Lifesafety Power FPO250-B1002D8E2 150W Access Control Power Supply
The Lifesafety Power FPO250-B1002D8E2 is a dedicated access control power supply designed for integrated door lock and auxiliary device control in mid-scale deployments. This 150W unit delivers selectable 12V (12A) or 24V (6A) primary output with eight independently fused relay lock control circuits and sixteen class 2 auxiliary outputs, all housed in a compact E6 metal enclosure. The configurable per-output failsafe/failsecure logic and dual-bus auxiliary distribution make it a flexible backbone for systems ranging from 4-door to 8-door installations.
Key Features
- Dual-Voltage Primary Output: Selectable 12V at 12A or 24V at 6A — eliminates the need for separate 12V and 24V supplies in mixed-voltage environments.
- Eight Relay Lock Control Outputs: Each output fused independently at 3A, with per-output failsafe or failsecure selection — accommodates electric strikes, mag locks, and motorized latches on the same circuit board.
- Sixteen Class 2 Auxiliary Outputs: 2.5A per output, distributable across Bus1 or Bus2 — powers request-to-exit buttons, door position switches, motion sensors, and indicator lights without additional relay modules.
- Per-Output Failsafe/Failsecure Configuration: Each lock output independently selectable for fail-safe (unlocked on power loss) or fail-secure (locked on power loss) — critical for mixed-security zones in the same building.
- Compact E6 Enclosure: 30H × 23W × 6.5D inches — mounts in standard electrical cabinets or shallow wall boxes; Mercury MR52 board architecture supports Panduit cable management and eight-door terminal distribution.
- Built-in Mercury Back Plate: Pre-wired Mercury back plate and board layout reduce assembly labor and terminate all lock and auxiliary circuits in a single compact footprint.
- Fused Circuit Protection: All eight lock outputs and sixteen auxiliary outputs individually fused — a single door's short circuit does not cascade to adjacent outputs.
- 16 DC Auxiliary Outputs: Class 2 power-limited at 2.5A per output, configurable for Bus1 or Bus2 isolation — separates high-current lock control from low-current sensor and indicator circuits.
This power supply is purpose-built for access control integrators managing multiple door types and mixed failsafe/failsecure requirements. The eight relay outputs handle electric strikes and mag locks directly; the sixteen auxiliary outputs supply remote request-to-exit stations, door position monitoring, and alarm indicators without daisy-chaining through separate I/O modules. Typical deployments span entrance vestibules, tenant suites, and data centers where per-door fail logic must be configurable without reprogramming the controller.
Integration with access control panels is straightforward — most contemporary controllers (Honeywell, Salto, dormakaba, HID, Assure) interface via relay dry contacts or 12/24V switched outputs. The dual-voltage primary eliminates the need to maintain separate power supplies in facilities that have migrated piecemeal from 12V to 24V lock technology. The Mercury MR52 board supports standard Panduit wiring harnesses, reducing first-install termination time and minimizing field wiring errors.
Compliance and lifecycle considerations: The FPO250 is UL-listed for fire-rated enclosures and meets NFPA 70 Class 2 power-limited distribution requirements. Its modular fused architecture simplifies troubleshooting — if one lock circuit fails, you can isolate it by removing a single 3A fuse without power-cycling the entire supply. Replacement fuses and relay modules are standard industrial stock items, keeping spares and repair costs predictable across multi-site deployments. For facilities requiring redundant power or UPS integration, this unit is typically paired with a battery backup module in the same cabinet footprint.
Marty AllisonPerspective based on aggregated IP Security Depot and affiliated engineering team experience.
The Lifesafety Power FPO250-B1002D8E2 is the workhorse behind hundreds of mid-scale access control deployments we've specified and supported. In our experience, this supply shines in retrofit and mixed-technology environments where you're integrating legacy 12V mag locks alongside newer 24V electric strikes on the same floor or tenant suite. The per-output failsafe/failsecure programmability eliminates the operational headache of managing different power-loss behaviors on different doors — you configure each lock's failure mode at installation and don't revisit it. The eight independently fused relay outputs mean a short circuit on one door (common after water damage or accidental wire-to-frame faults) does not drag down the rest of the system; you simply swap a 3A fuse and restore service to seven other doors in minutes. We've also seen integrators use the sixteen auxiliary outputs to consolidate indicator lighting, door position sensors, and request-to-exit monitoring into a single cabinet — avoiding the cost and footprint of a separate 24V auxiliary distribution panel.
Technical Highlights:
- Selectable 12V/24V Primary Output: The ability to choose 12A/12V or 6A/24V at the supply level (not per-circuit) eliminates the need for separate 12V and 24V units in legacy facilities. Typical eight-door installations drawing 8–10A at 24V run comfortably on the 6A output with headroom for temporary overload.
- Eight 3A-Fused Relay Lock Circuits: Each output is independently fused and rated for direct control of 12/24V solenoid locks. In practice, this prevents cascade failures — a shorted strike on door 3 does not affect the relay or auxiliary outputs on doors 1, 2, 4–8.
- Sixteen Class 2 Auxiliary Outputs at 2.5A Each: Sized for distributed sensor and indicator loads (motion sensors, push buttons, LED status lights, door position switches). The Bus1/Bus2 separation allows you to isolate groups of auxiliary circuits without affecting lock control.
- Compact E6 Enclosure with Mercury MR52 Board: The 30H × 23W × 6.5D footprint fits standard 15-inch or 18-inch electrical cabinet widths. Termination density is high — all eight relay and sixteen auxiliary outputs are hard-wired to the Mercury back plate, eliminating loose field wiring and reducing assembly labor by roughly 3–4 hours per installation.
- Per-Output Failsafe/Failsecure Configuration: Critical for mixed-security zones. A vestibule door might be set fail-secure (locked on power loss), while an interior suite door is fail-safe (unlocked). This granular control is selectable at the relay module level, not at the power supply, so reconfiguration is non-destructive.
Deployment Considerations:
- The FPO250 is not standalone — it requires an access control panel or microcontroller to drive the relay coils and auxiliary circuits. Verify that your controller outputs match the supply's input voltage expectations (typically 12/24V dry contacts or switched outputs).
- The eight relay outputs are rated for resistive lock loads (mag locks, electric strikes). If you're controlling solenoid-driven latches with high inrush current, verify the coil specification against the 3A per-circuit limit, and consider a snubber diode if inrush exceeds 2.5A sustained.
- Class 2 auxiliary circuits are power-limited by design — suitable for sensors, indicators, and light loads, but not for high-current auxiliary loads like 24V cooling fans or heaters. Oversized auxiliary loads require a separate 24V auxiliary supply.
- The Mercury back plate supports standard Panduit DM3000 and DM6000 wiring harnesses. If you're upgrading an existing supply or adding modules, ensure your cabinet has space for the harness strain relief — tight cabinet layouts can pinch wires during installation.
- Fuses are standard 3A and 2.5A automotive-style, stocked at any electrical supply house. Keep spares on-site for rapid restoration if a short occurs on a door circuit.
This supply is the right choice if you're specifying a 4–8 door system with mixed lock technologies and flexible per-door failsafe/failsecure logic. It's also an excellent fit for facilities adding access control to an existing emergency lighting or door position monitoring system, since the sixteen auxiliary outputs absorb that infrastructure without additional cabinets. For multi-building or campus deployments where you need multiple instances, the modular architecture and standard Mercury board interface keep spares and training costs low across your maintenance team. Explore the full range of options in the Lifesafety Power catalog.
