Lenze 8400 Manuel d'utilisateur télécharger pdf (Page 170)

Electrical installation

Installation according to EMC (installation of a CE-typical drive system)

Control cables

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170

EDS84ASC552 EN 9.1

6.2.4 Control cables

ƒ Control cables must be shielded to minimise i nterference injections.

ƒ For l engths of approx. 5 m and more, use only shielded cables for analog and digital

inputs and outputs. Under 5 m, 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 c ables can be connected to

PE potential via a capacitor (e.g. 10 nF/250 V) (see sketch).

9300vec043

Fig. 6-4 Shielding of long, analog control cables

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Lenze 8400 Manuel d'utilisateur Page 170