KNX power supply REG-K/640 mA with emergency power input. For generating the bus voltage for a line with up to 64 bus devices. The emergency power supply REG can be connected in order to buffer the bus voltage. With integrated choke to decouple the power supply from the bus and a push-button to disconnect the power and reset the bus devices connected to the line. For installation on DIN rails TH35 according to EN 60715. The bus is connected using a bus connecting terminal. a data rail is not necessary. Nominal voltage: AC 110-230 V ±10%. Operating voltage: min. AC 92 V - max. AC 253 V. Mains frequency: 50-60 Hz ±10%. Output voltage: DC 30 V. Output current: max. 640 mA, short-circuit-proof. Device width: 4 modules, approx. 72 mm. Contents: With bus connecting terminal and cable cover. Colour: light grey