Baumuller b maXX BM3400 Series - Page 66

T 6 Installation
• The HF-connection of a screen with ground can also occur capacitively. This avoids low-frequent errors
due to gr ound loops. Screening cables which pass different EMC ranges, may not be opened at the
terminals, because the screening attenuation otherwise decreases highly. These must lead to the next
module without interruption.
• The screen connection must occur with larg e surface area and low impedance. Cable tails with a length
of only 3cm (1cm wire = 10nH) reduce the screening effect at errors in the MHz range up to 30dB!
NOTE
The braided screen must have a coverage of at least 85%. The following cables possess an
especially high interference potential :
• Motor cable
• Cable to external chopper resistors
• Cable between mains filter and mains choke
• Cable between mains choke and converter
Figure 6.9: Suggestions for the screening plate at the device
66 Instrution Manual b maXX ® BM3400
from 206 Doument No.: 5.07013.03 Baumueller Kamenz GmbH