KNX power supply with 2 outputs including 1 choke, 1280 mA. Power supply to generate the necessary KNX system voltage with a total current of 1280 mA which is automatically divided between two outputs. One 30 V DC output with choke on the bus terminal and an additional 30 V DC unthrottled output on a second 2-pin plug-in terminal. Consists of a modular device with 3-pin screw terminals for the power supply, three LEDs for displaying overvoltage, overload and operation. In addition, a detected fault can be acknowledged using a reset button. A potential-free signaling contact for operating and diagnostic messages is available via screw terminals. Suitable for operation in systems with a central emergency power supply.