1117664

Overview

The SICK LE20-2621 is a retro-reflective photoelectric sensor designed for industrial automation. It operates with a red light source and features a rectangular housing constructed from plastic. The device provides an NPN switching output with a selectable NO/NC configuration, ensuring compatibility with standard PLC inputs. It includes integrated signal evaluation electronics to process reflected light signals reliably. The unit supports PNP/NPN output types and utilizes a M8 connector interface for electrical connection. Its design emphasizes robust performance in automated environments requiring precise object detection.

Feature Summary

• Utilizes retro-reflective sensing technology for reliable object detection
• Features integrated signal evaluation electronics for stable operation
• Provides flexible NPN switching output with selectable normally open or normally closed logic

Applications

• Automated assembly line monitoring
• Packaging machine safety interlocks
• Conveyor belt presence detection

Procurement Notes

Verify the specific suffix code against the manufacturer's current datasheet to confirm output type and cable length. Ensure the supply voltage matches the sensor's rated input range before installation. Confirm that the NPN output polarity aligns with the receiving controller's input requirements. Check for any updated environmental ratings if operating in extreme temperatures.

Selection Notes

Select this model when a compact retro-reflective solution is required for general-purpose detection tasks. Consider the NPN output configuration if interfacing with legacy control systems. Evaluate the mounting space constraints due to the rectangular housing dimensions. Verify the required switching distance against the reflector specifications provided by the manufacturer.

Part Context

This component belongs to the LE20 series of photoelectric sensors manufactured by SICK. The series is characterized by its compact form factor and versatility in various industrial settings. It serves as a standard detection element within broader automation architectures, often paired with specific reflectors to ensure optimal signal reflection and detection reliability.

Replacement Considerations

Consult official cross-reference lists for direct replacements. Verify pinout compatibility and output logic levels before substituting.