To Next Page

To Previous Page

EMC Installation Guideline – Planning Guide (EMV) – 03.2004 Edition

2-13

2 EMC Basic Rules

Mass of metal parts

· Connect all metal parts of the control cabinet flat and well-conducting with each

other.

· Connect the cabinet doors via short ground straps (upper, middle, lower) with

the cabinet beam.

· Connect the shield bus and potential compensation bus extensively with the

cabinet housing.

· Create permanent connections of the metal parts. Perform screw connections

on painted and anodized metal parts either by means of special contact discs

or permanently remove the insulating protective layer between the parts.

· Do not use any aluminium parts if possible (danger of oxidation).

Filter

· Filter must usually be mounted directly at the place where the line to be filtered

enters the cabinet.

· Specific filters such as e.g. the SIMODRIVE filter module or the STEPDRIVE

filter must be placed, mounted and connected according to the manufacturers’

documentation.

· Filters must be fastened in such a way that they lie flat and have a good,

durable, conductive connection to the cabinet housing (assembly plate).

· The lines running to the filters must be separated from the lines exiting the

filters. Filtered lines must be run separately from unfiltered lines.

Cable running

· Route the signal-/data lines spatially separated from the power current-/power

supply lines (avoid coupling routes). Minimum distance in the control cabinet:

20 cm. Use an earthed separating plate, if necessary.

· Twist unshielded lines of the same circuit (forward and return conductor) if

possible or minimize the distance between the forward and return conductor.

· Route the lines as close as possible to metallic housing parts (e.g. assembly

plate, supporting beams, metal rails).

· Route signal lines and the appropriate potential compensation line as close as

possible to each another.

· Never route signal lines on devices which produce strong magnetic fields. (e.g.

motors, transformers).

· If possible, insert the signal/data lines at only one level (e.g. only from below)

into the cabinet.

Siemens SIROTEC Planning Guide

Other manuals for Siemens SIROTEC