The SM 1238 Energy Meter 480 V AC is designed for use at machine level in an S7-1200 system. It registers various electrical and other measured values. This makes it possible to acquire transparency about the energy requirements of individual components of the production system starting at the machine-level.

The measured values provided by the SM 1238 Energy Meter 480 V AC can be used to determine energy requirements, power consumption and efficiency as well as make demand forecasts. Measurement data about power consumption are vital for load management and maintenance. They can also be used for emission reporting and calculating the CO₂ footprint.