Omron JX-A4004, Руководство пользователя, Страница: 50 / 220

2-26
2-2 Wiring
2
De
sign
•Take measures to minimize interference that is frequently coupled in through installation cables.
•Separate interfering cables with 0.25 m 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.
•Minimize the distance between an interference source and an interference sink (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.
•Follow safety measures in the filter installation.
•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.
•To achieve a protective ground connection for the filter:
•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.)