Festo MPA Series - Pilot Control (Pilot Air Supply)

3. Installation
3−12
Festo P.BE−MPA−EN en 0910d
3.4.1 Pilot control (pilot air supply)
Depending on the variant of the pneumatic interface,
CPIinterface, multiple connector plate or AS interface,
thepilot control is supplied with internal or external pilot air.
You can ascertain the pilot control variant for which your
MPA−S valve terminal is equipped, by the following features
(see table).
Pilot control variants
Pilot conne cti o n (12/14) on the electrical interface:
Operation with external pilot air marked and open.
Operation with internal pilot air not marked and closed.
Tab.3/1: Recogniton features of the pilot control variants
Internal pilot air supply If the operating pressure lies between 3
... 8 bar, you can
operate the terminal with internally branched pilot air.
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.3/3).
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.