Siemens SIMATIC ET 200AL System Manual page 2228

Interference-free cable routing
3.1 Classifying cables into cable categories
The following table shows the minimum clearance you must maintain when installing cables.
Table 3- 2
Category A
Category B
Category C
If you install different cable categories in the same cable channel, use metallic cable
channels with metallic partition.
The following figure show a schematic view of a cable channel with partition.
①
②
Figure 3-1
10
Combination of cable categories
Category A
In common bundles
•
or cable channels
In separate bundles
•
or cable channels
(no minimum
clearance
necessary)
Inside cabinets in separate bundles or cable
•
channels
Outside cabinets, but inside buildings, on
•
separate cable racks with at least 10 cm
clearance
Metallic cable channel
Metallic partition
Cable channel with partition
Category B
In separate bundles
•
or cable channels
(no minimum
clearance
necessary)
In common bundles
•
or cable channels
Function Manual, 06/2014, A5E03461486-AB
Category C
Inside cabinets in separate
•
bundles or cable channels
Outside cabinets, but inside
•
buildings, on separate cable
racks with at least 10 cm
clearance
In common bundles or cable
•
channels
Designing interference-free controllers