Festo VTSA Series Description page 95

3. Installation
Festo P.BE−VTSA−44−EN en 0905e
On the pneumatic supply plate of the outside right
pressure zone if the valve terminal is equipped with
an end plate of type VABE−...RZ−...B1.
For every additional pressure zone:
On the pneumatic supply plate that lies within the corre
sponding pressure zone.
The position of the supply plate within the pressure zone
(left, centre or right) is arbitrary.
Ports (12) or (14) on the right end plate are for valve ter
minals with pilot control by means of external pilot air supply.
By mounting an additional supply plate within a pressure
zone you can provide additional supply air or extract exhaust
air.
3−19