Figure 22. Shielding plate between scanners
To further aid in cross talk avoidance, the scanners feature four selectable scan codes. See
on p.
32
3.2.3 Light Interference
Reflective surfaces located near the safety device may cause passive reflections. These reflections can affect the detection
of an object inside the safety zone. The passive light sources can be an incandescent lamp, sunlight, a fluorescent light, a
strobe light or other infrared light sources.
Do not install the SX Series Safety Laser Scanner near strong and/or flashing light sources.
Ambient light may interfere with the functioning safety laser scanner. If the installation requires direct exposure to ambient
light, the scanner must be positioned so that the light does not enter the output window within ±5° of the detection plane.
Figure 23. Position the scanner to avoid light interference
±5°
CAUTION:
In all applications where strong light within ±5° of the detection plane cannot be avoided, apply
an additional distance (Z
amb
) to the Minimum Safety Distance calculations. This distance could be
influenced by the selected Dust Filter Level and the presence of reflective backgrounds of light sources
(e.g. halogen lamp with back reflector). For all models except SX5-B, an additional distance of 200 mm is
typically enough to prevent any reduction in the detection capability (for the SX5-B see
on p. 129 to determine the extra distance needed). See the minimum safety distance
calculation section (
Minimum Safety (Separation) Distance Formula
on p. 35), and the dust filtering
on p. 32).
CAUTION:
In any case where bright light is present outside the ±5° range, the additional distance is still
highly recommended.
Important:
In cases of both light interference and high reflective backgrounds, additional distances do not
have to be summed, but the longest distance should be used.
3.2.4 Highly Reflective Backgrounds
If there is a highly reflective background within 3 meters of the safety zone boundary, for example a metallic glossy surface,
the SX Series Safety Laser Scanner might fail to recognize the exact distance of the detected object.
In this situation, we recommend reducing or removing the reflecting background.
SX Safety Laser Scanner
30
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