Siemens S5-135U/155U EMC Measures Connection of inactive parts Section, Routing of cables Section

Installation Guidelines

3.3.5Checklist for the Electromagnetically Compatible Installation of Control Systems

EMC Measures

Connection of inactive parts (Section 3.2)

Check, in particular, the connections on:

SSubracks

SCabinet members

SShield and protective conductor bars

Notes

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?

System Manual	3-19
C79000-G8576-C199-06