● If signal lines cannot be routed a sufficient distance away from other cables, they must be
installed in grounded cable ducts (metal).
● The clearance (interference injection area) between the following lines must be kept to a
minimum:
– Signal line and electrical circuit signal line (twisted)
– Signal line and associated equipotential bonding conductor
– Equipotential bonding conductor and protective conductor (routed together)
EMC-compatible installation of the components
The PPU and operator components must be installed in metallically enclosed EMC-compatible
housings.
References
Additional specifications on interference suppression measures can be found in the following
references:
● EMC Installation Guideline Configuration Manual / Basic system requirements
● SINAMICS S120 Combi Manual
EMC limit values in South Korea
The EMC limit values to be complied with for South Korea correspond to the limit values of the
EMC product standard for variable-speed electric drives EN 61800-3, Category C2, or limit
value class A, Group 1 according to EN 55011. By applying suitable supplementary measures,
the limit values according to Category C2 or according to limit value class A, Group 1, are
maintained. Further, additional measures may be required, for instance, using an additional
radio interference suppression filter (EMC filter).
The measures for EMC-compliant design of the system are described in detail in this manual
respectively in the Installation Guideline EMC.
Please note that the final statement on compliance with the standard is given by the respective
label attached to the individual unit.
Application planning
4.2 EMC compatibility
PPU 1740
Equipment Manual, 01/2019, A5E47615272B AA 45
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