Siemens ET 200pro - Page 104

Connection
4.10 Connecting the IM 154-4 PN High Feature Interface Module with CM IM PN PP FO
ET 200pro distributed I/O system
104 Operating Instructions, 03/2013, A5E00335544-08
Required accessories
● Preassembled cables with push-pull cable connector for 1L+/2L+ and SC RJ. The cables
are available in various lengths from appropriate manufacturers.
● If you are fabricating your own cables:
– 5-wire cable and push-pull cable connector for 1L+/2L+
– Fiber-optic cable (IE POF standard cable, IE POF trailing cable) and push-pull cable
connector for SC RJ
Note
Refer to the manufacturer's documentation if you are fabricating the cables with the
push
-pull cable connectors.
Rules for the structure of a fiber-optic cable network
Note the following for fiber-optic networks with devices having integrated fiber-optic
interfaces:
● The fiber-optic network can only be configured as a line.
● If you remove the fiber-optic cable from an integrated fiber-optic cable interface or if the
power supply for the interface module fails, then the downstream devices are also no
longer accessible!
● The fiber-optic cable may have the following maximum lengths:
– IE POF standard cable: 50 m
– IE POF trailing cable: 50 m
Bending radius for the fiber-optic cable
When installing the fiber-optic cable, make sure not to exceed the permissible bending
radius:
● IE POF standard cable: 150 mm
● IE POF trailing cable: 60 mm
Refer also to the installation guidelines for fiber-optic cable in the
ET 200 Distributed I/O
System
Manual or SIMATIC NET - PROFIBUS Networks Manual.
Reusing fiber-optic cable
Note
If you are reusing fiber
-optic cable, you must shorten both fiber-optic cores by the amount of
the curved lengths and reinstall the cable connectors. This will prevent any attenuation
losses caused by re
-bent, heavily-stressed portions of the fiber-optic cores.