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The SEM70-HN025AK22 is a high-resolution absolute multiturn rotary encoder from the SICK SEM70 series, designed for direct motor integration with a 25 mm hollow shaft. It utilizes the HIPERFACE® digital interface, allowing both power and data transmission over a single cable, which simplifies installation and reduces system complexity. Its compact, bearing-free design ensures wear-free operation and high reliability, making it ideal for applications requiring precise position feedback in space-constrained environments.

Key Technical Specifications

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

• Resolution:

  • Singleturn: 32 sine-cosine periods per revolution

  • Multiturn: 12-bit (4,096 revolutions)

  • Total Steps: 4,194,304

• Measuring Step: 10 arcseconds (with 12-bit interpolation)

• System Accuracy: ±155 arcseconds

• Integral Non-Linearity: ±100 arcseconds

• Differential Non-Linearity: ±55 arcseconds

• Latency: 25 microseconds

• User Memory: 2,048 bytes

• Code Type: Binary

• Code Sequence: Rising (for clockwise shaft rotation, viewed from the A-side)

• Connector Type: 8-pin male connector

• Power Supply: 7 to 12 V DC (recommended: 11 V DC)

• Current Consumption: ≤150 mA

• Startup Time: ≤180 milliseconds

• Weight: ≤130 grams

• Moment of Inertia: 60 g·cm²

Mechanical & Environmental Characteristics

• Shaft Type: Through hollow shaft (25 mm diameter)

• Maximum Operating Speed: 8,500 rpm

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

• Permissible Shaft Movement:

  • Radial: ±0.15 mm

  • Axial: ±0.4 mm

  • Static: ±0.3 mm

  • Dynamic: ±0.1 mm

• Operating Temperature Range: –30 °C to +115 °C

• Storage Temperature Range: –40 °C to +125 °C

• Relative Humidity: Up to 85% (condensation not permitted)

• Shock Resistance: 100 g for 10 milliseconds (per EN 60068-2-27)

• Vibration Resistance: 50 g from 10 Hz to 2,000 Hz (per EN 60068-2-6)

• EMC Compliance: According to EN 61000-6-2 and EN 61000-6-4 (Class A)

• Protection Rating: IP40 (with mating connector inserted and cover closed)

Typical Applications

• Industries:

  • Packaging machinery

  • Robotics

  • Industrial automation

• Use Cases:

  • Precise rotary position measurement

  • Servo motor feedback with large shaft integration

  • Systems requiring compact, wear-free encoder solutions