Omron SYSDRIVE MX2 SERIES User Manual page 436

Appendix-4 Notes on Compliance with EC Directives and UL/cUL Standards
6. Take measures to minimize interference that is frequently coupled in through installation
7. Minimize the distance between an interference source and an interference sink
8. Follow safety measures in the filter installation.
To achieve a protective ground connection for the filter:
A
Appendix-11
cables.
Separate interfering cables with 0.25m minimum from cables susceptible to interference. A
particularly critical point is laying parallel cables over longer distances. If two cables intersect
(one crosses over the other), the interference is smallest if they intersect at an angle of 90° .
Cables susceptible to interference should therefore only intersect motor cables, intermediate
circuit cables, or the wiring of a rheostat at right angles and never be laid parallel to them over
longer distances.
(interference- threatened device), thereby decreasing the effect of the emitted interference
on the interference sink.
You should use only interference-free devices and maintain a minimum distance of 0.25 m from
the adjustable frequency inverter.
If using external EMC filter, ensure that the ground terminal (PE) of the filter is properly
connected to the ground terminal of the adjustable frequency inverter. An HF ground
connection via metal contact between the housings of the filter and the adjustable frequency
inverter, or solely via cable shield, is not permitted as a protective conductor connection. The
filter must be solidly and permanently connected with the ground potential so as to preclude
the danger of electric shock upon touching the filter if a fault occurs.
Ground the filter with a conductor of at least 10 mm2 cross-sectional area.
Connect a second grounding conductor, using a separate grounding terminal parallel to the
protective conductor. (The cross section of each single protective conductor terminal must be
sized for the required nominal load).
SYSDRIVE MX2 Series USER'S MANUAL (3G3MX2-Axxxx)