Lifesafety Power FPO250-4D8PE4M 250W Dual-Output Power Supply
Overview
The FPO250-4D8PE4M is a 250W power supply designed to feed access control, intercom, and alarm systems where you need both a high-capacity primary output and multiple discrete auxiliary feeds. It delivers 20A at 12V or 10A at 24V on the main rail — enough to run a moderate-sized panel plus door locks and magnets — while the eight auxiliary outputs each source up to 2.5A class 2 power, independently selectable for Bus1 or Bus2 topology. This matters in installations where one power supply must service multiple isolated circuits without cross-talk or shared fault domains.
Compatibility
The FPO250-4D8PE4M is engineered for Lifesafety Power integrated access control and power-management ecosystems. Verify compatibility with your control panel documentation before ordering; the Bus1/Bus2 selectability is hardware-specific to certain panel families. The auxiliary outputs accept standard 18–22 AWG twisted-pair wiring and are rated for class 2 power-limited loads — door strikes, magnetic locks, request-to-exit buttons, and low-draw solenoids are typical. Do not exceed 2.5A per auxiliary output; oversizing will trigger the built-in current limit.
Installation Notes
Mount in a standard enclosure or DIN-rail cabinet away from direct moisture exposure. Use 12 or 10 AWG conductors for the primary 20A/12V or 10A/24V output depending on your chosen voltage and run length — calculate voltage drop before installation. Each auxiliary output terminal accepts up to 18 AWG; tighten all screw terminals to firm hand torque (no impact tools). The unit draws approximately 1.2A from a 120V AC source at rated output; ensure your branch circuit breaker accommodates inrush. Do not daisy-chain units without isolating diodes; a fault in one supply can back-feed the other. Establish a separate return path to the panel ground for each voltage tier to avoid ground-loop noise on data circuits.
