S5-95F Guidelines for the Planning and Installation of the Product
3.4.5 Checklist for the Electromagnetically Compatible Installation of
Control Systems
Table 3-3. Checklist for Electromagnetically Compatible Installation
EMC Measures Notes
Connection of inactive metal parts (see section 3.3.1)
Check, in particular, the connections on:
• Subracks
• Cabinet members
• Shield and protective conductor bars
Do all inactive metal parts have a large-area, low-impedance
interconnection and ground?
Is there a satisfactory connection to the ground/protective conductor
system?
Have insulating layers on painted and anodized surfaces been
removed, or have special contact washers been used for the
connections?
Are connections protected from corrosion, e.g. by grease?
Are cabinet doors connected to the cabinet element with grounding
strips?
Routing of cables (see section 3.4.1)
Cabling subdivided into line groups?
Supply cables (230 to 400 V) and signal lines laid in separate ducts
or bundles?
Equipotential bonding (see section 3.4.2)
With a separate arrangement, check that the equipotential bonding
conductor has been correctly laid
Shielding of cables (see section 3.4.3)
Have metal connectors been used throughout?
Are all analog and data lines shielded?
Are line shields connected to the shield or protective conductor bar
at the cabinet entry?
Are line shields secured with cable clamps over a large area and at
low impedance?
Are line shields connected at both ends where possible?
Inductances (see section 3.4.4)
Are contactor coils which are not switched via SIMATIC contacts
fitted with quenching elements?
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EWA 4NEB 812 6210-02
3-13
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