Power supply for fire protection systems EN54C 27.6V/10A/2×28Ah EN54C-10A28

Fire alarm system power supply – reliable power in critical situations

This advanced buffer power supply, designated as EN54C-10A28, is designed for uncompromising power supply of fire and smoke extraction systems. It meets the stringent standards of EN54-4 and EN12101-10, guaranteeing reliable operation in critical situations. The device provides a stable voltage of 27.6V DC, essential for the proper functioning of sensors, sounders and other system components.

The power supply is designed to work with two 28Ah/12V batteries, providing long-term backup power in the event of a mains power failure. Its design takes into account easy surface mounting and provides access to power for devices requiring a stable voltage. The housing made of steel sheet (RAL3001 – red) protects the internal components from mechanical damage and environmental influences.

Key features and applications

The device is characterized by high efficiency (up to 88%) and protection against short circuit (SCP), overload (OLP), overvoltage (OVP) and low battery voltage (UVP). Additionally, it is equipped with a tamper function – housing opening detection, which increases the security of the installation. The power supply has independently protected AUX1 and AUX2 outputs as well as EPS (AC mains failure) and ALARM (collective failure) technical outputs. The EXTi input allows connection of external alarm signals.

The EN54C-10A28 power supply is ideal for:

• Fire alarm systems (SSP)
• Smoke and heat control systems
• Fire installations requiring continuous power supply
• Public buildings, industrial and commercial facilities

Technical parameters and additional information

The power supply operates at a mains voltage of 230 V AC and provides an output voltage of 27.6 V DC. The continuous output current is 8.8 A, and the momentary 10 A. Own current consumption is a maximum of 85 mA, and the battery charging current is 1.2 A. The dimensions of the housing are 420 x 407 x 178 mm (+/- 2 mm), with a distance from the ground of 8 mm. The degree of protection is IP30, and the device has certificates of compliance with EN54-4 and EN12101-10 standards. The warranty is 3 years.

The power supply works with EN54C-LB4 and EN54C-LB8 fuse modules and EN54CLS4 and EN54C-LS8 sequential modules, allowing for flexible adaptation to specific installation requirements. Thanks to the use of high-quality components and advanced diagnostic functions, this power supply is a guarantee of safety and reliability of the fire alarm system.