Purge Air Switching; Preparing Linear Actuators For Commissioning - Siemens SIPART PS2 Compact Operating Instructions

5.5

Purge air switching

When the enclosure is open, the purge air switch above the pneumatic terminal strip on the pneumatic block can be
accessed.
● In the IN position, the enclosure is flushed from inside with a small volume of clean and dry instrument air.
● In the OUT position, the purge air is directly directed towards outside.
①
Purging air selector
②
Pneumatic connections Y1, PZ and Y2
Figure 5-1 Purge air switch on the pneumatic block; view of the positioner on the pneumatic connection side when the
cover is open
The factory setting is the "IN" position.
5.6 Commissioning linear actuators
5.6.1

Preparing linear actuators for commissioning

Requirements
You have already installed the positioner using the suitable mounting kit.
Setting the transmission ratio selector
Note
Commissioning
The setting of the transmission ratio selector is extremely important to commission the positioner.
Stroke [mm]
5 ... 20
15 ... 35
30 ... 130
1. Move the carrier pin on the lever. Select the scale position equal to the nominal stroke or a next-higher position.
2. Tighten the carrier pin using the M6 hexagon nut.
Connecting the positioner
1. Connect a suitable current or voltage source. The positioner is now in the "P manual mode". The current potentiometer
voltage (P) in percent is shown in the upper line of the display, e.g.: "P12.3", and "NOINI" blinks in the lower line:
2. Connect the actuator and the positioner to the pneumatic lines.
3. Supply the pneumatic auxiliary power to the positioner.
26
Lever
Short
Short
Long
Position of the transmission ratio selector
In [°]
33
90
90
Position
Down
Up
Up
SIPART PS2 (6DR5...)
A5E03436620-04, 02/2014