What interference can affect RFID?
Table 4-76
Interference sources: Causes and remedies
Interference source
Cause
Remedy
Electrostatic charging (ESD)
Moving parts of the drive tech‐
nology, such as rollers or
wheels made of plastic/
rubber that charge metallic
parts due to friction.
For example, transfer drives
or roller conveyors passing
through in combination with
transport units made of metal
or vice versa (rollers made of
metal and transport units
made of plastic) that are de‐
signed so that they are insula‐
ted against the conveyor tech‐
nology frame.
Prevent insulation of the transport
units.
Installation of ESD brushes or ESD
springs for discharging the electrostatic
charge.
Switched-mode power supply Interference emitted from the
current infeed
Replace the power supply unit
Interference injected through
the cables connected in series
Cable is inadequately shielded Better cable shielding
The reader is not connected to
ground.
Ground the reader
HF interference over the an‐
tennas
Caused by another 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 sec‐
tion Installation guidelines/reducing
the effects of metal
Planning the RF300 system
4.6 Guidelines for electromagnetic compatibility (EMC)
SIMATIC RF300
System Manual, 02/2021, C79000-G8976-C345-09
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