Lifesafety Power FPO250/250-3C83D8E12M 250W 24VDC Power Supply with Relay Lock Control

Overview

The FPO250/250-3C83D8E12M is a 250W centralized power supply and relay distribution module designed for access control and door lock integration. It delivers 20A at 12VDC or 10A at 24VDC, supporting 24 independently controlled relay outputs fused at 3A per channel. Each relay can be configured for failsafe (de-energize to unlock) or failsecure (energize to lock) operation, making it suitable for multi-door access control systems, building automation, and warehouse perimeter security where centralized power and switching logic are required.

Specifications & Configuration

The unit provides 24 relay lock control outputs on Bus1 and Bus2 architecture, with each output independently selectable for FAI (Fail-to-Appropriate-State) sequencing. All relay circuits are protected by 3A fuses, preventing cascade failures if a downstream door strike or solenoid locks. Additionally, 24 24VDC auxiliary outputs (also fused at 3A per channel) support low-draw sensors, indicator lights, or monitoring circuits. This dual-output design eliminates the need for external relay modules in mid-scale deployments.

Physical & Environmental

Housed in an E12 enclosure (48H × 36W × 8D inches) with a Mercury back plate and 24-door configuration template, the supply fits standard electrical cabinets. The compact depth (8 inches) minimizes wiring footprint in tight equipment rooms. No battery backup or supervision capability is documented in available evidence.