Moniteur 50 Series SMART Positioners - Manual (Page 22)

Design and Method of Operation
2-4
Positioner SIPART PS2/SIPART PS2 PA
C79000-G7476-C150–01
2.2.3 Pneumatic connections
The pneumatic connections (G1/4) are located on the right-hand side of
the positioner (Fig. 2-3).
Outlet air E with silencer on the underside of the instrument
Positioning pressure Y1 for single and double–acting actuators
Positioning pressure Y2 for double–acting actuators
Inlet air P
Z
Feedback shaft
Fig. 2-3 Pneumatic connection
Two pneumatic connections for the integrated installation of single–ac-
ting linear actuators are located on the rear of the positioner:
❑ Positioning pressure Y1
❑ Air outlet E
These connections are locked with screws when supplied (see Fig. 3-2
and Fig. 3-4).
Outlet air E is used to ensure a flow of dry instrument air through the
pick–off area and the spring chamber to prevent corrosion.
Fig. 2-4 shows pneumatic connection options for various types of ac-
tuators with the positioning action and the safety position after auxiliary
power failure.