Festo VTSA-F-CB Manual page 54

Installation
Line
Port designation
Exhaust air of valves
3/5 or 3 and 5
Pilot control (external pilot air supply)
2)
14
12
Working air or vacuum
2 or 4
1) The valve terminal is already fitted with ports based on the order.
2) The external pilot air is supplied by default via port (14).
Tab. 36: Size of the pneumatic ports
54
1)
Position of the ports
– in exhaust plate
Valve terminal with valves 18 ... 52
mm wide:
– in the right end plate
Valve terminal with valves 18 ... 52
mm wide:
– in the right end plate
in the manifold sub-bases of the
pilot air switching valves
In the manifold sub-bases
Port size
G1/2
End plate size 1: G1/2
End plate size 2: G3/4
G1/4
G1/8
Width 18 mm: G1/8
Width 26 mm: G1/4
Width 42 mm: G3/8
Width 52 mm: G1/2
Festo — VTSA-F-CB — 2021-06a