System manual CECX / EC directives and standards
12.1 Why EMC-compatible wiring?
The interference immunity of an electrical system is crucially dependent on
EMC-compatible wiring and shielding. Experience in service shows that in-
adequate wiring and shielding of plant components are the most frequent
causes of faults and plant failures.
Faults caused by EMC are much more difficult to deal with than "conven-
tional" malfunctions:
Due to the type of symptom that occurs, they are often not recognized
as such and often resemble a fault in a module that is actually working
correctly.
They typically occur intermittently and are difficult to reproduce.
Troubleshooting is correspondingly complex and expensive.
Thus, from the very beginning, make sure you pay attention to careful
wiring and shielding in accordance with the guidelines described be-
low.
12.1.1 Basic structure of EMC measures
The EMC concept for the entire CECX modular control system is designed
in such a way that each module can independently withstand the influences
that occur in an electro-magnetically affected industrial environment.
A closed shield casing is assumed. This shield cover is correspondingly
expanded by shielded interfaces or, if unshielded interfaces are used, the
open shield cover is “closed” again via a filter (see figure).
GND
Shield connected to
GND via connector
shielded
interface
unshielded
interface
"Closed"
shield casing
pr
int
filt
er
Corresponding connections on the modules are provided for shielded inter-
faces. It is therefore not necessary to connect this cable shield with the sys-
tem via additional shield clamps.
Unshielded interfaces are filtered at their connection points according to
their useful signal. Thus, it is not necessary to additionally filter these lines.
CECX-II 12-2
Summary of Contents for CECX-X-C1 Series
Page 1: ...Manual Controller Modular CECX CECX X C1 CECX X M1 761886 1112c en ...
Page 2: ...1112c en ...
Page 4: ......
Page 6: ...1112c en ...
Page 7: ...CECX modular control system CECX modular control system ...
Page 46: ...CECX modular control system CECX I 38 ...
Page 47: ...System manual CECX ...
Page 48: ...CECX II ...
Page 56: ...Content System Manual CECX VIII ...
Page 58: ...System manual CECX Product design CECX II 0 2 ...
Page 68: ...System manual CECX Safety notes CECX II 2 6 ...
Page 76: ...System manual CECX System overview CECX II 3 8 ...
Page 84: ...System manual CECX General assembly and installation instructions CECX II 4 8 ...
Page 118: ...System manual CECX Operating behavior CECX II 8 6 ...
Page 122: ...System manual CECX Disposal CECX II 10 2 ...
Page 124: ...System manual CECX Technical data CECX II 11 2 ...
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Page 500: ...System manual CECX Bus link module CECX B CO CECX II 34 64 ...
Page 501: ...The library Ethernet lib The library Ethernet lib ...
Page 505: ...The library EventData lib The library EventData lib ...
Page 511: ...The library IncEnc lib The library IncEnc lib ...
Page 517: ...The Festo_EasyIP lib library ...
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Page 535: ...The library PLCService lib The library PLCService lib ...
Page 542: ...The library PLCService lib CECX VII 6 ...
Page 543: ...The library SysLibComEx lib The library SysLibComEx lib ...
Page 547: ...The Festo_Motion lib library ...
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Page 585: ...The Festo_PartDetector lib library ...
Page 601: ...FED VipWin interface ...
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