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Automating Manufacturing Systems - Process Control and ...

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discrete sensors - 4.37<br />

PNP. Redraw the sensor using the correct symbol for the sourcing or sinking sensor chosen.<br />

24Vdc<br />

inputs<br />

+<br />

24VDC<br />

V+<br />

-<br />

0<br />

1<br />

2<br />

optical<br />

sensor<br />

V+<br />

NPN<br />

PNP<br />

V-<br />

3<br />

4<br />

5<br />

6<br />

7<br />

4. A PLC has three NPN <strong>and</strong> two PNP sensors as inputs, <strong>and</strong> outputs to control a 24Vdc solenoid<br />

<strong>and</strong> a small 115Vac motor. Develop the required wiring for the inputs <strong>and</strong> outputs.

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