The power supply unit is intended for the feeding of alarm system equipments, which require 48V DC supply voltage and current load I=3A. The design enables simple changing of the output voltage, within the range of 48V÷53V DC, using a potentiometer. The power supply units is protected against short-circuit, overload, surge protection and overvoltage. Power supply: 176÷264VAC/50Hz. Power supply output: 3A/48VDC. Voltage adjustment range: 48V÷53V. Efficiency: 85%. Protections: SCP, OLP, OVP. Dimensions: L=199, W=110, H=50 [+/- 2mm]. For mounting on a DIN rail, required bracket PSDIN2.