The KNX power supply unit is used to supply KNX devices with bus voltage and to provide 30 V DC for additional devices. It is mounted on a DIN rail in accordance with DIN EN 60715 in the sub-distribution board.
The device has an output with an integrated choke for supplying KNX bus lines and is short-circuit, overload, and open-circuit protected. It also has a reset button and a potential-free signal contact for operating and diagnostic messages.