The HAY-PSUEN54-2AL is a reliable 2A EN54-4 certified fire rated power supply unit, specifically designed to deliver continuous and regulated 27.6V DC output for fire detection and alarm systems. With its intelligent design and compliance to European safety standards, this PSU provides dependable performance for critical life safety applications.
Built to ensure uninterrupted operation, this will seamlessly switch to battery backup in the event of a mains power failure. Its large steel enclosure accommodates two 18Ah sealed lead-acid standby batteries, providing extended backup capacity to maintain system functionality during emergencies. The tamper-resistant, wall-mountable design makes it suitable for professional fire alarm installations where durability and reliability are essential.
This model includes advanced battery management features, such as intelligent two-stage charging, deep discharge protection, and automatic health monitoring for low voltage, reverse connection, short circuits, and temperature variations. These safeguards maximise battery life while ensuring dependable performance when backup power is required.
For ease of maintenance and monitoring, the HAY-PSUEN54-2AL features clear LED indicators for mains status, battery health, and fault conditions. Additionally, it provides volt-free relay outputs (GEN and EPS) to signal general and mains fail faults to connected fire alarm control panels, ensuring system-wide fault awareness.
Fully compliant with EN54-4:1997 +A1:2002 +A2:2006, this power supply unit guarantees compatibility with certified fire safety systems. Its robust design (420 × 400 × 80 mm) and weight of approximately 5 kg (excluding batteries) ensure reliable installation, while integrated overload and short-circuit protection enhance long-term dependability.
This product offers the perfect balance of performance, safety, and compliance, making it an excellent choice for powering fire alarm systems and auxiliary devices in commercial and industrial environments.
