{"product_id":"haydon-en54-4-fire-alarm-psu-27-6v-5a-hay-psuen54-5a","title":"Haydon EN54-4 Fire Alarm PSU, 27.6V 5A HAY-PSUEN54-5A","description":"\u003cp\u003e\u003cstrong\u003eHaydon HAY-PSUEN54-5A\u003c\/strong\u003e is an EN54-4 certified uninterruptible power supply (PSU) for fire-detection and life-safety systems. The boxed unit delivers a nominal 27.6 V DC output with a continuous 5 A rating and includes a built-in battery charger and battery standby\/back-up within a tamper-protected steel enclosure. The PSU provides automatic mains-to-battery switchover, battery deep-discharge protection and status reporting via LEDs and a fault relay.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eEN54-4 certified for use with fire-detection \/ alarm systems.\u003c\/li\u003e\n  \u003cli\u003eNominal output: 27.6 V DC, continuous 5 A output.\u003c\/li\u003e\n  \u003cli\u003eBuilt-in battery charger and automatic mains-to-battery switchover; supports typical small enclosure battery fitment (2 × 7 Ah SLA).\u003c\/li\u003e\n  \u003cli\u003eTamper-protected steel enclosure with mains, battery and fault LEDs; tamper switch and mains-fail \/ fault relay for remote signalling.\u003c\/li\u003e\n  \u003cli\u003eElectronic overload, short-circuit protection and battery deep-discharge protection; mains transient protection.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eUse cases\u003c\/strong\u003e: Intended for fire alarm and life-safety installations in commercial and residential buildings. Suitable for system integrators, fire alarm installers and facilities managers. Not a plug-and-play consumer product — installation must be carried out by a qualified engineer in accordance with EN54 and local regulations.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCompliance \u0026amp; safety\u003c\/strong\u003e: EN54-4 certified (see manufacturer datasheet for full certification details and marking such as UKCA\/CE). Follow the supplied datasheet and local wiring regulations for battery sizing, cable routing and earthing. Do not modify the unit — servicing and battery replacement should be performed by qualified personnel.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eNotes\u003c\/strong\u003e: Some battery capacity and enclosure sizes vary by Haydon SKU. Confirm the exact enclosure variant and datasheet prior to ordering to ensure correct battery fitment and exact dimensions.\u003c\/p\u003e","brand":"Haydon","offers":[{"title":"-","offer_id":56594930499957,"sku":"HAY-PSUEN54-5A","price":191.66,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0050\/1216\/0612\/files\/ITM005946_1.png?v=1768252686","url":"https:\/\/wmestore.co.uk\/products\/haydon-en54-4-fire-alarm-psu-27-6v-5a-hay-psuen54-5a","provider":"WME","version":"1.0","type":"link"}