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OPERATING INSTRUCTIONS
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16
O P E R A T I N G I N S T R U C T I O N S | WTT12-S
4
3
Figure 7: Object between sensor and reference function
Sensor
1
Light beam
2
Background object (floor) / reference surface
3
Object to be detected
4
Time course/switching behavior of a detection and a test, object between sensor and
reference:
1
2
HIGH
3
LOW
HIGH
4
10 Hz
LOW
Figure 8: Switching behavior using the example of the Object between sensor and reference
function
Object
1
Reference
2
Test input
3
Output
4
Test for reference, object is simulated (if L1 < Lmeas ≤ L3)
5
Test for object (if Lmeas < L1)
6
The downstream logic unit or controller must ensure a reliable object detection by evalu‐
ating the output behavior of the sensor during operating mode and test mode
Absence of the reference
Absence of the reference surface function (using the example of a mobile application):
α: 5° ... 90°
2
α
3
4
Figure 9: Absence of the reference surface function
Sensor
1
Light beam
2
Reference surface (e.g., floor)
3
Background (e.g., step/drop-off)
4
1
2
α: 5° ... 90°
α
10 Hz
10 Hz
5
1
10 Hz
6
8029123/2024/01/15 | SICK
Subject to change without notice
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