AC meter for measuring single-phase networks via a CTVT transformer connection (configurable transformer ratio for current and voltage) up to a maximum of 6 A. The following values are output on a white backlit display with up to 7 digits: active energy (class 1) and reactive energy (class 2) for import and export, power, current, voltage (LN), frequency, cos phi, power factor and apparent power. Communication can take place via the integrated RS485 interface or the infrared interface. The energy meter has 2 permanently configured inputs and outputs. The output can be used either as a pulse output or as an alarm output. Up to 25 alarm values can be set here. The inputs are used to control the tariffs or to count external pulses. The resettable intermediate counter enables individual intervals to be measured. The meter also records up to 4 tariffs. The meter is calibrated according to MID and approved according to IEC. The installation width is 4 DIN modules.