Pulsar EN54C-3A7 Buffer Power Supply for Fire Alarm Systems, 27.6V DC, 3A, Metal Enclosure

The Pulsar EN54C-3A7 is a high-performance buffer power supply specifically designed for fire alarm systems (FAS). Compliant with EN 54-4:2007 + A2:2006, this unit ensures reliable power delivery and battery charging for critical safety applications. With a robust metal enclosure and IP20 rating, it is suitable for surface mounting in indoor environments.

Advantages

This power supply offers a total output current of 3A, with 2.5A dedicated to the system and 0.5A for battery charging. It supports two 12V/7Ah batteries in series for 24V operation, providing backup power during mains failure. Comprehensive protection features include short-circuit (SCP), overload (OLP), overvoltage (OVP), undervoltage (UVP), overtemperature (OHP), and tamper protection. Visual LED indicators for AC, DC, battery, and fault status simplify monitoring, while signaling outputs (OC type) for AC failure, battery fault, and PSU fault enable remote supervision.

Suitable for

• Fire alarm systems requiring EN 54-4 compliance
• 24V DC buffer power supply applications
• Indoor installations with surface mounting

Key specifications

• Input voltage: 176-264V AC, 50/60Hz
• Output voltage: 27.6V DC
• Total output current: 3A (2.5A system + 0.5A battery charge)
• Battery charging current: 0.5A
• Recommended battery: 2x 7Ah/12V (24V system)
• Number of outputs: 2 (system, battery)
• Protection: SCP, OLP, OVP, UVP, OHP, tamper
• Signaling outputs: AC failure, battery fault, PSU fault (OC type)
• Visual indicators: LEDs for AC, DC, battery, fault
• Enclosure: Metal, IP20
• Operating temperature: -10°C to +40°C
• Battery deep discharge protection: Yes
• Mounting: Surface mount
• Certifications: CE

Recommendations

For optimal performance, use with recommended batteries and ensure proper ventilation. The unit is designed for continuous operation and should be installed by qualified personnel in accordance with local regulations.