Festo VTSA-F-CB Manual page 16

Product overview
– exhausting the pilot pressure
– sensing of the exhausted status with a pressure switch in the pilot control
The switching signal of the pressure switch is sent to the CPX terminal.
Switch-on process/pressurisation
Fig. 6: Switch-on behaviour of soft start valve
1
Pilot pressure
2
Working pressure
3
Switching voltage of solenoid coil 12 and
LED
Time Description
t Electrical control signal of the valve active
0
t Dead time until filling of duct (1)
1
t Switching point from exhausted state to pressurised state in duct (1)
2
t Pilot pressure in duct (14) reaches operating pressure p
3
t Working pressure in duct (1) reaches half operating pressure p
4
t Working pressure in duct (1) reaches full operating pressure p
5
16
1
3
4
2
4
Switching signal of the pressure switch and
LED
Festo — VTSA-F-CB — 2021-06a
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B