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Automating Manufacturing Systems - Process Control and ...

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plc wiring - 3.19<br />

temperature<br />

normally open<br />

temperature<br />

normally closed<br />

flow<br />

normally open<br />

flow<br />

normally closed<br />

R<br />

relay contact<br />

normally open<br />

relay contact<br />

normally closed<br />

relay coil<br />

indicator lamp<br />

relay time delay on<br />

normally open<br />

relay time delay on<br />

normally closed<br />

relay time delay off<br />

normally open<br />

relay time delay off<br />

normally closed<br />

H1<br />

H3<br />

H2<br />

H4<br />

horn buzzer bell<br />

2-H<br />

X1 X2<br />

control transformer<br />

solenoid<br />

2-position<br />

hydraulic solenoid<br />

Male connector<br />

normally open<br />

proximity switch<br />

normally closed<br />

proximity switch<br />

Female connector<br />

Figure 3.11<br />

JIC Schematic Symbols

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