Festo VTSA Series, Manual

Page: 71 / 166

3. Installation
3−11
Festo P.BE−VTSA−44−EN en 0601a
3.3.2 Pilot control of the valve solenoid coils (pilot air)
Please note
·
The type of pilot control (internal or external pilot air) is
determined by the right−hand end plate.
Internal pilot air If the operating pressure lies within the required pilot pres
sure range for the valves (see appendix A, Tab.A/4 and
Fig.A/1), you can operate the pilot control of the valve sole
noid coils with internally branched pilot air. The pilot air is
branched here from supply channel 1.
Please note
·
Internal pilot air is also branched centrally for all valve
solenoid coils from supply connection 1 when the VTSA
valve terminal is equipped with several pressure zones.
Internal pilot air If the operating pressure lies within the required pilot pres
sure range for the valves (see appendix A, Tab.A/4 and
Fig.A/1), you can operate the pilot control of the valve sole
noid coils with internally branched pilot air. The pilot air must
be supplied via the pilot connection 14.