Festo MPA-FB Series, Manual

Page: 95 / 168

4. Commissioning
4−17
Festo P.BE−MPA−EN en 0502b
4.5.2 Operating states of the pneumatic system
The following conditions should be fulfilled, in order that the
desired pneumatic operating states listed below can be
achieved:
Desired pneuma
tic operating sta
tus Prerequisites Remarks
free of leakage tubing connected with care
closed−loop regulated auxiliary
pilot air
fast reaction sufficient pressure supply via pres
sure supply points
·
Exhaust the MPA valve terminal via
all the exhaust plates or via the
large surface−mounted silencer
faultless Non−return valves in common ex
haust line This applies when several systems
with centrally ducted exhaust are
used
two or more pressure
zones Limiting the pressure zones by
means of sheet seals with blocked
channels subsequent conversion possible (see
chapter 5)
Vacuum or low−pres
sure operation externally supplied closed−loop regu
lated auxiliary pilot air (3 ... 8 bar) Vacuum/low−pressure operation
not with 3/2−way valves
EMERGENCY STOP of
pressure zones Guaranteeing the controller function
for the auxiliary pilot air despite the
complete supply being switched off The controller regulates the auxiliary
pilot air of all the valve plates on an
MPA valve terminal
Slow start−up after
EMERGENCY STOP If there are control signals, the auxi
liary pilot air must have a pressure of
3 ... 3...10 bar immediately after
being switched on
Table4/9: Pneumatic operating states