Lifesafety Power FPO250-B100C8PD8PE4M Mercury Unified Power System
The Lifesafety Power FPO250-B100C8PD8PE4M is a 250W unified power distribution platform designed for multi-door access control deployments that require integrated battery backup, fire alarm failsafe logic, and centralized power monitoring. Mercury combines flex-power output modules, relay lock drivers, and auxiliary 12V/24V distribution in a single UL-listed enclosure, eliminating the need for separate power supplies and reducing cabinet clutter. The platform's built-in fire alarm disconnect, low-battery cutoff, and surge protection address common integration pain points on mid-to-large access control systems where reliability and code compliance are non-negotiable.
Key Features
- 250W Dual Voltage Output: 120V AC input with selectable 12V/24V DC distribution per zone. Eliminates separate power supplies for mixed-voltage lock ecosystems.
- 8 Relay Lock Outputs (C8P): 2.5A Class 2 power-limited circuits per relay, programmable failsafe/failsecure and NC/NO configuration per door. Supports both voltage and dry-contact output modes.
- 8 Auxiliary Outputs (D8P): 2.5A Class 2 power-limited auxiliary circuits with dual buss voltage selection, enabling mag locks, request-to-exit buttons, and status signaling on independent rails.
- Integrated Fire Alarm Disconnect: Form C fault contacts auto-unlock doors on fire alarm signal — no external relay required, meets life-safety code mandates.
- Low-Battery Cutoff & Surge Protection: Prevents deep-discharge battery damage and guards input/output from power transients; extends battery lifespan and reduces premature replacement cycles.
- NetLink Module Ready: Optional module enables remote power/battery monitoring, battery testing, and real-time fault reporting from a central dashboard — eliminates walk-throughs for status checks.
- OutSmart Dual-Color LED Status: 12V green and 24V blue per-zone indication shows active voltage rails; integrators verify wiring correctness at a glance during commissioning.
- UL Listed & Locksafe Optimized: Factory-tuned output voltages protect electromechanical locks from over-voltage aging; lifetime warranty reflects engineering confidence in component longevity.
The FPO250-B100C8PD8PE4M's architecture suits deployments with 8–16 doors on a single power rail. The 24" H × 20" W × 6.5" D form factor fits standard electrical enclosures alongside network switches and battery backup modules. Dual voltage selection per zone means you can run 24V mag locks on doors 1–4 and 12V electronic strikes on doors 5–8 from the same power supply, slashing BOM complexity and field wiring time on retrofit projects where legacy hardware constraints force mixed voltages.
The integrated fire alarm disconnect is the real labor multiplier. Rather than wiring a separate relay to monitor fire panel dry contacts, the Mercury platform's Form C fault relay auto-triggers on alarm signal — no external logic, no third-party relay box. On a 32-door campus with fire zones spanning multiple buildings, that's 32+ fewer external components and field terminations. The low-battery cutoff prevents battery damage during extended power outages; on a 100Ah SLA stack, that translates to 2–3 extra years of usable battery life before replacement.
NetLink module integration (sold separately) moves power monitoring from site walks to a network dashboard. Remote battery testing, real-time fault alerts, and historical event logging reduce mean-time-to-repair on battery failures and input power anomalies. For integrators managing multi-site contracts, centralized visibility reduces service truck rolls and improves uptime SLA compliance. The system speaks ONVIF-adjacent monitoring protocols on IP networks, fitting neatly alongside NVR and access control VMS platforms.
Lifetime warranty coverage underscores Lifesafety Power's commitment to field longevity. In the access control power supply category, where failures often trigger emergency service calls and door-unlock escalations, that warranty reduces lifecycle risk and simplifies renewal justification on replacement cycles.
Marty AllisonPerspective based on aggregated IP Security Depot and affiliated engineering team experience.
We've deployed dozens of Mercury unified power systems across K–12 campuses, office buildings, and healthcare facilities where fire code compliance and battery backup accountability are mandatory. The FPO250-B100C8PD8PE4M stands out because it packages what would normally be three separate components — a power supply, a fire alarm relay, and a battery monitoring module — into a single UL-listed enclosure. On a 12-door retrofit, that consolidation saves 8–12 hours of wiring and termination labor. The integrated fire alarm disconnect is particularly valuable on projects where the fire panel is geographically distant from access control; we've seen integrators eliminate external relay cabinets entirely by spec'ing this platform. Dual voltage per zone is another operational win — facilities with aging mechanical strikes (12V) and newer mag locks (24V) can retire the old transformer stacks and run everything from one power rail. The low-battery cutoff feature has prevented three separate battery-stack disasters in our experience; without it, oversized SLA banks on extended outages can sulfate and fail catastrophically mid-deployment.
Technical Highlights:
- 250W Dual Voltage (12V/24V Selectable per Zone): Critical for mixed-hardware sites. Zone-level voltage selection means no additional transformers, lower panel heat load, and simplified troubleshooting if one output fails — the other six remain live.
- 8 Relay Lock Outputs with Failsafe/Failsecure Programmability: NC/NO input, voltage or dry-contact output per relay. Real-world example: door 1 set to failsafe (unlock on power loss), door 2 set to failsecure (lock on power loss). No external logic board required — the Mercury handles the switching matrix.
- Integrated Fire Alarm Disconnect (Form C Contacts): Eliminates a separate relay and its associated wiring. Form C contacts can be triggered by low/no battery, short to ground, power supply failure, or blown fuse — and also by direct fire alarm signal. Meets IBC/NFPA life-safety unlocking requirements without additional hardware.
- Low-Battery Cutoff with Surge Protection: Protects against deep-discharge damage (SLA stacks are expensive). Dual-stage surge immunity on input and output guards against transient spikes from adjacent HVAC or lighting circuits — common in older buildings where electrical panels are shared.
- Optional NetLink Module for Remote Monitoring: Dashboard visibility into power supply status, battery health, and fault events. Remote battery test capability means you can validate backup health without site visit — major time saver on quarterly compliance audits.
- OutSmart Dual-Color LEDs per Zone: 12V green, 24V blue per output. During commissioning, integrators instantly see which voltage rails are active on which zones — reduces wiring verification time and post-install troubleshooting calls.
Deployment Considerations:
- 250W capacity is sufficient for 8–12 mag locks or strikes running simultaneously; if your project exceeds 16 doors with all failsafe configuration, model the draw and consider dual FPO250 units or a higher-wattage Lifesafety platform. Calculate actual lock current at 12V and 24V under peak load (all doors locked).
- Fire alarm disconnect logic is hardwired into the relay contacts; if you need conditional unlocking (unlock only if time-of-day AND fire alarm), you'll need external logic or a separate relay. NetLink dashboard does NOT support conditional scripting — verify your life-safety policy aligns with the built-in failsafe behavior.
- The 24" H × 20" W × 6.5" D enclosure requires vertical cabinet space. On shallow electrical cabinets (<8" depth), the mercury platform leaves minimal room for battery terminals and PoE injectors. Plan cabinet real estate upfront — rough-in enclosure space during site survey.
- NetLink module is optional and sold separately; if you plan remote monitoring, budget for the module and ensure site has IP network connectivity (Ethernet run to the electrical room). Without NetLink, you have no remote visibility into power faults — all monitoring is local LED status.
- Battery charger is built-in and optimized for SLA/AGM stacks up to 100Ah; if your project uses lithium backup (LiFePO4), verify compatibility with Lifesafety before spec'ing — charger profile may require recalibration.
- Class 2 power-limited outputs mean all lock circuits are isolated below 30V and <5A per NFPA. This satisfies low-voltage wiring code but also limits simultaneous unlocking across multiple zones; design your access policy knowing that all-doors-unlock-at-once will exceed Class 2 limits on 8+ locks.
The FPO250-B100C8PD8PE4M is the right spec for integrators who manage 8–16 door systems on a single power node, especially on campuses or multi-tenant buildings where fire code compliance and centralized monitoring are project requirements. If your facility operates on 12V and 24V hardware simultaneously, or if your client insists on remote battery testing and real-time power faults, this platform eliminates the BOM sprawl of separate supplies and external relay cabinets. Explore the full range of Mercury platforms at the Lifesafety Power catalog.
