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Inductive
Proximity switch generates high Frequency alternating field at
the active face by the oscillator circuit. When any metal object
is brought into the field it causes oscillation to stop. Hence
the demodulated voltage feeding the trigger disappears.
DC
Inductive Proximity Switches:
For DC Switches the
trigger operates rapidly when oscillation stops. This trigger
switches the O/P, NPN/PNP transistor to drive an electronic circuit
or relay.
AC
Inductive Proximity Switches:
For
AC switches a thyristor is triggered when oscillation stops. This
thyristor is connected in series with a bridge and this series
combination is connected to the AC Load.
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