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Inst Tools > Blog > Practical Questions > Draw a ladder logic circuit for the electric motor of an air compressor ?

Draw a ladder logic circuit for the electric motor of an air compressor ?

Last updated: April 13, 2019 10:48 am
Editorial Staff
Practical Questions Instrumentation Design
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Draw a ladder logic control circuit for the electric motor of an air compressor, controlled by two pressure switches: one switch turns the motor on when the pressure falls to 80 PSI, while the other switch turns the motor off when the pressure rises to 105 PSI:

Draw Electric Motor Ladder Logic

Be sure to include the overload (OL) contact in the 120 volt control circuit (L1 & L2), and include a manual on/off switch as well.

Answer :

Motor ladder Logic

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Credits : by Tony R. Kuphaldt – under CC BY 1.0

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1 Comment
  • HY says:
    April 3, 2022 at 4:11 pm

    auxiliary contact of “M” to be paralleled with ON/OFF switch & contact of “80 PSI” to be “NO contact” .

    Reply

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