Siemens SIMATIC PCS 7 CPU 410-5H System Manual page 212

Synchronization modules
12.3 Selecting fiber-optic cables
Table 12- 3 Specification of fiber-optic cables for outdoor applications
Cabling
A cable junction is required
between the indoor and out-
door area
see Figure 12-2
212
Components required
Installation cables for
•
outdoor applications
including patch cables for
•
indoor applications as required
Patch cable for indoor applica-
•
tions
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 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.
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
CPU 410-5H Process Automation
System Manual, 09/2014, A5E31622160-AB