Detection & Sensors Hengstler

ACURO AD37 – Encoders for dynamic motion control applications

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Hengstler ‘s ACURO ® AD37 absolute rotary encoder was specially developed for highly dynamic, safety-critical motion control applications with high data transmission rates and distances. With an overall depth of only 29 mm, the AD37 is the most compact motor feedback encoder in its class and is the only one in its category to meet the requirements of the safety integrity level (SIL3, PLe Cat.3).

Hengstler has tailored its ACURO ® AD37 absolute rotary encoder precisely to the Bosch-Rexroth controllers, which are often used in high-end industrial applications. In addition to users of Bosch controls, the target group also includes engine manufacturers who produce drives for these controls.

The ACURO ® AD37 offers a very high accuracy of ±36 angular seconds and a high resolution of 20 bits in single-turn and 12 bits in multi-turn operation. This makes the rotary encoder ideal for all dynamic applications with high safety and accuracy requirements. The ACURO ® AD37 transmits data with a very high signal quality, so that the rotary encoder can also be used for applications with cable lengths of up to 100 m. The combination with the high level of functional safety is unique on the market for rotary encoders in this class.

Another advantage of the absolute rotary encoder ACURO ®AD37 is its version in single-cable technology (single cable solution) for cost- and space-saving applications. Thanks to the ACURO ® link interface developed by Hengstler, the rotary encoder can transmit not only safety-relevant data but also the winding temperature of the motor, which is very important for the drive performance. In contrast to conventional rotary encoders, the AD37 does not require an extra line to transfer the temperature data: the motor winding temperature is determined in the rotary encoder and transmitted to the controller with the position data.

The shaft of the ACURO ®AD37 is not connected directly to the motor shaft as with conventional rotary encoders, but via a coupling hub. As this thermally insulates the encoder shaft, the motor can also be operated at very high speeds. In this way, users can optimally exploit the constantly evolving dynamic possibilities of electric drives.


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