Operating instructions

Description
3.4 Device components
SIPART PS2 with and without HART communications
Operating Instructions, 09/2008, A5E00074631-08
29
3.4.5 Purge air switching
Note
Equipment
Versions with flameproof enclosures are not equipped with 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.
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Figure 3-13 Purge air switch on the pneumatic block; view of the positioner on the pneumatic
connection side when the cover is open
① Purge air switch
② Pneumatic terminal strip