10 Fuse
11 Terminal strip
12 Plugs
Different symbols are used to simplify the differentiation of terminal
strips 11
Fig. 58 and plugs (12) in a wiring diagram.
Plugs are mainly used to connect two wiring looms
or to connect a wiring loom with a component with
cable connection and mating plug.
Electronic devices and components are increasingly used in the
construction equipment industry. Controls with software, control
elements (e.g. joystics and man / machine interfaces, such as e.g.
screens, LC-Displays) are frequently used to represent and control
machine functions. The internal construction of such components
is in most cases protected or just too complex to be illustrated in
the wiring diagram within the context of the actual machine func-
tion. There are two different ways to simplify the representation of
such devices in the diagram.
Fig. 59: Example: Central lubrication system
The Black-Box representation shows the device as a Box with the
connections required for the machine function. Connections which
are not needed do not need to be represented.
The Blackbox representation is mainly used if there is no differenti-
ated information (e.g. signals from pins) available from the sub-
supplier.
Representation of electric devices
Black-Box representation
Electric systems – Basic principles
BW 900-50
77
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