Introduction to Industrial Automation

FIRST SOLUTION BASED ON THE EMPIRICAL METHOD

For an engineer with relatively little experience in automation projects, it would be easy to design 

an automation circuit like the one shown in Figure 4.26. The timer contact C

1

 is the delay output 

of an off-delay pneumatic timer mechanically mounted on the relay C

1

. For this reason, there is 

no electronic timer in the automation circuit as an independent device under possible activation.

N

C

1

R

b

0

C

5

C

4

T

Τ

C

1

C

2

C

2

C

3

C

3

C

4

C

4

H

4

C

5

C

1

C

2

C

3

PS

1

PS

2

PS

3

C

1

C

2

C

3

H

1

H

2

H

3

Figure 4.24  The automation circuit extracted from the component state diagram of Figure 4.23.

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Logical Design of Automation Circuits 

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