Lifesafety Power FPO250/250-3C83D8PE12M FPO250/250-3C83D8PE12M

We've deployed dozens of FPO250/250 systems across mid-market access control projects — retail campuses, office parks, and industrial facilities with 30–80 doors spread across multiple buildings. What sets this unit apart is the philosophical shift it enables: instead of running separate 12V and 24V feed cables from a remote power room (or worse, embedding multiple small supplies in scattered panels), you can consolidate power distribution into a single locked cabinet at the primary entrance or main corridor. That consolidation alone saves 40–60% on wire runs, conduit, and rough labor in a typical 40-door retrofit. The dual 250W supply design is deliberate — one supply per major zone. On a 30-door facility, you might assign 15 doors + readers to Supply A (24V modern hardware) and 15 doors + legacy 12V solenoids to Supply B. Each supply breathes independently, and if a short or overload trips one supply's circuit protection, the other zone stays live. We've seen that real-world resilience prevent entire-site lockouts that would have occurred with a single monolithic power supply.

Technical Highlights:

• Independent 12V/24V Configuration per Supply: Unlike generic 12V-only or 24V-only PSUs, each of the two supplies can be field-set to its native voltage. We've used this to support aging Schlage 12V lock solenoids in one wing and new Salto readers (24V) in another without converters or step-down regulators, reducing BOM cost and eliminating one layer of troubleshooting if a regulator fails in the field.
• 24 Programmable Relay Outputs with Hardware Failsafe/Failsecure Selection: Every relay output can be independently set for failsafe (unlock on power loss), failsecure (lock on power loss), or fire alarm disconnect behavior. This granularity is operationally critical — you don't want all doors failing the same way. Emergency exits must failsafe; secure server rooms failsecure. The FPO250/250 allows per-door policy at the power supply level, not just in the access control software.
• Integral Battery Charging Circuit & UPS Capability: The onboard charger removes the need for a separate trickle-charger or external UPS module. A 12Ah sealed lead-acid battery (typical cost ~$40–60) gives you 20–30 minutes of emergency unlock time. In our experience, that's enough time for occupants to egress and for facility ops to migrate critical door access to a backup system or manual keys.
• Pre-Drilled Mercury/Lenel Mounting: Factory-prepared mounting holes for Mercury or Lenel boards eliminate custom drilling and bracket fabrication. On a 40-door site, that saves a full integration day. If you're working with an unfamiliar brand or a site using a different control platform, you lose this advantage — confirm access control platform compatibility before ordering.
• Tamper Switch & Audit Trail Integration: The cabinet locking mechanism with tamper input creates an event log entry whenever someone opens the enclosure. This is invaluable for compliance audits and for detecting unauthorized modifications to power distribution — a common attack vector in facilities with loose physical security practices.

Deployment Considerations:

• Mercury or Lenel software integration is native; third-party platforms (Genetec, Milestone, Salto Cloud) require custom bridging via relay-to-IP gateway or middleware. Budget integration time accordingly if your VMS doesn't speak Mercury or Lenel natively.
• The 250W per-supply limit is real — each supply can sustain roughly 10–12 standard solenoid lock circuits (25W each) plus auxiliary loads. High-power hardware (electric strikes drawing 40W+, IR heaters for outdoor readers) will consume your budget rapidly. Spec each zone's load before assigning supplies.
• Battery UPS runtime is NOT designed for sustained operation — the battery is for managed failover and orderly shutdown, not for running doors on backup power for hours. If extended UPS runtime is required, this is not the right product; size a separate UPS module upstream of the mains input.
• The enclosure is painted steel with a locking door. In damp or corrosive environments (parking garages, salt-spray coastal areas), request stainless steel or epoxy-coated variants at order time. Standard painted enclosures can rust through in 18–24 months in harsh conditions.
• Pre-drill mounting for Mercury/Lenel assumes you're using one of those brands' control boards. If you're retrofitting a site with a third-party board (or a newer Lenel/Mercury firmware variant with different pinout), verify harness compatibility with your integrator before installation to avoid on-site rework.

This unit is purpose-built for access control integrators managing mid-market facilities with mixed 12V/24V hardware, a need for localized UPS, and a requirement for consolidated power management. The dual-supply redundancy and granular failsafe programming make it an especially strong fit for high-traffic or security-sensitive buildings where zone-level power failure isolation is non-negotiable. For facilities with fewer than 15 doors or purely homogeneous 24V infrastructure, a single-supply 500W unit may be more cost-effective; for sprawling campuses (100+ doors), you'll need multiple FPO250/250 cabinets anyway, so design accordingly. Explore our Lifesafety Power catalog for complementary UPS modules, battery chargers, and power distribution accessories.