Rf300 - Siemens SIMATIC RF300 System Manual

Secondary fields without shielding
The following graphic shows typical primary and secondary fields, if no shielding measures
are taken.
Figure 4-1
In this arrangement, the reader can also read tags via the secondary field. Shielding is
required in order to prevent unwanted reading via the secondary field, as shown and
described in the following.
Secondary fields with shielding
The following graphic shows typical primary and secondary fields, with metal shielding this
time.
The metal shielding prevents the reader from detecting tags via the secondary field.
SIMATIC RF300
System Manual, 11/2009 - Zwischenstand 17.09.2009, A5E01642529-04
Secondary field without shielding
RF300 system planning
4.1 Fundamentals of application planning
33