Festo VTSA Series Description page 89

3. Installation
Internal pilot air supply
External pilot air supply
Festo P.BE−VTSA−44−EN en 0905e
If the operating pressure lies within the required pilot pres
sure range for the valves (see Appendix A, Tab. A/6 and
Fig. A/1), you can operate the pilot control with an internally
branched pilot air supply. The pilot air is branched here from
supply duct (1).
Note
The internal pilot air supply is also branched centrally
·
from supply port (1) if the VTSA... valve terminal is
equipped with several pressure zones.
If the operating pressure lies outside the required pilot pres
sure range for the valves (see Appendix A, Tab. A/6 and
Fig. A/1), you must operate the pilot control with external
pilot air. The pilot air must be supplied via pilot port (14).
Note
External pilot air is supplied centrally via pilot port (14)
·
on the right end plate. This also applies when the valve
terminal is operated with different pressure zones (see
Fig. 3/3).
Set the pilot pressure according to the specifications in
·
Appendix A, Tab. A/6 or in the diagrams Fig. A/1.
Check which pilot variant your valve terminal has been de
signed for (see Chapter 1.1.2, section Pilot control (pilot air
supply)").
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