Baumuller b maXX BM3400 Series - 6.8.3 Screening

Measures for EMC assurane 6.8T
ing) can affect the screening effect of the cabinet. Therefore also connect the cab le screens at the exiting
point with a well conductive screening. The distance of the last screen contact point to the cabinet exit
must be as short as possible.
Figure 6.7: Screen layer when exiting the sw itching cabinet
6.8.3 Sreening
• The screening of cables is effective with magnetic fields, if it is connected to ground on both ends.
• With electrical fields a screening effect is already existent if the screen is connected to ground on one
side.
Figure 6.8: Cable laying with two-sided screening plate
• Fields with high frequencies are always electromagnetic fields. Thereby it doesn’t matter if it is an elec-
tric or magnetic field. At these fields the screening always has to be done on both sides. With two-sided
applying of the screen on ground you achieve that the cable doesn’t leave the screening „System cabi-
net“.
• The two-sided grounding of cable screenings nearly excludes an influence due to ground loops (poten-
tial differences on the ground system).
Instrution Manual b maXX ® BM3400 65
Doument No.: 5.07013.03 from 206