SICK SLG-2 User Manual

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Figure 4: Available SLG-2 beam separations
To further improve the resolution, the cross-beam function is also available.
Resolution / minimum object size (MDO) in parallel-beam mode
With the parallel-beam function, each light beam is received by the receiver element
situated directly opposite. In order for an object to be detected continuously, it must
completely cover at least one beam. This minimum object size is also referred to as
Minimum Detectable Object (MDO). The calculation of the MDO is as follows:
1
2 3
Figure 5: Minimum object size
1
Beam diameter
2
Object is not completely reliably detected
3
Object is reliably detected (meets requirements of minimum detectable object size)
MDO = beam separation + 5 mm
Resolution / minimum object size (MDO) in cross-beam mode
The parallel-beam function is used for measuring by default. With the cross-beam func‐
tion, a sender LED projects beams to several receiver diodes and evaluates them. This
increases the measurement accuracy and enables the detection of smaller objects.
Several cross-beam options are available:
•
3-fold cross beam: Parallel beam + the adjacent beam on each side
•
5-fold cross beam: Parallel beam + two adjacent beams on each side
•
7-fold cross beam: Parallel beam + three adjacent beams on each side
•
9-fold cross beam: Parallel beam + four adjacent beams on each side
The minimum detectable object size or the resolution depends on the position of the
object within the detection area (see image).
3 PRODUCT DESCRIPTION
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O P E R A T I N G I N S T R U C T I O N S | SLG-2 8026014/2021-06-10 | SICK
Subject to change without notice

SICK SLG-2 Specifications

General

Brand	SICK
Model	SLG-2
Category	Switch
Language	English