Festo MPA-FB Series, Руководство пользователя

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3. Installation
3−12
Festo P.BE−MPA−EN en 0502b
Please note
·
Use closed−loop regulated external auxiliary pilot air
(3 ... 8 bar). Reliable faultless operation of the MPA valve
terminal is then possible, e.g. even with fluctuating oper
ating pressure.
·
The external auxiliary pilot air is supplied centrally via
pilot connection 12/14 on the pneumatic interface or MP
sub−base for all valve solenoid coils. This also applies
when the MPA valve terminal is operated with several
pressure zones (see appendix A Fig.A/1 and Fig.A/2).
·
Set the external auxiliary pilot air to correspond to the
operating pressure at which these valves are operated
(see diagrams apendix A Fig.A/1 and Fig.A/2).
3.3.2 MPA valve terminal with pressure zone separation
The MPA valve terminal can be fitted with the following
number of pressure zones depending on the connecting vari
ant:
Electrical
connection variant MPA valve terminal with ...
connection variant
CPX terminal MPM connection MP connection
Pressure zones 1 ... 8 1 ... 12 1 ... 2
Table3/2: Number of pressure zones
The pressure zones are formed either by special sub−bases or
by special sheet metal seals.
On the sub−bases with pressure zone separation only supply
channel (1) is separate. Separation is made in the centre of the
sub−base, i.e. on
the MPA1 after the second valve location
the MPA2 after the first valve location.