Control cables, Electrical installation − ems version – Lenze 8400 protec Manual User Manual
Page 114

Electrical installation − EMS version
Installation according to EMC (installation of a CE−typical drive system)
Control cables
l
114
EDS84DPS424 EN 5.0
7.4.3
Control cables
ƒ
Control cables must be shielded to minimise interference injections.
ƒ
For lengths of 200 mm and more, use only shielded cables for analog and digital
inputs and outputs. Under 200 mm, unshielded but twisted cables may be used.
ƒ
Connect the shield correctly:
– The shield connections of the control cables must be at a distance of at least 50
mm from the shield connections of the motor cables and DC cables.
– Connect the shield of digital input and output cables at both ends.
– Connect the shield of analog input and output cables at one end (at the drive
controller).
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) (see sketch).
9300vec043
Fig. 7−2
Shielding of long, analog control cables
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