BMW E65 User Manual download pdf (Page 22)

E65 Bus Systems

Easy to Work With. The fiber (core) is approximately 1 mm thick and easier to handle

than glass optical fiber with a thickness of approximately 62.5 µmm, for example. In com-

parison with a glass fiber-optic cable, it is considerably easier to handle. The simplest way

of putting it is that glass breaks and plastic doesn't.

Processing. The optical fiber material used by BMW is polymethyl methacrylate

(PMMA) which, in comparison with glass optical fibers, is relatively easy to cut, smooth

down or melt - which offers major advantages with regard to the production of wiring looms

and in repair work.

Economical Costs. All of the above characteristics of plastic fiber-optic cables ultimately

make them relatively cheap to connect to transmitters and receivers (connectors, casings).

The ease with which the fiber ends can be prepared makes assembly and installation in

the field in particular very economical to perform.

Structure of a Fiber-Optic line

(1) Insulation

(2) Cladding

(3) Fiber core

KT-7687

KT-8939

Light source provided

by control unit transmitter

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BMW E65 User Manual Page 22