Festo CECX-X-C1 Series, Manual

Page: 127 / 631

System manual CECX / EC directives and standards
12.1.2 Which EMC measures must be taken?
EMC measures are focused on the areas of:

Shielding

Potential equalization between plant components
It is important to carry out the practical measures described in the following
sections correctly. The most frequent causes of failures are poor contact of
the ground (GND) and shield connections. For this reason you must pay at-
tention to all of the following generally accepted points:
Contacting of ground and shield connections

Low impedance connection of the parts. This also means good conduc-
tance at high frequencies and is achieved through:
- large connection areas,
- grounding conductors that are as short as possible,
- use of wide grounding ribbons instead of wires if possible.

Surface contact of bare metal must be available.

Contact surfaces must be protected against corrosion.

Use toothed washers on all connection points as much as possible for
connecting parts with unclean or rough surfaces.
Information
The grounding of an electrical system is not an adequate EMC measure
and serves mainly to protect against electric shock when touching conduc-
tive parts.
CECX-II 12-3