Power supply for fire protection systems EN54C 27.6V/5A/2×28Ah EN54C-5A28

Buffered power supply for fire protection systems

This buffered power supply, dedicated to fire protection systems, provides uninterrupted power to devices requiring stabilized 27.6 V DC voltage. It is suitable for fire alarm systems, smoke and heat control systems, and fire automation. The device complies with EN54-4 and EN12101-10 standards, guaranteeing its reliability and safety in critical situations.

Design and operating parameters

The power supply has two independently protected AUX1 and AUX2 outputs providing 27.6 V DC voltage. Depending on the operating mode, the output current can be 3.8 A (continuous operation) or 5 A (temporary operation). A built-in microprocessor controls the operation of the device and the battery, ensuring optimal charging and diagnostics. In the event of a mains power failure, the power supply automatically switches to battery power. The ability to cooperate with lead-acid batteries with a capacity of 28 Ah (two batteries) allows for long-term backup operation. The housing made of steel sheet (RAL 3001 – red) ensures durability and resistance to damage.

Safety and functionality

The power supply is equipped with a number of protections: short-circuit (SCP), overload (OLP), overvoltage (OVP), surge, and tamper (opening the housing). It also has EPS (AC power failure indication) and ALARM (collective failure indication) technical outputs, as well as an EXTi input for connecting external alarm signals. LED optical signaling informs about the operating status of the device – the presence of mains power, DC voltage at the outputs, and any failures. Additionally, the ability to cooperate with EN54C-LB4/EN54C-LB8 fuse modules and EN54C-LS4/EN54C-LS8 sequential modules expands the functionality of the system.

The power supply operates at an input voltage of 230 V AC and provides an output voltage of 27.6 V DC. The output current in continuous mode is 3.8 A, and in temporary mode 5 A. The battery charging current is 1.2 A, and the device efficiency reaches up to 89%. The dimensions of the power supply are 420 x 407 x 178 mm (+8mm distance from the ground), and the degree of protection is IP30.

The EN54C-5A28 power supply is a reliable solution for professionals installing fire protection systems and for users looking for a proven emergency power source for their security systems.