1126939

Overview

The SICK 1126939 is a safety-related rotary encoder designed for industrial automation applications requiring high integrity. It achieves Safety Integrity Level SIL 3 according to IEC 61508 and Performance Level PL e per EN ISO 13849-1. The device supports Category 3 and Category 4 architectures, ensuring reliable monitoring of position and speed in safety-critical machinery environments.

Feature Summary

• Certified for Safety Integrity Level SIL 3 and Performance Level PL e
• Supports both Category 3 and Category 4 machine safety architectures
• Provides precise safety-related position and speed monitoring

Applications

• Safety monitoring in automated manufacturing systems
• Position verification in robotic axes
• Speed limiting in industrial machinery

Procurement Notes

Verify the specific suffix codes against the official SICK datasheet to confirm interface type and mounting configuration. Ensure the selected variant matches the required safety parameters for your application. Cross-reference the part number with current manufacturer documentation to avoid obsolete stock or incorrect revisions.

Selection Notes

Select this component when SIL 3 certification is mandatory for the safety function. Evaluate the required mechanical interface and electrical output compatibility with the existing controller. Confirm that the environmental conditions align with the encoder's operational specifications.

Part Context

This model belongs to the SICK safety encoder portfolio, engineered for critical motion control tasks. It integrates advanced diagnostic capabilities to detect failures within the sensing element, supporting compliance with stringent international safety standards for industrial equipment.

Replacement Considerations

Consult official SICK substitution lists for direct equivalents. Verify that any alternative maintains identical SIL 3 and PL e ratings. Mechanical dimensions and electrical interfaces must match to ensure seamless integration without redesigning the mounting structure.