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The STS084-HN084-AK22 is a non-contact, bearingless absolute rotary encoder from the SICK STS series, designed for direct integration into motors with an 84 mm through hollow shaft. It uses the HIPERFACE® digital interface, which combines power and data transmission over a single cable, simplifying installation and reducing wiring effort. Its compact, wear-free design ensures long service life and high reliability, even in demanding environments where precision and space efficiency are required.

Key Technical Specifications

• Interface: HIPERFACE® (digital, single-cable)

• Resolution:

  • 158 sine/cosine periods per revolution

  • 5,056 interpolated steps via RS485

  • Measurement step: 2 arcseconds (with 12-bit interpolation)

• System Accuracy: ±0.054°

• Repeatability: 0.01° (typical at ≤50 μm mechanical runout, 20 °C ambient)

• User Memory: 1,792 bytes

• Coding Type: Binary

• Code Direction: Increasing with clockwise shaft rotation (viewed from the A-side)

• Connector: 8-pin male connector

• Power Supply: 7–12 V DC (recommended: 8 V)

• Current Consumption: ≤250 mA

• Weight:

  • Sensor Head: ≤0.15 kg

  • Magnetic Ring: ≤0.75 kg

• Moment of Inertia: 1,525 g·cm²

Mechanical & Environmental Characteristics

• Shaft Type: 84 mm through hollow shaft

• Maximum Operating Speed: 4,700 rpm

• Maximum Angular Acceleration: ≤50,000 rad/s²

• Permissible Shaft Movement:

  • Radial: ≤0.6 mm

  • Axial: ±0.5 mm

• Operating Temperature:

  • Sensor head: –30 °C to +105 °C

  • Magnetic ring: –30 °C to +100 °C

• Storage Temperature: –30 °C to +100 °C

• Relative Humidity: Up to 95% (non-condensing)

• Shock Resistance: 100 g for 6 ms (EN 60068-2-27)

• Vibration Resistance: 20 g (10–2,000 Hz, EN 60068-2-6)

• EMC Compliance: EN 61000-6-2 and EN 61000-6-4

• Protection Class: IP00

Typical Applications

• Industries:

  • Packaging

  • Robotics

  • Industrial automation

• Use Cases:

  • High-precision rotary position measurement

  • Feedback systems for large-shaft servo motors

  • Compact installations requiring non-contact, maintenance-free encoder solutions