2Overview
28 Festo – P.BE-MPA-EN – 1309f – English
Mounting of the electrica l supply plate is desc ribed in the VMPA-FB-SP-...-V-... assembly
instructions.
2.4.7 Pressure zone separation
The MPA-S valve terminal can be equipped with pressure zones.
The pressure zones are formed either by special sub-bases or by special separating seals.
Pressure zone separation of the pilot channels (12/14) and (82/84) is not intended, as on
the MPA-S valve terminal the pilot air supply fo r pilot control of the valves is supplied
centrally via the corresponding electrical interface (pneumatic interface, multiple con-
nector plate, A S interface or CPI interface).
Pressure zone separation with sub-bases
Sub-base for the proportional pressure
regulator
Sub-bases to the valves
The sub-base (type VMPA-...) for t he proportional
pressure regulator always has a pressure zone
separation, which is not therefore explicitly
marked on the exterior of the sub-base. Pressure
zone separation takes place:
– for the channel (1) on the left side of the
sub-base
– channels (3) and (5) on the left and the right
side of the sub-base.
If the proportional pressure regulator is to
regulate the operating pressure for the valves on
theMPA-Svalveterminal,thevalvesmustbe
positioned to the right of the proportional
pressure regulator.
On the sub-bases with integrate d pressure zone
separation, the separation is made in the centre
of the sub-base, i.e. for
– MPA1: after the second valve position
– MPA2: after the first valve position.
The sub-bases are available in the following
designs:
– only supply channel (1) separated
– supply channel (1) and exhaust ducts (3) and
(5) separated
The sub-bases with integrated pressure zone
separation are marked with notches. By means of
the marking, you can detect the sub-base variant
with which your v alve terminal is equipped
( Tab. 2.8).
Tab. 2.7 Pressure zone separation with sub-bases
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