Siemens SIMATIC MOBY D - Mounting of Multiple Antennas on or between Metal Frames

Planning the MOBY D system
4.3 Installation guidelines
MOBY D
System Manual, 01/2010, J31069-D0147-A6-7618
53
4.3.6 Mounting of multiple antennas on or between metal frames
Mounting of multiple antennas on or between metal frames
If closed conductor loops (metal frames, guides with cross struts) are located within the area
of the antenna's magnetic field, some of the energy will be coupled into these.
This effect results in:
● non-configurable field geometries
● undesirerd field propagation ("transformer effect")
The undesired field propagation would interfere with other antennas in the reception field or
reach other MDSs outside the configured fields.
To prevent these effects, care must be taken to avoid closed conductor loops in the
transmission range of the antennas or to interrupt them non-metallically.
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Figure 4-15 Conveyors/metal frames with non-metallic spacers