Siemens SIMATIC S7-400H System Manual page 351

Cabling
The entire cabling is routed
within a building
No cable junction is required
between the indoor and
outdoor area
The necessary cable length
is available in one piece.
There is no need to connect
several cable segments by
means of distribution boxes.
Convenient and complete
installation using patch
cables
Installation using distribution
boxes, see Fig. 18-2
S7-400H
System Manual, 03/2012, A5E00267695-11
Components required
including patch cables for indoor
applications as required
Patch cable for indoor applications
One distribution/junction box per branch
Installation and patch cables are
connected via the distribution box. Either
ST or SC plug-in connections can be
used, for example. Check the cross-over
installation when you wire the CPUs.
Synchronization modules
18.3 Selecting fiber-optic cables
Specification
1 cable with 4 cores per fault-tolerant system
Both interfaces in one cable
1 or 2 cables with several shared cores
Separate installation of the interfaces in order to
increase availability (reduction of common
cause factor)
Connector type ST or SC, for example, to match
other components; see below
Further specifications you may need to observe
for your plant:
UL approval
Halogen-free materials
Avoid splicing cables in the field. Use
prefabricated cables with pulling protection/aids
in whiplash or breakout design, including
measuring log.
Connector type LC on ST or SC, for example, to
match other components
Connector type ST or SC, for example, to match
other components
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