Hengstler Absolute Rotary Encoder ACURO AD58

Absolute Rotary Encoder ACURO AD58
Absolute Rotary Encoder ACURO AD58

Hengstler is a leading European manufacturer of industrial components for counting and control applications, such as counters / timers, rotary encoders, industrial and temperature controllers, relays, and printers and cutters. Hengstler offers a wide range of incremental and absolute encoders that provide reliable performance in challenging environments such as construction machinery, CNC machining, oil and gas, agriculture, mining and more.

HENGSTLER’s ACURO absolute rotary encoders offer innovative engineering, easy operation and optimized functional dependability. The platform-based concept enables particularly compact construction and modular internal components. As a result of this sophisticated modular system, HENGSTLER is in a position always to provide the right variant for applications involving motor feedback and automation. Equipped with an open BiSS sensor interface, these rotary encoders are ideal for all requirements and prepared for the future.

Absolute Rotary Encoder ACURO AD58

The AD58 multi-turn absolute encoder is an optical encoder with a multi-turn gear and optical scanning. The mechanical concept is based on a shaft assembly mounted in dual ball-bearings with a flexible torque support. As a result, these encoders are suitable for incorporating in BLDC servo motors and such demanding applications as CNC, precision positioning and high-resolution printing. The encoder is available with resolutions of up to 22 bits single-turn and 12 bits multi-turn.

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 AD 58, however, provides fully digital position data up to 22 Bit (Single-turn) and 12 Bit (Multiturn) over the BiSS interface with a variable clock rate up to 10 MHz. This corresponds a single-turn resolution of more than 4 million measured steps.


  • For brushless servomotors
  • Fully digital and high-speed
  • +120°C operating temperature
  • 10,000 rpm in continuous operation
  • Geared optical multiturn
  • SSI or BiSS interface
  • Optional sinewave 1 Vpp: harmonic distortion less than 1%
  • 500 kHz bandwidth

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Product Family AD58
Ordering Information Rotary Encoder AD58
Function / Application Absolute
Technology Optical
Approval UL
Housing Diameter [mm] 58 mm
Solid- / Hollow Shaft Hollow 10 … 12 mm
Solid 10 mm
Protection Rating Housing < IP40
Operating Temperature [°C] -15 … +120 °C
Housing Option Aluminium
Connection Cable
PCB connector
Revolutions [rpm] 10,000 rpm
Resolution ST [Bit] 12 … 22 Bit
Resolution MT [Bit] 12 Bit
Interface BiSS / SSI


Download Data Sheet: Absolute Rotary Encoder ACURO AD58

Ref: hengstler.de