DAHUA AWZ-637 Impulse Buffer Power Supply for Access Controllers (12V DC, 5A, Battery Backup)

Power interruptions can cripple access control systems, leaving doors locked or, worse, unsecured. The DAHUA AWZ-637 impulse buffer power supply eliminates that risk by providing a stable 12V DC output with integrated battery backup. When mains power fails, it instantly switches to battery power, ensuring uninterrupted operation of controllers, readers, and locks. With a total output current of 5A and a 60W power rating, it comfortably supports multiple devices while simultaneously charging a backup battery. Built-in protection against short circuits, overloads, overvoltage, undervoltage, and overheating safeguards both the supply and connected equipment. A tamper-proof metal enclosure and LED status indicators make it a robust, user-friendly solution for professional installations.

Who is it for

This power supply is ideal for installers and facility managers responsible for access control, CCTV, or alarm systems in commercial buildings, offices, warehouses, and residential complexes. It suits any project where continuous operation is critical and power outages cannot be tolerated.

Main features

• Stable 12V DC output with 5A total current (4.5A for devices + 0.5A battery charging)
• Built-in battery charging for 7Ah to 24Ah / 12V lead-acid batteries
• Comprehensive protection: short circuit, overload, overvoltage, undervoltage, overheat, tamper
• Monitoring outputs for AC failure, battery low, and PSU failure (open collector)
• LED indicators for AC presence, DC output, and battery status
• Metal wall-mount enclosure with IP20 rating
• CE compliant, operates from -10°C to +40°C

Specifications

• Input voltage: 176-264V AC, 50/60Hz
• Output voltage: 12V DC
• Total output current: 5A
• Device output current: 4.5A
• Battery charging current: 0.5A
• Power output: 60W
• Recommended battery capacity: 7Ah to 24Ah / 12V
• Efficiency: 80%
• Battery connection: F2 terminals (Faston 6.3mm)
• Enclosure: metal, wall-mount
• IP rating: IP20
• Operating temperature: -10°C to +40°C
• Compliance: CE

Tips

For optimal performance, use a 12V sealed lead-acid battery with a capacity between 7Ah and 24Ah. Mount the unit in a well-ventilated area, away from direct sunlight and moisture. Periodically test the battery backup function to ensure readiness during an actual power outage.