Interra 640 mA KNX Power Supplies generate and monitor bus voltage (SELV) for the KNX devices connected to the bus. They have 640 mA busloads with an integrated choke and wide-range mains input for worldwide usage. The bus line is decoupled from the power supply by an integrated choke. The voltage output is short-circuited and overload protected. The two-color LED indicates (Green and Red) device output status. It has a wide range of input from 85…265 V AC, to 50/60 Hz.