3. Installation
3-9
Festo P.BE-MPA-EN en 1108e
Note
Internal pilot air is branched centrally from the supply
connection (1) in the pneumatic interface or multiple
connector plate. This also applies when the MPA-S valve
terminal is operated with several pressure zones
(see Fig. 3/6).
External pilot air supply If the operating pressure lies below 3 bar or above 8 bar,
pilot control must be carried out with external pilot air.
Note
• Preferably use regulated external pilot air supply.
Reliable faultless operation of the MP A-S valve terminal
is then possible, e.g. even with fluctuating operating
pressure.
• The external pilot air supply for all solenoid coils is fed
centrally via the pilot port (12/14) on the pneumatic
interface or the multi-pin plug connection plate.
This is the case even if the MPA-S valve terminal is
operated with different pressure zones.
• Adapt the external pilot air supply to the operating
pressure at which these valves are operated
(see diagrams in Appendix A, Fig. A/1, Fig. A/2 and
Fig. A/3).
Conversion between internal and external pilot air supply is
described in Chapter 5.4.1.
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