Draft Version 02.06.2010 - Siemens SIMATIC RF600 System Manual

RF600 system planning
4.8 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 4-16
74
Cause
current infeed
Cable is inadequately
shielded
The reader is not connected
to ground.
caused by another reader
Ways in which interference can be coupled in

Draft Version 02.06.2010

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/
section
reducing the effects of metal
System Manual, 06/2010, J31069-D0171-U001-A10-7618
SIMATIC RF600