The power supply unit is intended for supplying power to alarm system devices requiring 12 V DC supply voltage and current load of I=3 A. The design enables simple change of the output voltage, within the range of 12 - 15 V DC, by means of a potentiometer. The power supply unit is protected against short-circuit, overload and overvoltage. Power supply: ~ 200 – 240 V; 0,5 A; 50/60 Hz. Power supply output: 3A/12VDC. Voltage adjustment range: 12V-15V DC. Efficiency: 87%. Protections: SCP, OLP, OVP. Dimensions: L=110, W=78, H=36 [+/- 2mm].