The HAY-PSUEN54-2A is a high-quality EN54-4 certified 2A fire rated power supply unit designed for use in fire detection and alarm systems. Delivering a stable 27.6V DC output, this compact PSU provides reliable power for fire alarm control panels, sounders, detectors, and auxiliary devices, ensuring consistent operation in both mains and backup modes.
Engineered for reliability, the HAY-PSUEN54-2A features an uninterruptible power supply (UPS) function, automatically switching to battery backup during mains power loss. The unit supports two 7Ah sealed lead-acid batteries housed within a strong, wall-mountable steel enclosure, offering dependable backup power during critical events. Its space-efficient design makes it particularly suitable for smaller installations where reliability and compliance are required.
The unit incorporates advanced battery management and protection features, including intelligent charging, deep discharge prevention, and automatic monitoring for low voltage, incorrect connection, short circuits, and battery faults. These functions extend battery life and ensure reliable standby power when it is needed most.
Clear LED status indicators provide instant visual feedback for mains power, battery condition, and system faults, simplifying maintenance and diagnostics. The power supply also includes volt-free relay outputs (GEN and EPS) for fault and mains fail monitoring, ensuring seamless integration with fire alarm control panels.
Fully compliant with EN54-4:1997 +A1:2002 +A2:2006, the HAY-PSUEN54-2A meets strict European safety standards and is approved for use in certified fire detection systems. Compact enclosure dimensions of approximately 275 × 330 × 80 mm and a lightweight build make it straightforward to install, while overload and short-circuit protection guarantee long-term dependability.
The HAY-PSUEN54-2A offers installers and system designers a compact, compliant, and robust power supply solution. With dependable performance, intelligent battery protection, and full EN54-4 certification, it is the ideal choice for powering smaller fire alarm systems and associated safety equipment.
