The power supply units provide DC 24 V to all system components.

The power supply units ensure that the Cerberus PACE voice alarm system continues to operate without interruption in case of an 'AC 230 V' line voltage failure by providing a DC 24 V from the emergency batteries.

The power supply units also charge, monitor, and protect all emergency batteries. The batteries are charged in accordance with the standard EN 54‑4 based on their nominal capacity.

The power supply units are equipped with converters, overvoltage protection switches, and battery deep discharge protection. The deep discharge protection ensures that the batteries never fully discharge, in order to prevent battery damage.

The power supply units are suitable for use in a supply system with a nominal voltage of 230 V / 50 Hz.

Fault messages are displayed visually on the front of the unit.