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Planning the RF300 system
4.3 Installation guidelines
Table 4- 32
Flush-mounting of transponders and readers
Representation
Mounting of several readers on metal frames or racks
Any reader mounted on metal couples part of the field to the metal frame. There is normally
no interaction as long as the minimum distance D and metal-free areas a, b are maintained.
However, interaction may take place if an iron frame is positioned unfavorably. Longer data
transfer times or sporadic error messages at the communication module are the result.
68
Description
Problem:
Flush-mounting of transponders and
readers is possible in principle.
However, the size of the transmis-
sion window is significantly reduced.
The following measures can be
used to counteract the reduction of
the window:
Remedy:
Enlargement of the non-metallic
spacer below the transponder
and/or reader.
The transponder and/or reader are
10 to 20 mm higher than the metal
surround.
(The value x ≥ 100 mm is valid, e.g.
for RF310R. It indicates that, for a
distance x ≥ 100 mm, the reader
can no longer be significantly affect-
ed by metal.)
Remedy:
Increase the distances a, b to metal.
The following rule of thumb can be
used:
Increase a, b by a factor of 2 to 3
•
over the values specified for
metal-free areas
Increasing a, b has a greater
•
effect for readers or transpond-
ers with a large limit distance
than for readers or transponders
with a small limit distance.
System Manual, 07/2017, C79000-G8976-C345-07
SIMATIC RF300
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