Overview

The SRM50S-HGA0-K21 is a high-precision Safe Motor Feedback System (SRS/SRM50-S series), ideal for mission-critical servo and automation systems. It delivers absolute multiturn position data via a HIPERFACE® interface, featuring wide operational durability, enhanced safety compliance, and no-battery “safe-home” positioning.

Technical Highlights

Safety & Reliability

• SIL 2 / SILCL2 certified per IEC 61508 / IEC 62061.

• Meets Category 3 / Performance Level d (PL d) under EN ISO 13849 for functional safety.

• PFH (Probability of Dangerous Failure): 1×10⁻⁸ per hour; Mission Time (TM): 20 years SICKfra-connect.mo.cloudinary.net.

• MTTFd (Mean Time To Dangerous Failure): ~1,073 years fra-connect.mo.cloudinary.net.

Performance & Encoding

• Absolute multiturn resolution: 1 revolution × 32,768 steps, with 1,024 sine/cosine periods per rev.

• Measuring step: ultra-fine 0.3 arcseconds (with 12-bit interpolation);

• Accuracy: System accuracy of ±52″; typical Integral Non-Linearity ±45″, Differential N-Linearity ±7″ SICKmotionworld.com.

• Max absolute position speed: reliable up to 6,000 min⁻¹; rotor speed up to 12,000 min⁻¹ SICKmotionworld.com.

Interface & Connectivity

• Communication: HIPERFACE® absolute serial interface.

• Housing interface: 8-pin male radial connector.

• Supply: 7–12 V DC (recommendation: 8 V DC); current draw ~80 mA.

• Sine/cosine line frequency ≤200 kHz SICKmotionworld.com.

Mechanical & Environmental

• Shaft: Tapered with resolver-compatible stator coupling; rotor inertia of 10 g·cm².

• Torque: Operating 0.2 N·cm; Startup ~0.4 N·cm.

• Permissible shaft misalignment:

  • Static: ±0.3 mm radial, ±0.75 mm axial

  • Dynamic: ±0.1 mm radial, ±0.2 mm axial

• Angular offset allowance:

  • Static: ±0.005 mm/mm

  • Dynamic: ±0.0025 mm/mm motionworld.com.

• Speed and dynamics:

  • Maximum rotor speed up to 12,000 min⁻¹, angular acceleration up to 200,000 rad/s².

  • Bearing life: 3.6×10⁹ revolutions motionworld.com.

• Environmental resilience:

  • Operating temperature: –30 °C to +115 °C; Storage: –40 °C to +125 °C.

  • Shock: 100 g (10 ms); Vibration: 20 g, 10–2,000 Hz.

  • EMC robust to EN 61000-6-2 / -6-3, when properly grounded.

  • Protection rating: IP40 with connector plugged in motionworld.comSICK.

Advantages & Key Applications

• Certified Safe and Precise: Meets demanding safety requirements while offering sub-arcminute position accuracy.

• Absolute Multiturn Feedback: Safe and accurate motor positioning without reliance on batteries.

• Robust Design for Harsh Environments: Wide temperature range, high shock/vibration immunity, and long-lasting mechanics.

• Effortless Integration: HIPERFACE® interface and standard tapered shaft facilitate seamless system integration for servo-driven applications.

Ideal for servo motor feedback in robotics, CNC machinery, automated assembly, conveyor control, and any safety-critical automation involving fast, accurate, and reliable positioning.

Summary

The SICK SRM50S-HGA0-K21 guarantees high-fidelity absolute multiturn feedback coupled with certified functional safety (SIL2, PL d). With robust mechanical design, extended operational life, and precision encoding, it’s engineered for high-performance, safety-critical industrial motion systems.