Basics for wiring according to EMC
Detecting and eliminating EMC interferences
5.3
5.3.7

5.3−6
EDSVF9383V EN 7.1−04/2012
5.3.7 Detecting and eliminating EMC interferences
Fault Cause Remedy
Interferences of
analog setpoints of
your own or other
devices and
measuring systems
Unshielded motor cable
Use shielded motor cable
Shield contact is not extensive
enough
Carry out optimal shielding as
specified
Shield of the motor cable is
interrupted by terminal strips,
switched, etc.
l Separate components from
other component part with a
minimum distance of 100 mm
l Use motor choke/motor filter
Install additional unshielded
cables inside the motor cable (e.g.
for motor temperature
monitoring)
Install and shield additional cables
separately
Too long and unshielded cable
ends of the motor cable
Shorten unshielded cable ends to
maximally 40 mm
Conducted
interference level is
exceeded on the
supply side
Terminal strips for the motor
cable are directly located next to
the mains terminals
Spatially separate the terminal
strips for the motor cable from
main terminals and other control
terminals with a minimum
distance of 100 mm
Mounting plate varnished Optimise PE connection:
l Remove varnish
l Use zinc−coated mounting
plate
HF short circuit Check cable routing
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