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Fiber
optics are becoming an increasingly popular means of
transmitting data in industrial environment. The combination
of high speed over long distance and being totally immune
to electromagnetic interference makes this medium ideal.
Westermo provide a number of devices and configuration options
for fiber optics, these include ring and bus, point to point and
multi drop networks on RS-232/422/485. The ring configuration is
generally used where a high tolerance to fault conditions is required,
such as safety critical systems on oil rigs or chemical plants.
On a ring system a failure on a set of fibers will not result in
a loss of communications unless 2 or more sets of fibers have been
broken. Multidrop fiber networks like the one shown below can be
used as an alternative to traditional copper based networks such
as RS-485/422 networks. |
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