The AC/DC power supply unit is a 240 W universal power supply that has been specified and tested to suit operation in harsh environments, even as cold as −40 °C (−40 °F). The power supply unit operates from the universal AC (mains) input between 100–240 V AC and 50–60 Hz. The output voltage is adjustable, and set to 24 V DC in the factory.
Both the AC (mains) input and the DC output are equipped with overvoltage protection.