Siemens SIMATIC NET PROFIBUS - Manual (Page 317)

SIMATIC NET PROFIBUS PCF Fiber Optic Standard Cable
Page 3
General Instructions for Working with
SIMATIC NET PROFIBUS PCF Fiber Optic Cables
Please note the following instructions to avoid damage to cables:
F
Make sure that the selected cable is suitable for the area of application.
You should, for example, check the following:
– Required temperature range
– Resistance of the jacket materials to chemicals, water, oils, rodents etc.
to which the cable may be exposed in your application
– Required mechanical properties (bending radii, tensile strength, transverse compressive
strength)
– Required behavior of the cable in fire
– Suitability of the cable including the connectors for the devices to be interconnected
If necessary, use a special cable that meets your requirements. Your SIMATIC NET contact in your
local Siemens branch will be happy to advise you.
F
Never exceed the maximum permitted loads (tensile load, transverse compressive load etc.)
specified in the data sheet of the cable you are using. Excessive transverse compressive load can,
for example, result by using screw clamps to secure the cable.
F
Always use the pulling loop to pull in the PCF standard cable. Never pull in the cable by the
connectors or stripped cords.
F
Only use PCF fiber-optic cables with devices approved for this FO cable type. Keep to the maximum
permitted cable lengths.
F
When cutting cables to length, make sure that no loops are formed and that the cable is not twisted.
Loops and torsion under tensile load can cause kinks or cracks that may mean irreparable damage to
the cable.
F
Follow the steps outlined in these instructions.
F
Make sure that the outer jacket and buffers of the cable are not damaged.
F
Never insert contaminated connectors in the device sockets. The optical transmitter and receiver
elements could otherwise be destroyed.
F
When fitting the cable to connectors make sure that the transmitted and received data are crossed in
the cable.