Rotary encoder series ECI 4000/EBI 4000 offers encoder variants that are modular devices without integral bearing and with a 90-mm hollow shaft. This enables users to replace the conventional toothed-belt drive for coupling a motor feedback system to torque motors. The single-turn version features resolution of 20 bits. As an alternative, EBI 4000 is a multiturn variant that features a revolution counter option with resolution of 16 bits and that is backed up by an external battery buffer. These inductive rotary encoders consist of a scanning unit and the scale drum. They have an overall height of 20 mm.