multiconductor plugs and jacks, the individual
generally identified by pin or pin socket numbers.
e. Indicators. Indicators are generally placed in electrical or
electronic circuits to provide the operator a status of some function
of the equipment. The indicator may be audible, visual, or both.
(1) Audible indicators may consist of a
horn, buzzer, speaker,
or other noise producing device.
these devices are used
as alarms or warnings. Figure 1-20 shows the
symbols for some types
of audible indicators.
are labeled with the
(2) Visual indicators are typically some type of a light, dial,
Visual indicators may provide a warning or present some
type of status. Dials and meters are most often represented by the
symbol shown in figure 1-21 with its accompanying legend.