Connecting The Valve Terminal; Pilot Control (Pilot Air Supply) - Festo MPAC-VI Manual

3 Mounting and installation
3.4

Connecting the valve terminal

Connections on the following components are available for pneumatic supply to the valve terminal:
– on the left and right end plate
– on the optional supply plate
– on the optional manifold sub-base VMPAC-AP-14-SP-...
3.4.1

Pilot control (pilot air supply)

The pilot control is supplied with internal or external pilot air, dependent on the equipment of the right
end plate. You can ascertain the pilot control variant for which your valve terminal is equipped by
means of the following key features (è Tab. 3.1).
Pilot control variant
Operation with external pilot air supply
Operation with internal pilot air supply
Tab. 3.1 Recognition features of the pilot variants
Internal pilot air supply
If the operating pressure lies within the required pilot pressure range for the valves (è Appendix A,
Fig. A.1... Fig. A.2), you can operate the pilot control with an internally branched pilot air supply.
Internal pilot air supply is branched centrally from the supply port (1) in the right end
plate. This also applies when the valve terminal is operated with several pressure zones
(è Fig. 3.1).
External pilot air supply
If the operating pressure lies below the required pilot pressure (è Appendix A, Fig. A.1 ... Fig. A.2),
you must operate the pilot control with an external pilot air supply.
• Preferably use regulated external pilot air supply. Reliable faultless operation of the
valve terminal is then possible, e.g. even with fluctuating operating pressure.
• The external pilot air supply is supplied centrally for all solenoid coils via the pilot
airport (12/14) on the right end plate. This is the case even if the valve terminal is
operated with different pressure zones.
• The selector sleeve must be mounted in the right end plate.
• Adapt the external pilot air supply to the operating pressure at which the valves are
operated.
Conversion between internal and external pilot air supply is described in chapter 7.4.
26
Pilot control port (12/14) on the right end plate:
– Open
– Built-in selector sleeve
– Sealed with blanking plugs
Festo – MPAC-VI-EN – 2017-12a – English