Hengstler Absolute Rotary Encoders ACURO AD36

Absolute Rotary Encoders ACURO AD36

The AD36 is an absolute encoder with a true geared Multiturn, optical sensing technology and 36 mm diameter. Unique is the through hollow shaft which enables an assembly that is compatible with resolver size 15. The mechanical design consists of two ball bearings and a flexible torque support. The AD36 complements the ACURO-DRIVE series and is appropriate for use within BLDC servo motors with small frame sizes.

Hengstler Absolute Rotary Encoders ACURO AD36 | Fully digital control loop

The new and completely digital OptoAsic technology enables the transition to a truly digital drive system. The conventional absolute encoders still have analog sine wave signals for the feedback of speed and position data. The AD36, however, provides fully digital position data up to 19 Bit (Singleturn) and 12 Bit (Multiturn) over the BiSS interface with a variable clock rate up to 10 MHz. BiSS is the only open high speed bidirectional sensor interface available on the market. Backward compatibility to most of the existing drives is realized through the variant with SSI interface together with 2048 sine -cosine periods per revolution.

Integrated diagnostic system

The AD36 has an integrated diagnostic system that controls and regulates the internal signals. Maximum motor uptime is achieved through the pre warning in case of any system error or aging effects well before they affect the function of the encoder. A code plausibility check guarantees that the output data represents always the true position. Also the operating temperature can be measured and read out with 8 Bit resolution. If programmable limits are exceeded or under run this is indicated over warn and alarm bits.


  • For brushless servomotors
  • Installation compatible with resolver size 15
  • With 8 mm through hollow shaft
  • 19 bits single-turn + 12 bits multi-turn
  • -40°C to +120°C operating temperature
  • 10,000 rpm in continuous operation
  • Geared optical multi-turn
  • SSI or BiSS interface
  • Sinewave 1 Vpp
  • 500 kHz bandwidth

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Product FamilyAD36
Ordering InformationRotary Encoder AD36
Function / ApplicationAbsolute
Housing Diameter [mm]38,1 mm
Solid- / Hollow ShaftHollow 8 mm
Protection Rating Housing< IP40
Operating Temperature [°C]-40 ... +120 °C
Housing OptionAluminium
 PCB connector
Revolutions [rpm]10,000 rpm
Resolution ST [Bit]12 ... 22 Bit
Resolution MT [Bit]12 Bit
InterfaceBiSS / SSI

Download Data Sheet: Absolute Rotary Encoders ACURO AD36

Ref: hengstler.de