Figure 5-1 Fiber-Optic Cables, Installation Using Distribution Boxes - Siemens CPU 412-5H Equipment Manual

Assembling
5.2 Selecting fiber-optic cables
Cabling
A cable junction is required be‐
tween the indoor and outdoor
area
Figure 5-1 Fiber-optic cables, installation using distribution boxes
20
Components required
● Patch cable for in‐
door 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 in‐
stallation when you wire
the CPUs.
Specification
Separate installation of the interfaces
in order to increase availability (reduc‐
tion of common cause factor)
● Connector type ST or SC, for exam‐
ple, 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 pre‐
fabricated cables with pulling protection/
aids in whiplash or breakout design, in‐
cluding measuring log.
● Connector type LC on ST or SC, for
example, to match other components
● Connector type ST or SC, for exam‐
ple, to match other components
Synchronization modules for S7-400H
Equipment Manual, 04/2020, A5E50072434-AA