Manual Override (Mo) - Festo VTSA-44-MP Series Manual

4. Commissioning
External pilot
supply air
branched after the
soft-start valve
branched in front of the
safety start-up valve
Tab. 4/1: Effects of slow start-up pressurisation
4.2

Manual override (MO)

4-6
The table below shows the effects of gradual start-up pressur-
isation when there are electric signals:
Pressure rise in Pressure rise
overall supply in the pilot
air (12/14)
slowly slowly
slowly fast
You should use the manual override especially when commis-
sioning the pneumatic system, in order to check the function
and operation of the valve or the valve-actuator combination.
By actuating the manual override, you can switch the valve
without an electric signal. You only need to switch on the
compressed air supply.
Time when a Movement of
valve reverses the actuator
after pressure fast
rise at (1)
before pressure slowly
rise at (1)
Festo P.BE-VTSA-44-EN en 1101f