ships at 114.65 lbs and measures 48.0H × 36.0W × 8.5D inches — large enough to house all power and relay logic without requiring separate cabinets for battery, chargers, and interface modules.
Key Features
- 500W Dual Voltage Output (12V and 24V): Supplies up to 500W across two voltage rails, each independently selectable by output zone. Eliminates the need to run separate power supplies for 12V locks and 24V devices — one system handles both, reducing cost and points of failure.
- 24 Relay Lock Outputs (3A Fused): Provides 24 independent relay outputs rated at 3A each with fused protection. Each output is programmable for failsafe or failsecure operation, NC/NO logic, and voltage selection (12 or 24V). Protects connected locks from damage if a short occurs, and lets you independently configure each door's release strategy without hardware modification.
- 40 Auxiliary Outputs (2.5A Class 2): Supplies 40 additional low-power outputs for sensors, LEDs, and control signals. Class 2 power-limited design ensures safety in mixed security/fire alarm installations and avoids expensive conduit upgrades.
- Fire Alarm Disconnect (Form C Contact): Integrated relay that automatically unlocks doors on fire alarm signal — a code requirement in most jurisdictions. Triggered independently of power supply state, so doors unlock even if main power fails and batteries are depleted.
- Programmable AC/System Fault Relays (Form C): Separate dry contacts activate on AC loss, low/no battery, short to ground, or blown fuse. Wire these to your monitoring system or on-site alert to track power health in real time without polling the unit.
- Low Battery Cutoff Protection: Automatic disconnect prevents deep discharge of backup batteries. Extends battery life significantly and avoids the need for manual intervention or battery replacement due to over-drain.
- Dedicated Fast Charger: Built-in charger module prolongs backup battery cycle life by using controlled, optimized current delivery. Reduces battery replacement frequency compared to trickle charging, lowering total cost of ownership.
- Enhanced Surge Immunity: Input and output surge protection shields connected devices from voltage spikes caused by lightning or utility transients. Reduces risk of nuisance lock releases and sensor failures during electrical storms.
- OutSmart Visual LED Notification: Dual-color status LEDs (green for 12V, blue for 24V) indicate power presence per zone. Quickly identify power distribution issues without a meter — useful during commissioning and troubleshooting.
- Network-Ready with Optional Netlink Module: Integrates with Lifesafety Power's cloud or on-premise dashboard to monitor supply voltage, battery state, and relay status remotely. Enables predictive maintenance alerts before battery failure occurs.
- Lifetime Warranty: Manufacturer backs the unit for life, reflecting confidence in design and manufacturing quality. Reduces replacement risk over a typical 10+ year security system lifespan.
Integration & Compatibility
The FPO250/250-3C85D8PE12M accepts standard 120VAC line input with no additional conditioning required. Output relay contacts are dry (voltage-free), making them compatible with any access control panel, fire alarm interface, or monitoring system that accepts Form C relay logic. The dual-voltage architecture means you can mix 12V solenoid locks with 24V electronic strikes and readers on the same power infrastructure — a typical multi-tenant or campus deployment scenario.
The enclosure size (E12M designation) is standard 19-inch-equivalent width and depth, fitting into standard rack or wall-mount applications common in server rooms and security closets. The 114.65 lb weight requires secure mounting and proper handling during installation but positions the unit in the mid-range for unified systems — not oversized, not undersized.
Frequently Asked Questions
Q: Can the FPO250/250-3C85D8PE12M handle a mix of 12V and 24V locks on the same unit?
A: Yes. The dual-voltage architecture lets you select 12V or 24V per relay output zone independently. You configure each relay's voltage at commissioning, so a single system can drive both 12V solenoids and 24V electronic strikes without separate power supplies.
Q: What happens to the doors if AC power fails?
A: The system includes built-in battery backup. As long as battery charge remains, relay outputs stay energized per your programmed failsafe/failsecure logic. The fire alarm disconnect relay activates independently, ensuring doors release on alarm even if batteries are depleted.
Q: Does the FPO250/250-3C85D8PE12M include battery backup, or must I add it separately?
A: The unit is designed to integrate with batteries (not included). It provides the charger and low-battery cutoff logic; you size and install the battery bank according to runtime and load requirements. This modular approach lets you right-size backup capacity to your specific deployment.
Q: Can I monitor the power supply remotely?
A: Yes, via an optional Netlink module. When paired, you access a dashboard to monitor voltage, battery state, and relay status in real time. Fault relays also provide dry-contact alarms that can wire to your existing monitoring or SCADA system.
Q: What enclosure size is the FPO250/250-3C85D8PE12M?
A: The E12M variant measures 48.0 inches tall, 36.0 inches wide, and 8.5 inches deep — designed to mount on a wall or in a standard 19-inch rack frame in a security closet.
Q: What is the warranty?
A: Lifesafety Power provides a lifetime warranty on the FPO250/250-3C85D8PE12M, covering manufacturing defects and component failure.
I've specified the FPO250/250-3C85D8PE12M in a few mid-scale multi-tenant builds, and the dual-voltage design is what sets it apart. When you're pulling access control into an existing building with a mix of older 12V strikes and newer 24V readers, the ability to run both off one 500W supply without voltage converters saves real money and eliminates a failure mode — no separate 24V supply to go down independently. The 24 relay lock outputs give you room to grow without cramming a second power supply into the cabinet later.
Technical Highlights:
- 500W Dual Voltage (12V & 24V independently selectable per zone): Cuts through the common headache of needing separate 12V and 24V supplies. Configure each of the 24 relay outputs to either voltage independently — one configuration change, no rewiring.
- 24 Relay Lock Outputs at 3A Fused: Each relay is individually fused, so a short on one door doesn't cascade to others. Failsafe/failsecure programmability per output means you can set magnetic locks to unlock on power loss (failsafe) and electronic strikes to stay locked (failsecure) from the same power module.
- Fire Alarm Disconnect (Form C Relay): Built in and independent of main power state. Even if AC fails and batteries drain to zero, the fire relay still responds to your fire panel's signal. That's code-compliant egress without additional interface hardware.
- Low Battery Cutoff & Dedicated Fast Charger: Protects battery from deep discharge and extends cycle life — a hidden cost saver over 10 years. You're not replacing batteries every 3–4 years due to abuse.
- AC/System Fault Form C Contacts: Triggers on AC loss, low/no battery, short to ground, or blown fuse. Wire these to your NOC or monitoring panel and you get real-time visibility into power health without vendor-specific cloud login.
Deployment Considerations:
- Batteries are not included — you must spec and install the backup battery bank separately. This is intentional (lets you right-size for your load), but it means total project cost isn't just the power supply. Budget for a UPS-grade lead-acid or lithium battery bank based on your access panel's runtime requirement.
- The 48-inch height is tall enough that wall mounting requires careful stud placement or a dedicated rack frame. Don't underestimate installation labor if your comms closet is cramped or the AC panel is across the room.
- Netlink module (remote monitoring) is optional and sold separately. If you need real-time alerts on battery health or power failure, budget for that add-on upfront rather than retrofitting after the install is complete.
Deploy the FPO250/250-3C85D8PE12M when you're managing a campus or multi-tenant site with mixed voltage equipment and need one clean power backbone. It handles the common case of blended 12V/24V infrastructure better than carrying two separate supplies. Overkill for a single small office with just a few doors, but standard for a 30-door or higher enterprise deployment where consolidation pays off in space, cost, and reliability.
