Siemens SIMATIC ET 200AL, System Manual

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Interference-free cable routing
3.2 Cable routing inside cabinets in buildings
Designing interference-free controllers
Function Manual, 06/2014, A5E03461486-AB
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3.2 Cable routing inside cabinets in buildings
Rule
Observe the following rules for proper cable routing inside of control cabinets:
●
If a crossing of cables is unavoidable, then cross the cables at an angle of 90°, if
possible, in order to keep interference from electrical fields as low as possible.
● Do not route cables coming into the cabinet from outside parallel to the shield supports.
3.3 Cable routing outside cabinets and inside buildings
Rule
Observe the following rules for proper cable routing outside control cabinets and inside
buildings:
●
Read the information in section Assigning cables to cable categories (Page 9).
● If you route the cables in metallic cable channels, you can rearrange the cable channels
next to each other.
● Connect metallically conductive cable racks to the potential equalization of the building.
● If a crossing of cables is unavoidable, then cross the cables at an angle of 90°, if
possible, in order to keep interference from electrical fields as low as possible.