Lenze 931K - Manual (Page 12)

Electrical installation
Wiring according to EMC
4
l
12 KHB 13.0002−EN 4.1
4 Electrical installation
4.1 Wiring according to EMC
General notes l The electromagnetic compatibility of the drive depends on the type of installation and the care taken.
Especially observe:
– Assembly
– Shielding
– Earthing
l In the case of differing installations, the evaluation of the conformity to the EMC Directive requires the
system to be checked for compliance with the EMC limit values. This applies, for instance, to:
– Use of unshielded cables
l The user is responsible for compliance with the EMC Directive.
– If the following measures are observed, you can assume that no EMC problems will occur during operation
and that the EMC Directive / EMC law is met.
– If devices are operated close to the system which do not meet the CE requirements regarding the noise
immunity according to EN 61000−4−2, these devices may be electromagnetically impaired by the drive.
Assembly l Electrical contacting of the mounting plate:
– Mounting plates with conductive surface (galvanised or stainless steel) enable a permanent contact.
– Painted plates are not suitable for an EMC−compliant installation.
l If you use several mounting plates:
– Contact the mounting plates to each other over a large area (e.g. with copper strips).
l Route signal cables separately from mains cables.
l Route the cables as close as possible to the reference potential. Freely suspended cables act like aerials.
Shielding l If possible, only use braided cables.
l The overlap rate of the shield should be higher than 80%.
l Always use metal or metallised connectors for the serial data cable coupling. Connect the shield of the data
cable to the connector shell.
l Use metal cable clamps to attach the shield braid.
l Connect the shield to the shield bus in the control cabinet.
l Connect the shields of analog control cables at one end.
Earthing l Electrical contacting of the mounting plate:
– Mounting plates with conductive surface (galvanised or stainless steel) enable a permanent contact.
– Painted plates are not suitable for an EMC−compliant installation.
l If you use several mounting plates:
– Contact the mounting plates to each other over a large area (e.g. with copper strips).
l Route signal cables separately from mains cables.
l Route the cables as close as possible to the reference potential. Freely suspended cables act like aerials.