Additional Instructions On Installing Fiberoptic Cables - Siemens 6GK1 901-1GB01 System Manual

3.3.8.2

Additional instructions on installing fiberoptic cables

Protecting connectors from contamination
Fiberoptic cable connectors are sensitive to contamination. Unconnected male and female
connectors must be protected with the supplied dust caps.
Attenuation variations under load
During installation, fiberoptic cables must not be twisted, stretched or squashed. The
specified limit values for tensile strain, bending radii and temperature ranges must be
adhered to. During installation, the attenuation values can vary slightly, these variations are,
however, reversible providing the strain limits are not exceeded.
Pull cables using cable grips and protect connectors
If the cable does not have a Kevlar pulling attachment, make sure that you use cable grips.
Before fitting the cable grip, make sure that the connectors of preassembled cables are
protected from the pressure exerted by the cable grip, for example using a piece of
protective tube.
Fitting strain relief
Although the BFOC connectors have their own strain relief and kink protection, it is advisable
to arrange for additional strain relief as close as possible to the connected device to protect
against mechanical strain.
Plan adequate attenuation reserves
When installing cables over greater distances, it is advisable to take into account one or
more repair splices in the power loss budget.
Electromagnetic immunity
Fiberoptic cables are immune to electromagnetic interference. Installing cables in cable
channels along with other cables (for example 230 V/380 V power supply cables) causes no
problems. When installing in cable channels, however, make sure that the permitted strain
on the fiberoptic cables is not exceeded when pulling in other cables later.
Keep to the technical specifications
During installation and operation, all mechanical requirements for the cable such as
bending radii, tensile strain etc. must be kept to. If these are exceeded, there may be
deterioration of the transmission characteristics that can lead to temporary or complete
failure of the data transmission.
Passive network components
System Manual, 02/2013, C79000-G8976-C282-01
3.3 Guidelines for setting up networked automation systems in buildings
WARNING
Installing network components in cabinets
103