Inductive Rotary Encoders with Higher Resolution Now Available

The inductive rotary encoders of the ExI 1300 series are now available in versions with even higher resolution. Depending on the respective applications and accuracy requirements, both inductive and optical absolute encoders are possible options. The rotary encoders of the ExI 1300 series with EnDat 2.1 interface have a singleturn resolution of 19 bits (524 288 position values per revolution), with which an even higher control quality of the drive is achieved.

Servo drives with inductive rotary encoders enjoy advantages over resolvers in terms of positioning accuracy, speed stability and control dynamics. This is made possible by the greater control bandwidth and a significantly higher number of signal periods for the formation of the singleturn position value. The position value is produced by electronics already integrated in the encoder, and is transferred as purely digital information to the higher-level electronics over the fast bidirectional EnDat interface. As an option, the information can be transferred as an analog signal. An integrated readable and writable EEPROM makes user parameters available in the subsequent electronics at all times, enabling the encoder and its environment to self-configure over the synchronous serial interface.

The encoder’s real multiturn capability frees the system from the need to be “homed” after power interruptions or switch-on. Conventional battery-supported systems requiring regular maintenance are no longer needed. Alarm and diagnostic functions ensure high system availability rates.

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