Installation
EMC−compliant installation
Control cables
5
Ò
47
EDSMDAG EN 2.0
5.4.5 Control cables
ƒ Shield control cables to minimise interference injections.
ƒ Connect the shield correctly:
– Connect the shield of digital input and output cables at both ends.
– Connect the shield of analog input and output cables at one end of the inverter.
ƒ To achieve an optimum shielding effect (in case of very long cables, with high
interference) one shield end of analog input and output cables can be connected to
PE potential via a capacitor (e.g. 10 nF/250 V).
5.4.6 Detecting and eliminating EMC interferences
Interference Cause Remedy
Interference of analog
setpoints of the own or
other devices and
measuring systems
Unshielded HV mains cable
Unshielded motor cable
Use shielded cables
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 parts 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
CAN time out
or
CAN Bus Heavy
CAN communication is disturbed l Use cable according to CAN
specification
l Wire terminals completely
l Connect the shield with a good
electric conductivity
l Check terminating resistor
To Next Page
Loading...
