Siemens EF 83H Series Manuel d'utilisateur Page 44

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Connecting the Network
3-6
SIMATIC 505 PROFIBUS-FMS CP User Manual
Cable Routing (continued)
For
in-ceiling routing, cables are usually supported in troughs or with hooks
and clamps every 10 to 15 feet (3 to 4.5 m).
Some advantages of in-ceiling routing are listed below
.
Flexibility
Low-cost installation
Accessibility of cabling
Some disadvantages of in-ceiling routing are listed below
.
Collection of dust and other debris in ceilings
Hazardous working conditions in ceilings
Impracticality for buildings without drop ceilings
Surface duct routing is usually installed along baseboards or attached to
walls at desktop height. While surface duct routing protects cables from
both physical and electro-magnetic effects, it usually requires I/O bases to
be positioned near a wall.
NOTE:
Consult your cable vendor for proper cable-pulling techniques so that
no kinks occur in the cable during installation.
In-Ceiling Routing
Sur
face Duct
Routing
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