Siemens Simatic RF300 System Manual page 114

Planning the RF300 system
4.5 Guidelines for electromagnetic compatibility (EMC)
What interference can affect RFID?
Interference source
Switched-mode power supply Interference emitted from the
Interference injected through
the cables connected in
series
HF interference over the
antennas
Coupling paths
A coupling path has to be present before the disturbance emitted by the interference source
can affect the system. There are four ways in which interference can be coupled in:
Figure 4-12
114
Cause
current infeed
Cable is inadequately shield-
ed
The reader is not connected
to ground.
caused by another reader
Ways in which interference can be coupled in
Remedy
Replace the power supply
Better cable shielding
Ground the reader
Position the antennas further
•
apart.
Erect suitable damping materials
•
between the antennas.
Reduce the power of the readers.
•
Please follow the instructions in the
Installation guidelines/reducing
section
the effects of metal
System Manual, 07/2017, C79000-G8976-C345-07
SIMATIC RF300