A meter unit having at least one meter module and a bus interface module, wherein the meter unit is in the form of hardware and the bus interface module can be used to couple the meter unit to a bus system, as a result of which input data for the meter module can be received from a bus system and result data from the meter module can be output onto the bus system. In addition, a control system having such a meter unit is provided, also comprising a control device and a bus system, wherein the meter unit and the control device are connected to the bus system.