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Siemens SIMATIC Ident System Manual Page 63

Identification rfid systems.
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Table 4- 30
Flush-mounting of transponders and readers
Representation
SIMATIC RF300
System Manual, 07/2016, C79000-G8976-C345-0x
Planning the RF300 system
4.3 Installation guidelines
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.
63

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