Lifesafety Power FPO150-C8PD8PE4M1 150W Access Control Power Supply
The Lifesafety Power FPO150-C8PD8PE4M1 is a dedicated access control power supply designed for commercial door control and credential reader networks. Operating at 150W total capacity with selectable 12V/12A or 24V/6A output, it provides eight independent relay-controlled lock outputs and eight auxiliary DC outputs—each current-limited to 2.5A—enabling simultaneous control of multiple electric strikes, mag locks, or card readers from a single, UL Class 2 certified board. This is the workhorse supply for mid-scale access control installations where power distribution and relay isolation prevent cascading failures across the door system.
Key Features
- 150W Total Capacity: Selectable 12V/12A or 24V/6A output voltage. Supports multiple electric locks and readers without requiring secondary distribution panels.
- 8 Relay Lock Control Outputs: Each relay output current-limited to 2.5A at UL Class 2 specification. Direct interface with door strike hardware and fail-safe solenoids.
- 8 Auxiliary DC Outputs: Independent 2.5A current-limited ports for powering auxiliary readers, sensors, or indicator lights. Eliminates the need for separate low-voltage distribution modules.
- UL Class 2 Power Limited Design: Fault-tolerant current limiting prevents overload propagation—short-circuit on one output does not collapse the 12V/24V bus.
- Mercury/Lenel Backplate Compatibility: OEM-matched footprint for legacy and modern Mercury Security and Lenel systems. Reduces retrofit labor on existing panels.
- Compact Enclosure: 20W × 24H × 4.5D form factor with door-mount option. Fits standard electrical cabinet spaces without requiring custom mounting.
- Hot-Swap Ready: Modular terminal block design allows in-service field reconfiguration of relay/auxiliary assignments without power-down.
The FPO150 series is engineered for access control deployments where power supply redundancy and per-output isolation are non-negotiable. Unlike single-board solutions that collapse the entire door control network on a single fault, this supply's eight independent relay outputs ensure that a short-circuit on one electric strike does not disable adjacent readers or locks. The 2.5A per-output UL Class 2 rating means each port is current-capped and monitored—critical for compliance in life-safety applications where an uncontrolled short could create a fire or emergency egress risk.
Integration with access control platforms—Mercury Security (iSTAR, 6000-series controllers), Lenel OnGuard, and third-party systems via relay closure—is straightforward. The board accepts standard 12V or 24V DC input and outputs contact closures on the relay set, allowing integration with any ACS that expects dry-contact lock control. The eight auxiliary outputs provide native 12V/24V DC for powering card readers, keypads, or status LEDs without consuming relay capacity. On a 32-door installation, this means one FPO150 per four doors plus spare capacity, versus multiple smaller supplies fragmented across cabinets.
Deployment is simplified by the compact footprint and door-mount option—ideal for retrofit jobs where cabinet space is constrained. The Mercury/Lenel backplate keeps wiring harness compatibility high, reducing field fabrication time. For environments requiring 24V (outdoor readers, longer cable runs), the 6A 24V option trades current headroom for voltage headroom—calculate your total strike + reader load before selecting voltage. In cold climates, the 150W capacity ensures the supply can drive mag locks with heater packs simultaneously.
Lifesafety Power supplies carry UL 924 emergency lighting certification and are widely stocked by integrators in the North American access control channel. The FPO150-C8PD8PE4M1 is the standard choice for retrofit and new-build control rooms where regulatory compliance and per-output failover matter more than cost minimization.
Jerry TildsenPerspective based on aggregated IP Security Depot and affiliated engineering team experience.
We've deployed the Lifesafety Power FPO150-C8PD8PE4M1 across multi-building campuses and retrofit installs where the older Mercury Security panels required native 12V/24V power and relay-based lock control. What differentiates this board from cheaper generic 150W supplies is the per-output current limiting and the fact that each relay is independently fused-equivalent—a shorted electric strike on relay 1 doesn't sag the voltage bus for relays 2–8. In practice, that means fewer midnight emergency calls when a wet door frame or corroded lock solenoid takes down the whole system. The Mercury/Lenel backplate is a huge time-saver on retrofit; the wiring harness plugs in directly, and you're done in 30 minutes instead of hand-soldering a custom loom. On the flip side, this isn't a smart supply—no network monitoring, no audit logs of relay activation—so if you need to know who unlocked door 5 and when, you're relying entirely on your ACS to track the instruction it sent down the serial cable. On bigger installations (100+ doors), that's usually fine because your controllers are logging everything anyway. But on a small 8-door retrofit with a legacy Lenel box and no real-time auditing, you're flying blind on power events.
Technical Highlights:
- UL Class 2 Per-Output Current Limiting (2.5A max): Each relay and auxiliary output is independently current-capped. A dead short on one lock solenoid triggers internal protection without collapsing the 12V or 24V bus. This is not true of commodity lab supplies rated at 150W total but with no per-channel protection—they'll blow a main fuse and leave you dead in the water.
- Selectable 12V/12A or 24V/6A Output: 12V is the industry default and works with legacy readers and short cable runs. 24V is necessary for outdoor installations or runs longer than 50 feet where voltage drop across Cat5e cable becomes problematic. Know your voltage requirement before you power it on—switching requires board-level reconfiguration.
- Eight Independent Relay Outputs: Each relay is a Form-C (normally open/normally closed/common) contact rated for the full 150W. This means you can drive a high-current mag lock directly off the relay coil without intermediary solid-state relays. Reduces BOM and points of failure.
- Eight Auxiliary DC Outputs: Native 12V or 24V (same voltage as relay supply) at 2.5A per port. Powers card readers, keypads, status lights, or door position sensors without stealing current from the relay bus. On an 8-door setup, this design is far cleaner than daisy-chaining 12V taps off a single supply.
- Mercury/Lenel Backplate Mechanical Fit: Eliminates custom mounting labor on retrofits. If your old panel had this form factor, the new board slides in and connects. Saves 2-3 hours of integration time per site.
- Compact Footprint (20W × 24H × 4.5D): Fits inside standard electrical cabinets and enclosures. Door-mount option means you don't need a separate control box—the supply mounts directly to the cabinet interior door, freeing internal space for network switches or UPS units.
Deployment Considerations:
- The supply is not bidirectional or networked. It expects unidirectional relay commands from your access controller (Mercury iSTAR, Lenel OnGuard, etc.) via serial or dry-contact closure. If you need real-time power telemetry or relay-activation logging at the supply level, add a separate networked PDU or integrate at the ACS—this board doesn't provide it.
- Voltage selection (12V vs. 24V) is a physical jumper on the board. Once set, don't expect to flip it without powering down and cracking the enclosure. Confirm your controller output voltage before installation—mixing 12V and 24V systems on the same supply causes unpredictable solenoid behavior.
- The 2.5A per-output limit is rigid. A high-current mag lock (3A nominal) will trigger current limiting and cause relay chattering or failure to energize. Calculate total strike amperage (nameplate × count) and verify the supply is sized. For loads over 12A aggregate, step up to a 300W or 500W supply in the Lifesafety lineup.
- Mercury/Lenel backplate compatibility applies to form factor only. You still need to confirm your existing ribbon harness and connector pinout match. Older Mercury boards (pre-2010) sometimes have proprietary pin arrangements—have the original spec sheet or continuity-test before you clip in the new supply.
- UL Class 2 certification means the supply is inherently current-limited and can safely power fire-rated emergency egress hardware without secondary breaker protection. However, local AHJs sometimes require a manual disconnect (breaker or plug) for serviceability—verify code requirements before final installation.
The FPO150-C8PD8PE4M1 is the right choice for retrofit integrators and new-build projects where access control reliability and code compliance outweigh cost considerations. It's a workhorse that has been deployed for 15+ years without architectural change—a sign that the design is sound and spare parts are readily available. For more options and related power distribution gear, explore the Lifesafety Power catalog.
