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Planning and
Installation Guidelines
V 6
Technical Description
1
1.1 Geometry of the primary loops
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Wireless Proximity Switches / Issue: 03.2005
Primary loops
Primary loops are used to generate the electromagnetic field which supplies energy for all
wireless proximity switches of a machine or a manufacturing cell.
Below, the fundamental things are described which have to be observed for the installation
of the primary loops.
The top view to the primary loops represented on the left-hand side of figure 1.2 shows the edge
length s
and the edge length s
a
Maximum permitted sizes of the primary loops:
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Edge length s
between 1 m and 3 m
a
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Edge length s
between 1 m and 6 m
c
The following constraint has to be observed:
≥ s
-
s
c
a
Procedure:
Set up 4 two-dimensional primary loops (2 pairs) around the part of the machine containing
wireless proximity switches in a way that always the two opposite primary loops roughly have the
same size and geometry.
Set up the primary loops rectangular to each other.
-
Max. tolerance: ± 8°.
Set up the lop pairs symmetrically.
Permitted distance of the two primary loops of one pair to each other:
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2/3 of the shortest edge length of one primary loop (± 10%).
The individual primary loops must cross each other with 1/6 (tolerance max. ± 20%) of their
length (refer to fig. 1.3).
This way, a square outline is evenly supplied with energy.
Important:
Position the primary loops in a way that their electromagnetic field is not shielded by
large metal surfaces or short cicuit loops, in e. g. the support structure (refer to fig. 1.6).
.
c
Planning and Installation Guidelines
5
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