Cabinet Configuration; Rf300 - Siemens SIMATIC RF300 System Manual

RF300 system planning
4.7 EMC Directives
Table 4- 40
Coupling path
Conductors and cables
Control cabinet or housing
4.7.5

Cabinet configuration

The influence of the user in the configuration of an electromagnetically compatible plant
encompasses cabinet configuration, cable installation, ground connections and correct
shielding of cables.
Note
For information about electromagnetically compatible cabinet configuration, please consult
the installation guidelines for SIMATIC PLCs.
Shielding by enclosure
Magnetic and electrical fields and electromagnetic waves can be kept away from the
interference sink by using a metal enclosure. The easier the induced interference current can
flow, the greater the intrinsic weakening of the interference field. All enclosures and metal
panels in the cabinet should therefore be connected in a manner allowing good
conductance.
Figure 4-24
92
Causes of coupling paths
Shielding by enclosure
System Manual, 11/2009 - Zwischenstand 17.09.2009, A5E01642529-04
Invoked by
Incorrect or inappropriate installation

Missing or incorrectly connected shield

Inappropriate physical arrangement of cables

Missing or incorrectly wired equalizing conductor

Missing or incorrect earthing

Inappropriate physical arrangement

Components not mounted securely

Unfavorable cabinet configuration

SIMATIC RF300