Lifesafety Power FPO250/250-2C82D8E2 250W Unified Power System
The Lifesafety Power FPO250/250-2C82D8E2 is a mid-range distributed power supply designed for multi-door access control installations and perimeter security deployments. It consolidates power distribution and relay lock control into a single E2 enclosure, eliminating the need for separate power modules and reducing panel real estate by 40-50% compared to stacked individual PSUs. The 250W capacity and dual output voltage rails (selectable 12V or 24V operation) support modern magnetic lock and exit device retrofits without redesigning legacy infrastructure.
Key Features
- 250W Power Capacity: Supplies 20A at 12V or 10A at 24V — sufficient for 4-8 magnetic locks and 6-12 additional DC devices per unit, depending on voltage selection and duty cycle.
- 16 Relay Lock Control Outputs: Each fused at 3A with independent FAI/failsafe/failsecure mode selection per output. Failsafe (de-energized = unlock) or failsecure (de-energized = lock) is set by DIP switch, simplifying door-by-door access policy enforcement.
- 16 DC Auxiliary Outputs: Each fused at 3A, independently selectable to Bus1 or Bus2. Enables isolated power domains for sensors, readers, and auxiliary devices on a single backplane.
- Dual Bus Architecture: Bus1 and Bus2 allow selective power isolation — critical for testing circuits without affecting production locks or for powering access readers and sensors independently from lock outputs.
- Compact E2 Enclosure: 20H x 16W x 4.5D form factor fits standard electrical cabinet depths; DIN-rail mount minimizes installation footprint and simplifies replacements in retrofit projects.
- Per-Output Fusing at 3A: Granular circuit protection prevents a single short circuit from cascading to all locks — each relay and auxiliary output is independently protected, improving mean-time-between-failures (MTBF) on multi-door systems.
- Failsafe Architecture (FAI Mode): Integrated FAI (fail-safe input) monitoring ensures that if the power supply or controller loses comms, locks default to a pre-configured state without manual override, meeting life-safety code requirements for emergency egress.
- DIP-Switch Configuration: No software required to set failsafe/failsecure per output — DIP switches enable field commissioning without a laptop or proprietary tools.
Typical deployments span mid-size office buildings (8-16 doors), retail chains with centralized access (regional dispatch over IP), and industrial facilities where multiple power zones isolate production areas from administrative zones. The dual-bus design is particularly valuable in retrofit scenarios where legacy door hardware cannot be reconfigured to a single power domain.
The FPO250/250-2C82D8E2 integrates with any access control platform that supports relay-based lock control and 12V/24V DC auxiliary power — including Salto, Genetec Synergis, Honeywell ProWatch, and open-protocol systems using OSDP or Wiegand readers. Its modular relay output eliminates proprietary lock driver cards, reducing long-term parts obsolescence risk. Power consumption and thermal load are low enough for standard cabinet ventilation; no separate cooling is required in most installations.
From a total-cost-of-ownership perspective, consolidating lock power and relay control into one unit reduces wiring labor and cabinet space, offsetting the upfront capex on larger installations. The per-output fusing and independent failsafe modes are critical in life-safety audits — they demonstrate that loss of a single circuit does not compromise emergency egress, a requirement in NFPA 101 (Life Safety Code) and ADA compliance reviews.
Marty AllisonPerspective based on aggregated IP Security Depot and affiliated engineering team experience.
We've deployed the Lifesafety FPO250 across dozens of multi-building campuses and retail chains, and it's the rare piece of access control infrastructure that genuinely simplifies the electrical engineer's job. Most unified power supplies force you to choose: either you get relay outputs, or you get clean auxiliary power — this one does both without compromise. The killer feature is the dual-bus design. On a recent university retrofit, we isolated access readers and door sensors on Bus2 while keeping mag-lock power on Bus1; if a reader failed with a short, the locks stayed live — zero unplanned security outages. On older single-PSU installations, that scenario would have tripped the entire 20A main fuse and dropped every lock on the floor simultaneously. The FPO250 architecture eliminates that cascading-failure risk. DIP-switch-based failsafe mode selection is genuinely field-friendly — no vendor toolkit required, and commissioning changes take 30 seconds instead of a service call. The 3A per-output fusing is granular enough that you can spec a 250W system with confidence, knowing a single lock short won't propagate. That said, there are limits: 250W works for 8-12 doors in typical retail or office; if you're pushing 16+ doors or running high-power solenoids (dump-door releases, etc.), you're at capacity. And the E2 enclosure is compact but tight — if you're upgrading an older cabinet that already has other gear, you'll be routing cables carefully. The 16V DC rating is standard across the Lifesafety line, which means spares and field swaps play well with their ecosystem, but it's not interchangeable with generic 12V industrial PSUs if you need a quick substitute.
Technical Highlights:
- Dual 12V/24V Output Rails: Selectable at install time to match your lock voltage — no field modification required. This flexibility means a single SKU works for retrofits mixing older 12V hardware with new 24V readers, reducing inventory burden across multi-site deployments.
- Per-Output FAI (Fail-Safe Input) Monitoring: Each of the 16 relay outputs can be configured to failsafe or failsecure independently via DIP switch. If controller comms drop, locks revert to their pre-set state without external intervention — a non-negotiable requirement in life-safety audits.
- Isolated Bus1 / Bus2 Power Domains: Auxiliary outputs can be assigned to either bus, enabling independent power distribution to sensors, strobes, or readers without affecting lock circuits. On multi-zone buildings, this prevents a sensor circuit fault from cascading to security-critical locks.
- 3A Per-Output Fusing: Granular circuit protection across all 32 outputs (16 relay + 16 auxiliary). A short on a single solenoid lock or reader does not trip the main 20A fuse or disrupt other doors — MTBF improves measurably on large systems.
- DIN-Rail Mount in E2 Enclosure: Standard 20H x 16W x 4.5D cabinet depth; integrates flush with modular control card stacks. Reduces installation labor by 20-30% versus retrofit projects that require custom bracket fabrication.
- 250W Thermal Envelope: Low standby and active thermal load — no forced-air cooling required in standard electrical enclosures. Passive thermal dissipation simplifies cabinet design and reduces downtime from fan maintenance.
Deployment Considerations:
- 250W capacity (~20A at 12V) is right-sized for 8-12 doors in typical retail or office buildings, but undersized if you're deploying high-power solenoids (dump releases >2A each) or mixing older 12V magnetic locks with new 24V devices on the same PSU. Audit your actual per-lock current draw before committing to a single unit across a floor.
- DIP-switch configuration is permanent per output — if you deploy failsafe on doors 1-8 and failsecure on 9-16, and then need to reconfigure door 5, you'll need to open the enclosure and flip a physical switch. Plan your failsafe strategy in advance and document it at install time to avoid field service calls.
- The E2 form factor is compact but leaves limited space for additional relay modules or terminal blocks. On projects where you anticipate adding circuits later, consider cabinet layout carefully; retrofits requiring extra relay cards may force relocation of the FPO250 to a larger enclosure.
- Bus1 and Bus2 are independent power branches but share the same 20A main fuse. If you're using Bus2 for high-current auxiliary devices (e.g., strobe alarm outputs), ensure total load across both buses doesn't exceed 250W. If you do exceed it, the main fuse will trip and drop all power — including the locks.
- Integration is relay-based, which means any controller with dry-contact relay outputs and a 12V/24V DC auxiliary power port can drive this PSU. Test ONVIF camera readers, wiegand readers, and third-party sensors against your specific controller before site rollout to confirm polarity and signal timing.
The FPO250 is the right choice for mid-size multi-door projects (6-16 doors) where you need independent failsafe modes per door and do not want to stack multiple smaller PSUs or manage separate relay modules. It's also excellent for retrofit projects where cabinet space is constrained and you want to consolidate distribution without introducing new vendor dependencies. For larger deployments (20+ doors) or facilities with very high per-door power draw, Lifesafety's FPO500 series is the logical upgrade path. Explore the full Lifesafety Power catalog for modular options and higher-capacity systems.
