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• How can interference be eliminated?
• Examples of interference-free plant design
The description is aimed at "qualified personnel":
• Configuration engineers and planners who plan system configurations with RFID modules
and have to observe the necessary guidelines.
• Installation and service engineers who install the connecting cables in accordance with this
description or who rectify defects in this area in the event of interference.
Note
Observe the EMC directives
Failure to observe the specifically emphasized notes can result in dangerous conditions in the
plant or the destruction of individual components or the entire plant.
4.6.2
What does EMC mean?
The increasing use of electrical and electronic devices is accompanied by:
• Higher component density
• More switched power electronics
• Increasing switching rates
• Lower power consumption of components due to steeper switching edges
The higher the degree of automation, the greater the risk of interaction between devices.
Electromagnetic compatibility (EMC) is the ability of an electrical or electronic device to operate
satisfactorily in an electromagnetic environment without affecting or interfering with the
environment over and above certain limits.
EMC can be broken down into three different areas:
• Internal immunity to interference:
Immunity to internal (own) electrical disturbance
• External immunity to interference:
Immunity to external electromagnetic disturbances
• Degree of interference emission:
Emission of interference and its effect on the electrical environment
All three areas are considered when testing an electrical device.
The RFID modules are tested for conformity with the limit values required by the CE and RED
directives. Since the RFID modules are merely components of an overall system, and sources of
interference can arise as a result of combining different components, certain directives have to
be followed when setting up a plant.
Planning the RF300 system
4.6 Guidelines for electromagnetic compatibility (EMC)
SIMATIC RF300
System Manual, 02/2021, C79000-G8976-C345-09
109