Power Supply PULSAR EN54C-5A28 for Fire Alarm Systems 27.6V 5A with 2×28Ah Battery Outputs

PULSAR EN54C-5A28 is a dedicated power supply unit designed for fire alarm and emergency systems. It provides a regulated 27.6 V DC output with up to 5 A continuous current and a built-in charger and supervision circuitry for standby batteries. The steel enclosure accommodates two 28 Ah batteries to ensure backup power for control panels, detectors and peripheral devices during mains failure. The unit is intended for fixed installation in equipment rooms, switchboards or cabinets that house life-safety electronics.

Advantages

The power supply delivers stable 27.6 V DC output with built-in battery charging and supervision to maintain reliable operation of connected fire alarm components. The enclosure supports two 28 Ah batteries, offering extended standby capacity without requiring external battery housings. Compact design and integrated features reduce installation time and simplify wiring for control panels, detectors and ancillary devices. The device includes protection and monitoring functions to support predictable behaviour in normal and emergency conditions.

Suitable for

• Powering fire alarm control panels and addressable detectors
• Supplying peripheral devices such as sounders, call points and relay modules
• Providing backup power for emergency systems in small to medium installations
• Fixed installation in equipment rooms, electrical cabinets and control panels

Key specifications

• Output voltage: regulated 27.6 V DC
• Maximum output current: up to 5 A
• Battery support: two standby batteries, each up to 28 Ah capacity
• Enclosure: metal housing suitable for wall or cabinet mounting
• Functions: battery charging, battery supervision and protective circuitry

How to use

Install the unit in a ventilated, dry location inside an appropriate cabinet or on a secure wall surface, following applicable electrical and fire safety codes. Connect the mains supply to the input terminals and attach the two standby batteries to the dedicated battery outputs, observing correct polarity. Route output connections to the fire alarm control panel and peripheral devices using appropriately sized wiring. Configure any supervision or signalling outputs as required by the fire system design and test the supply and battery backup operation after installation.

Usage recommendations

Use batteries of the specified 28 Ah capacity or manufacturer-recommended equivalents and replace them at intervals defined by system maintenance procedures. Verify charger and supervision settings during commissioning and perform regular inspections and battery condition tests to ensure reliable emergency operation.