Encoders for dynamic motion control applications - The ACURO® AD37 encoder enables high-speed safety applications

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

Hengstler has designed its ACURO® AD37 absolute encoder exactly to match ctrlX Automation controllers, which are often used in high-end industrial applications. The target group includes motor manufacturers who produce drives for these controllers.

The ACURO® AD37 offers a very high accuracy of ±36 arcseconds as well as a high resolution of 20 bits in single-turn and 12 bits in multi-turn operation. This makes the encoder ideal for all dynamic applications with high safety and accuracy requirements. Data transmission in the ACURO® AD37 is effected at a very high signal quality, making it possible to use this encoder for applications requiring cable lengths of up to 100 m. In combination with the component's high degree of functional safety, this is unique on the market.

Another advantage of the ACURO®AD37 absolute encoder is its single cable configuration for cost- and space-saving applications. Thanks to the ACURO® link interface developed by Hengstler, the encoder can transmit not only safety-relevant data but also the winding temperature of the motor, which is crucial when it comes to drive performance. Unlike conventional encoders, however, the AD37 does not require an additional wire to transmit temperature data: the motor winding temperature is determined in the encoder and transmitted to the controller together with the position data.

The shaft of the ACURO® AD37 is not directly connected to the motor shaft, as is the case with conventional encoders, but through an integrated coupling hub. As this thermally isolates the encoder shaft, the motor can also be operated at very high speeds. This allows users to exploit the ever-evolving dynamic possibilities of electric drives even more effectively.