HAY-PSUEN54-5AL EN54-4 27.6V DC Fire Power Supply, 5 A (Boxed)

Introduction to the HAY-PSUEN54-5AL and its key features

The HAY-PSUEN54-5AL EN54-4 27.6V DC Fire Power Supply is a boxed, monitored power solution designed specifically for fire detection and alarm systems. Built to the EN54-4 standard, this unit supplies a nominal 27.6 V DC output with a usable 5 A current and includes automatic switchover to battery backup, an integrated charger, front-panel status LEDs and a volt-free fault relay for remote signalling. Packaged in a tamper-protected metal enclosure and available in two box sizes depending on battery requirements, the HAY-PSUEN54-5AL is intended for installers and system integrators who need a compact, standards-compliant PSU that makes commissioning and ongoing monitoring straightforward.

Detailed product specifications and the benefits they deliver

The HAY-PSUEN54-5AL is specified to meet the particular demands of fire alarm power supplies. Below is an organized breakdown of its main technical details and why each matters to an installer or system owner.

• Model: HAY-PSUEN54-5AL
• Certification: EN54-4 (fire alarm power supply)
• Enclosure: Tamper-protected metal box (standard or large variants)

• Input voltage: 110–240 V AC; Frequency: 47–63 Hz — wide AC input range simplifies siting and reduces the need for dedicated mains arrangements in many regions.
• Nominal output: 27.6 V DC — matches the nominal DC requirements of most conventional EN54-compatible fire panels and accessories.
• Usable output current: 5 A — suitable for small to medium systems or as a dedicated supply for subsystem loads (sounders, detectors, interface modules).
• Ripple: <180 mV — low ripple helps ensure stable operation of sensitive detection electronics and prevents nuisance faults.

• Battery support: Depends on enclosure: e.g., standard box supports up to 2 × 7 Ah and large box variants support up to 2 × 18 Ah — this flexibility lets you match battery standby time to system requirements and building category.
• Battery functions: Integrated charger with deep-discharge protection and continuous monitoring — automatic charging and battery protection extend battery life and ensure the standby source is reliable when needed.

• Fault signalling: Volt-free fault relay — enables remote fault reporting to a panel or building management system for fast troubleshooting.
• Indicators: Front-panel LEDs for mains, battery and fault — quick visual checks speed commissioning and routine maintenance.
• Protection: Output/battery fuses, overload and short-circuit protection — safeguards the system and connected devices against accidental damage or wiring faults.

Benefits in practice: EN54-4 certification means this PSU is designed and tested for use in life-safety systems, giving specifiers and installers confidence that the unit meets recognised performance and reliability benchmarks. Tamper-protected metal enclosure enhances security for public and commercial buildings. The combination of monitoring (LEDs + volt-free relay) and automatic battery management reduces the time a technician spends diagnosing or maintaining the PSU, lowering lifecycle costs and improving uptime.

Use cases and scenarios where the HAY-PSUEN54-5AL excels

The HAY-PSUEN54-5AL is suitable for a range of installations where EN54 compliance, battery-backed DC power and remote monitoring are required. Typical applications include:

• Small to medium commercial buildings: offices, retail units and small shopping parades where a 5 A DC supply can service the fire panel and audible/visual devices.
• Residential developments and apartment blocks: provides a compliant, enclosed PSU that can be wall-mounted in riser cupboards or plant rooms.
• Educational and healthcare facilities: where predictable standby times and monitored fault reporting are important.
• Retrofit and upgrade projects: boxed, tamper-protected units are easier to drop into existing installations than bespoke unboxed PSUs, especially when replacing older gear.
• Distributed sub-systems: powering sounder circuits, door release interfaces or ancillary control interfaces separate from the main fire panel.

Scenarios that highlight the unit’s strengths include a small office block that requires a compact EN54-4 PSU to feed a single panel and sounder loop, or a multi-occupancy building where the larger enclosure variant accommodates increased battery capacity for extended standby requirements. The remote volt-free relay is particularly useful for monitored sites with centralised fault logging.

How the HAY-PSUEN54-5AL compares with similar products on the market

When evaluating fire power supplies, buyers typically weigh certification, output current, enclosure type, monitoring capability and battery accommodation. Here’s how the HAY-PSUEN54-5AL stacks up against common alternatives:

• Versus generic bench power supplies: Generic or un-certified supplies lack EN54-4 conformity and often omit battery management and fault relays. The HAY unit is purpose-built for life-safety applications and includes the necessary monitoring and battery protections.
• Versus higher-current EN54-4 PSUs (e.g., 10 A+ models): Higher-current units are better for large systems with many devices, but they are larger, more expensive and may need more complex battery arrangements. The HAY-PSUEN54-5AL is cost-effective for small-to-medium installations where 5 A is sufficient.
• Versus open-frame or OEM PSUs: Open-frame PSUs may be cheaper or smaller but require an external enclosure and additional wiring/monitoring arrangements. The boxed HAY product reduces installation time and improves security with tamper protection built in.
• Versus similar boxed EN54-4 models from other manufacturers: Many boxed EN54-4 PSUs offer similar features — the deciding factors often become price, local support, battery size options and minor convenience features like LED layout, relay ratings and mounting options. The HAY-PSUEN54-5AL is competitive when considering its combination of EN54 certification, integrated charger with battery protection and an accessible fault relay.

Customer feedback and installer observations

There are no verified public customer testimonials embedded with this product listing. However, based on typical installer feedback for EN54-4 boxed PSUs with similar features, common positive points include:

• "Straightforward to install and wire — the boxed format and clear LED indications save time on site."
• "Included volt-free relay makes integration with the panel easier; fewer external modules needed for monitoring."
• "Battery management and deep-discharge protection have reduced battery replacement frequency compared to older units."

These representative comments reflect the kinds of benefits customers typically report when switching to a modern, standards-compliant PSU like the HAY-PSUEN54-5AL. For definitive, site-specific reviews, request references from suppliers or ask for case studies demonstrating performance in environments similar to your own.

Conclusion: why the HAY-PSUEN54-5AL is a strong choice

For projects that require a compact EN54-4 compliant power supply with reliable battery backup and effective monitoring, the HAY-PSUEN54-5AL is an attractive option. It balances the essentials — 27.6 V DC nominal output, 5 A usable current, integrated charger with deep-discharge protection, and volt-free fault relay — in a tamper-protected boxed solution that is straightforward to install and maintain. The availability of different enclosure sizes to suit battery needs adds useful flexibility for designers and installers.

With a suggested price of 249.00 (check local supply channels for exact currency and availability), the HAY-PSUEN54-5AL offers a cost-effective way to meet EN54-4 requirements without the complications of external battery wiring or additional monitoring modules. Always consult the official datasheet for detailed wiring diagrams, relay ratings and battery charging curves, and ensure installation is carried out by a qualified electrician in accordance with local regulations.

In short, the HAY-PSUEN54-5AL is well-suited to small and medium fire detection systems where compliance, reliability and straightforward monitoring are priorities — a pragmatic choice for installers and specifiers seeking a boxed EN54-4 PSU solution.