Control units GN 9150 are designed for electronic position indicators GN 9153 with data transmission via radio frequency. They communicate via radio frequency with the position indicators as a wireless system for quick positioning.

Position indicators GN 9153 are required for the system to function. Control units GN 9150 form the interface between the position indicators and the machine control. A target position value is sent by the machine control to the control unit, which transmits this via radio frequency to the position indicator. The position indicator signals its current position value back to the control unit.

In combination with the machine control, this makes it possible to ensure that the production cycle does not start when the position set on the position indicator is incorrect, which can prevent errors in the production process.