PROFINET Installation Guideline for Cabling and Assembly

Laying PROFINET cables
1.5.1 Laying fiber optic PROFINET cables
When exceeding the tensile strength, the fibers may be overstreched,
may cause higher attenuation, may reduce the lifespan or/and may be
permanently damaged. This will cause sporadic or continuous data
communication errors. A failure may occur some time later, e.g. several
years later, after the installation. Special attention needs to be paid to
adhere to the minimum bending radii of the cables. The minimum
bending radius of a PROFINET cable is usually 15 times the diameter
of the cable. Please observer the data sheets of the manufacturers.
1.5.2 Protecting connectors against contamination
• Connectors of fiber optic cables are sensitive to contamination.
• Attach the provided dust protection caps to protect unused connectors and
jacks.
• Clean the end face of the connector prior to connecting it to a device. Use a
lint-free tissue soaked with isopropyl alcohol. Lay the tissue on an even and not
too hard surface. In oder do clean the connector move it in one direction over
the tissue. Repeat the procedure if necessary at a different spot on the tissue.
Inspect the end face with a microscope to ensure the cleaning was effective.
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