Lenze EVF9383 - Manual (Page 69)

Basics for wiring according to EMC
Control cables
5.3
5.3.4
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5.3−3 EDSVF9383V EN 7.1−04/2012
5.3.4 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. 5.3−1 Shielding of long, analog control cables