Table 15-3 Specification Of Fiber-Optic Cables For Outdoor Applications - Siemens SIMATIC S7-400H System Manual

Synchronization modules
15.3 Selecting fiber-optic cables
Table 15-3 Specification of fiber-optic cables for outdoor applications
Cabling
A cable junction is required
between the indoor and
outdoor area
see Figure 15-2
A cable junction is required
between the indoor and
outdoor area
see Figure 15-2
256
Components required
Installation cables for
•
outdoor applications
including installation cables for
•
indoor applications as required
Patch cable for indoor
•
applications
One distribution/junction box
•
per branch
Installation cables and patch
cables are interconnected by
means of distribution box, using
either ST or SC connectors for
example.
Check the cross-over installation
when you wire the CPUs.
Specification
Installation cables for outdoor applications
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 certification
•
Halogen-free materials
•
Observe further specifications as required for local
conditions:
Protection against increased mechanical stress
•
Protection against rodents
•
Water-proofing
•
Suitable for direct underground installation
•
Suitable for the given temperature ranges
•
Avoid spliced cables in the field. Use prefabricated
cables with pulling protection/aids in whiplash design,
including measuring log.
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 certification
•
Halogen-free materials
•
Avoid spliced 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
System Manual, 09/2007, A5E00267695-03
S7-400H