4. Commissioning
4-4
Festo P.BE -CPVSC-EN en 0112NH
1
42
53
14 12
1
2
1 Externally supplied auxiliary pilot air (3 to 7 bar)
2 Safety start-up valve (slow build up of pressure of
complete supply)
Fig. 4/1: Example of valve-cylinder c ombination with slow
increase in pressur e of the complete supply
The table below shows the effects of slow start-up pressuriza-
tion when there are electric signals.
External auxili-
ary pilot air
Pressure
increase in
complete
supply
Pressure
increase in the
auxiliary pilot
air (12/14)
Time of
switching
point of a
valve
Movement of
the cylinder
Branched after the
safety start-up
valve
slow slow after pressure
increase w ith (1)
fast
Branched in front
of the safety
start-up valve
slow fast before pressure
increase w ith (1)
slow
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