Purging Air Switchover; Restrictors - Siemens SIPART PS2 6DR50x0 serie Betriebsanleitung

Operating instructions
6.1

Purging air switchover

The purging air changeover switch above the pneumatic terminal block (Figure 7) on the valve manifold can be
accessed when the housing is open. When the switch is in position IN the interior of the housing is purged with
very small quantities of clean and dry instrument air. In position OUT the purging air is led directly out of the
instrument.
Fig. 7 Purging air changeover switch above the pneumatic terminal block, view of the device on the
pneumatic connection side with the cover open
6.2

Restrictors

To increase the positioning times for fast actuators when necessary, the air flow can be reduced with the restrictors
Y1 and Y2 (only for double-action valves) (Figure 8). Turning the restrictors in the clockwise direction reduces the
air flow until it is shut off. To set the restrictors we recommend closing them first and then opening them again
slowly (see Initialization RUN3). In case of double-action valves please note that both restrictors are set alike.
Fig. 8 Restrictors
56
Hexagon socket 2.5 mm
Y1 Y2
SIPART PS2
A5E00074600-05