The Gira KNX Power Supply with Integrated Choke (2120 00) is intended to provide the bus voltage required by KNX TP devices while incorporating a choke for KNX bus operation. It forms part of the KNX line infrastructure and must be selected according to the connected devices’ combined bus-current demand and the requirements of the planned topology. Do not infer its rated output current from the product name alone; confirm the exact specification for article 2120 00 in the current Gira documentation. During design, allow suitable capacity margin and check line segmentation, wiring, protection and installation conditions. Follow the manufacturer’s instructions for connection and commissioning, and distinguish the supply’s output rating from the current drawn by a device on the bus.