Siemens SIPART PS2 Notice De Service page 13

Procedure for installing the plastic hose on the gland
1. Unscrew the sintered bronze attenuator from the exhaust air opening at the bottom side of the enclosure.
2. Screw in the aforementioned gland into the exhaust air opening.
3. Install the aforementioned plastic hose into the gland and check whether it fits firmly.
4. Fasten the plastic hose with a cable tie onto the control valve such that the opening points downwards.
5. Ensure that the plastic hose does not have any kinks and the exhaust air flows out without any hindrance.
Positioners subjected to fast acceleration or strong vibration
Notes on use
The electropneumatic positioner has a friction clutch and a switchable gear. The positioner can therefore be universally used
on part-turn and linear actuators. As a result, you need not follow the zero point in case of part-turn actuators and a
symmetrical mounting in case of linear actuators. The working area can be set later using the friction clutch.
The switchable gear also allows you to adjust the positioner to small or large strokes.
Strong acceleration forces act on control valves that are subjected to heavy mechanical loads, e.g. breakaway valves,
strongly shaking or vibrating valves, as well as in case of "vapor shocks". These forces may be much higher than the
specified data. This may move the friction clutch in extreme cases.
The positioner is equipped with an arrester device for the friction clutch in order to counter these extreme cases. The setting
of the transmission ratio selector can also be arrested. This prevents a displacement due to extreme accelerations or strong
vibrations. These setting options are marked using additional signs and symbols.
Friction clutch
①
Arrester device
②
Unplug
③
Friction clutch
④
Lock
Figure 3 Arrester device and lock
SIPART PS2 (6DR5...)
A5E03436620-01, 03/2011
Arrester device
Transmission ratio selector
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