Siemens S5-135U/155U System Manual page 31

Coupling Mechanism
Radiated Interference
Interference
Radiation Path
SIMATIC S5
System Manual
C79000-G8576-C199-06
Cause
There is a radiation path when a
conductor is subjected to an d i bj d
electromagnetic wave.
Impinging of the wave results in
induced currents and voltages.
Installation Guidelines
Typical Interference Sources
Local transmitters
(e.g. two-way radios) ( di )
Spark gaps (spark plugs,
collectors in electric motors,
welders)
3-5