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■ TRADITIONAL SYSTEM
A traditional electrical system with features of
high flexibility, which is easily configured and
expanded as a function of the many different
needs of the user is characterised by great
circuital complexity and so structured that each
function refers to separate and dedicated wiring.
This clearly involves a considerable increase
in installation time and may be a limitation in
modifying or adding new functions when working
in existing buildings. The problem of laying large
amounts of wire, which in some cases implies
considerable masonry work, should not however
be underestimated.
■ TRADITIONAL SYSTEM
In a building made with traditional wiring, commanding two
different lights from several points implies the laying of a
considerable number of conductors.
The addition, then, of a new command point inside the same
box considerably increases the complexity of the wiring and
reduces the room inside the box itself.
■ BUS SYSTEM
The solution to the system problems described
is represented by the new digital technologies
which can replace traditional equipment by
“intelligent” devices which can communicate with
each other.
Each device in fact has an intelligent circuit which
can process information and send it to the other
devices.
The means of transmitting information
between the various devices is called a BUS,
and in practice it is made up of a plaited pair
which simultaneously supplies and exchanges
information between the various devices
connected in parallel.
■ BUS SYSTEM
The same room instead, wired with BUS wiring, can obtain
the same operating functionality, but with a considerable
saving in conductors (just a telephone pair).
Modification of the command points or the modes of working
does not involve modifying the wiring but just the simple
configuration of the same device.
GENERAL GENERAL FEATURES FEATURES 17
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