The bearingless inductive encoders type ECI/EQI 1100 with a diameter of 37 mm and ECI/EQI 1300 with a diameter of 65 mm from Heidenhain serve as position feedback for highly dynamic applications. All variants support the safety integrity level SIL 2, category 3 PL d. With additional measures in the controller, they even achieve SIL 3 or category 4 PL e. The encoders include mechanical fault exclusion to prevent the shaft and stator connection from loosening. In terms of system accuracy, the devices offer greatly reduced short-period measurement deviations, according to the manufacturer. Diagnostic functions such as monitoring the encoder temperature, the motor temperature and the tolerances of the motor during operation are supported. The encoders read out this data and the downstream electronics can read it out digitally via the purely serial EnDat 2.2 interface without interrupting the control cycle.