Siemens SIMATIC S7-400H - Page 352

Synchronization modules
18.3 Selecting fiber-optic cables
S7-400H
352 System Manual, 03/2012, A5E00267695-11
Table 18- 3 Specification of fiber-optic cables for outdoor applications
Cabling Components required Specification
 Installation cables for
outdoor applications
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 approval
 Halogen-free materials
Further specifications you may need to observe for
your plant:
 Protection against increased mechanical stress
 Protection against rodents
 Water-proofing
 Suitable for direct underground installation
 Suitable for the given temperature ranges
Avoid splicing cables in the field. Use prefabricated
cables with pulling protection/aids in whiplash design,
including measuring log.
 including patch cables for
indoor applications as required
 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.
A cable junction is required
between the indoor and
outdoor area
see Figure 18-2
 Patch cable for indoor
applications
 Connector type LC on ST or SC, for example, to
match other components