KNX interface for electrical energy meters. The meter interface transfers all measurement data from Hager energy meters with infrared interface to the KNX bus by converting them into KNX telegrams. Active and reactive energy consumed and supplied, current active, reactive and apparent power, voltages, currents, frequencies, power factors, alarm messages for voltage overshoots or undershoots and excessive energy consumption can be sent to or read out on the KNX bus. Note: The device can be programmed using the easy commissioning tool, domovea basic or the ETS (from version 5).