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Effects Of Metal On Different Transponders And Readers - Siemens SIMATIC Ident System Manual

Identification rfid systems.
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Planning the RF300 system
4.3 Installation guidelines
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.
Table 4- 31
Mounting several readers on metal frames or racks

Effects of metal on different transponders and readers

Mounting different transponders and readers on metal or flush-mounting
Certain conditions have to be observed when mounting the transponders and readers on
metal or flush-mounting. For more information, please refer to the descriptions of the
individual transponders and readers in the relevant section.
Interaction between readers
Increase the distance D between the two readers.
Introduce one or more iron struts in order to short-
circuit the stray fields.
Insert a non-metallic spacer of 20 to 40 millimeter
thickness between the reader and the iron frame. This
will significantly reduce the induction of stray fields on
the rack:
System Manual, 07/2016, C79000-G8976-C345-0x


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