Siemens S5-135U/155U - Manual (Page 45)

3-19
System Manual
C79000-G8576-C199-06
3.3.5 Checklist for the Electromagnetically Compatible Installation of
Control Systems
EMC Measures Notes
Connection of inactive parts (Section 3.2)
Check, in particular, the connections on:
S
Subracks
S
Cabinet members
S
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 (Section 3.3.1)
Cabling subdivided into line groups?
Supply cables (230 to 400 V) and signal lines laid in separate ducts or
bundles?
Equipotential bonding (Section 3.3.2)
With a separate arrangement, check that the equipotential bonding
conductor has been correctly laid.
Shielding of cables (Section 3.3.3)
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 (Section 3.3.4)
Are contactor coils which are switched via contacts, fitted with
quenching elements?
Installation Guidelines