Siemens sipart ps2 Operating Instructions Manual page 14

Electropneumatic positioner

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Fig. 6

Pneumatic connection

Two pneumatic connections for the integrated installation of single--acting linear actuators are located on the rear

of the positioner:

Positioning pressure Y1

Air outlet E

These connections are locked with screws when supplied.

Outlet air E can be used to ensure a flow of dry instrument air through the pick--off area and the spring chamber

to prevent corrosion.

Procedure:

Connect manometer for inlet air pressure and positioning pressure in necessary.

Connection via female thread G 1/4 DIN 45141:

Inlet air 1.4 to 7 bar

Positioning pressure 1 for single-action and double-action actuators

Positioning pressure 2 for double-action actuators

Exhaust output (remove silencer if necessary)

Safety setting on failure of electric supply:

single-action:

Y1 Vented

double-action: Y1 Max. positioning pressure (inlet air pressure)

Y2 Vented

Connect positioning pressure Y1 or Y2 (only with double-action actuators) according to desired safety

setting.

Connect inlet air to PZ.

NOTE

Spring return actuators need sufficient high supply pressure so that the complete stroke can be travelled

up to the end position of the actuator.

SIPART PS2

A5E00074600-05

Positioning pressure Y1 for single and double--acting actuators

Feedback shaft

Inlet air P

Positioning pressure Y2 for double--acting actuators

Outlet air E with silencer on the underside of the instrument

Operating instructions

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