A Power Supply Unit (PSU) provides stable electrical power to the duress alarm control panel, panic buttons, communication modules, and compatible alarm accessories.
A security alarm Power Supply Unit converts incoming AC power into regulated DC power required by alarm system components. Depending on the model, it may include battery charging, overload protection, short-circuit protection, and low-battery monitoring.
When connected to a suitable backup battery, the power supply can help maintain alarm system operation during a mains power failure. The PSU must be correctly sized for the connected equipment and compatible with the alarm panel's voltage and current requirements.
Key Specifications
Input Voltage: 220–240V AC, 50Hz, for suitable Bangladesh installations.
Output Voltage: Typically 12V DC or 13.8V DC, depending on system design.
Output Current: Common ratings include 1A, 2A, 3A, or higher.
Battery Backup: Compatible rechargeable battery, commonly 12V sealed lead-acid.
Protection: Overload, short-circuit, and overvoltage protection where provided.
Battery Charging: Integrated charger on supported models.
Monitoring: AC failure, low battery, and power fault reporting where supported.
Mounting: Alarm enclosure, control cabinet, or dedicated power supply enclosure.
Common Uses
Powering DSC alarm control panels and compatible peripherals.
Supplying fixed duress and panic buttons.
Powering alarm keypads, receivers, and communication modules.
Supporting alarm systems during mains power interruptions.
Providing auxiliary DC power for compatible alarm sounders and relay modules.