The increasing use of electrical and electronic devices is accompanied by:
• Increasing density of components
• Increasing power electronics
• Increasing switching rates
• Lower power consumption of components
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:
• Intrinsic immunity to interference:
• Immunity to ambient interference:
• Degree of interference emission:
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
BAPT guidelines. 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
guidelines have to be followed when setting up a plant.
EMC measures usually consist of a complete package of measures, all of which need to be
implemented in order to ensure that the plant is immune to interference.
The plant manufacturer is responsible for the observance of the EMC guidelines; the plant
operator is responsible for radio interference suppression in the overall plant.
All measures taken when setting up the plant prevent expensive retrospective modifications
and interference suppression measures.
The salient national specifications and regulations must be observed. They are not covered
in this document.
System Manual, 05/2005, (4)J31069 D0166-U001-A1-7618, --
immunity to internal electrical disturbance
immunity to external electromagnetic disturbance
emission of interference and its effect on the electrical environment
RF 300 system planning
4.6 EMC Guidelines