Reliability, Safety
E 811 GB
9
27/02/2013
2.6 Electromagnetic Compatibility
2.6.1 Definition
Electromagnetic compatibility is the ability of a device to function satisfacto-
rily in its electromagnetic environment without itself causing any electromag-
netic interference that would be intolerable to other devices in this environ-
ment.
Of all known phenomena of electromagnetic noise, only a certain range oc-
curs at the location of a given device. These kinds of noise are specified in
the applicable product standards.
The design and immunity to interference of programmable logic controllers
are internationally governed by standard
IEC 61131-2 which, in Europe, has been the basis for European Standard
EN 61131-2.
Refer to IEC 61131-4, User's Guideline, for general installation instructions
to be complied with to ensure that hardware interface factors and the ensu-
ing noise voltages are limited to tolerable levels.
2.6.2 Interference Emission
Interfering emission of electromagnetic fields, HF
compliant to EN 55011, limiting value class A, Group 1
If the controller is designed for use in residential areas, high-frequency emis-
sions must comply with limiting value class B as described in EN 55011.
Fitting the controller into earthed metal cabinets and installing filters in the
supply lines may produce a shielding compliant to the above standard.
2.6.3 General Notes on Installation
As component parts of machines, facilities and systems, electronic control
systems must comply with valid rules and regulations, depending on their
field of application.
General requirements concerning the electrical equipment of machines and
aiming at the safety of these machines are contained in Part 1 of European
Standard EN 60204 (corresponds to VDE 0113).
For safe installation of our control system please observe the information
contained in the next chapters (
2.6.4 ff).