Festo MPA-ASI Series, Manual

Page: 127 / 208

4. Commissioning
4−21
Festo P.BE−MPA−EN en 0802c
4.7.2 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 pneum.
operating status Requirement Comment
Free of leakage Tubing connected with care
Regulated pilot air supply
Fast reaction Sufficient pressure supply by means
of pressure supply modules Exhaust the MPA−S valve terminal via
all the exhaust plates or via the large
surface−mounted silencer
Faultless Non−return valves in common
exhaust line This applies when several systems
with centrally ducted exhaust are
used
Two or more
pressure zones Limiting the pressure zones by
means of isolating seals with
blocked channels
Appropriate number of pneumatic
supply plates for the various
pressure zones.
Subsequent conversion possible
(seechapter 5)
Vacuum or low−
pressure operation Externally supplied regulated pilot
air (3
Ū
8 bar)
Vacuum/low−pressure operation not
with 3/2−way valves
EMERGENCY STOP of
pressure zones Guaranteeing the controller function
for the pilot air despite the complete
supply being switched off The controller regulates the pilot air
supply to all the valve plates on an
MPA−S valve terminal
Slow start−up after
EMERGENCY STOP If there are control signals, the pilot
air must have a pressure of 3
Ū
8 bar
immediately after being switched on
Tab.4/12: Pneumatic operating states