The SINUMERIK expansion panel is used to install up to 12 additional operator controls, e.g. pushbuttons, indicator lights, and key switches, as an expansion to a Machine Push Button Panel or a machine control panel, or to expand the free inputs/outputs of a machine control panel.

The expansion panel has rounded edges in conformance with the design of the SINUMERIK operator panels.

The expansion panel is mounted from the rear using special clamps supplied with the panel.