Lifesafety Power FPO75-C8E1M 75W Power Supply Board

Overview

The FPO75-C8E1M is a 75W industrial power supply board designed to deliver regulated 12V or 24V output with eight independent relay-controlled lock circuits. Each output is independently fused at 3A, meaning you can drive eight separate door locks, magnetic latches, or low-current access-control loads without a single shorted lock nuking the entire system—the failed circuit isolates, the other seven keep running. This matters in multi-door deployments where a wiring fault or failed magnet lock shouldn't take down your whole facility's access security. The board mounts in a compact enclosure (12W × 14H × 4.5D) with pre-drilled Mercury/Lenel backplate compatibility, so it drops straight into existing access-control cabinets without custom fabrication.

Compatibility

The FPO75-C8E1M is compatible with Mercury access-control systems and Lenel-based installations. It accepts 12V or 24V DC input and outputs fused relay pairs suitable for standard electromagnetic locks, electric strikes, and door-holder solenoids rated for the output voltage and current limit (6A @ 12V, 3A @ 24V per circuit). Verify your lock manufacturer's voltage and inrush current specs before installation—oversized solenoids or multiple locks on one relay may exceed the 3A per-output limit.

Installation Notes

Mount the board vertically or horizontally within an access-control enclosure, ensuring adequate ventilation around the transformer and relay stack. All eight relay outputs are fused independently at 3A; do not bypass or upsize fuses without recalculating load current. Connect 12V or 24V DC input via the backplate terminals; polarity matters. Verify DC supply voltage stability (±10% nominal) before energizing relay circuits. The Mercury/Lenel backplate is pre-installed; no additional mounting hardware is required for standard cabinet installations.