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Rockwell Automation Publication 450L-UM001F-EN-P - March 2022
Chapter 6 Installation and Wiring
Figure 36 - Safety Distance from the Point of Danger to the Light Curtain
Minimum Distance from Reflective Surfaces
The infrared light that is transmitted from the two transceivers can be
reflected off shiny surfaces. If this condition occurs, it can result in an object
not being detected when it enters the GuardShield safety light curtain sensing
field.
All reflecting surfaces and objects (for example, material bins) must, therefore,
be at a minimum distance (A) from the protective sensing field of the system.
The minimum distance (A) depends on the distance (D) between the two
transceivers.
Figure 37 - Minimum Distance A from Reflective Surfaces (Top View)
Figure 38 - Minimum Distance A from Reflective Surfaces (Side View)
The minimum distance from the reflective surfaces can be determined as
follows:
•
Determine the distance D [m] between transmitter and receiver
•
Read the minimum distance A [mm] from the graph:
A
D
A
D
