Festo MPA-ASI Series, Manual

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1. Summary of components
1−4
Festo P.BE−MPA−EN en 0802c
1.1 The MPA−S valve terminal
Festo supports your automation tasks at machine level with
the MPA−S valve terminal. The modular structure of the
MPA−S valve terminal enables you to match this valve
terminal optimally to your machine or system.
The valve terminal pneumatics provide the following:
the common channels for supply and exhaust air
the electric signals from all valve solenoid coils.
Work connections 2 and 4 are provided for each valve loca
tion on the individual pneumatic modules. The valves are
supplied with compressed air (operating pressure and pilot
pressure) via the common channels and connections in the
basic components. The exhaust air (from the valves and the
pilot exhaust air) is also exhausted via these common chan
nels. Further components for pressure supply are also avail
able, e.g. in order to supply pressure zones.
The MPA−S valve terminal is equipped with current reduction.
The rated current of the valve solenoid coils is then reduced
after the high−current phase (switching procedure). The cur
rent reduction offers the following advantages:
the MPA−S valve terminal has a lower energy consumption
the power unit for the voltage supply to the MPA−S valve
terminal can be designed more economically depending
on the individual case
the valve solenoid coils have less leakage power and
produce less waste heat.