Appendix; Operation With Boosters; A.1 Operation With Boosters - Siemens SIPART PS2 Operating Instructions Manual

Appendix

A.1

Operation with boosters

Introduction
In order to shorten the travel times, it is possible to use a booster between the positioner and
actuator. The booster increases the air performance.
With single-acting positioners you require a booster which must be connected to the air output
Y1. With double-acting positioners you require two boosters which must be connected to the
air output Y1 and to Y2.
NOTICE
Avoid pressure variations
Ensure pressure variations do not occur in the supply air PZ on the positioner due to the
booster.
NOTICE
Note when selecting the boosters:
● Only boosters may be used which do not have a continuous air consumption in the setpoint
● The boosters must not have a follow-up time.
A stable operating state will not be reached if these two points are not observed. All process
components involved are subject to faster wear.
Procedure
1. Reduce the air performance. To do this, use the restrictors on the positioner.
2. Set the deadband "DEBA" to the largest value permissible for your process.
3. Start the initialization process.
4. If necessary, adjust the travel times during the initialization process.
If the process value on the display does not remain stable or if a constant manipulated variable
cannot be achieved for a constant setpoint, further optimization of the controller data is
necessary. This is described in section "Optimization of controller data (Page 110)".
See also
Sequence of automatic initialization (Page 116)
SIPART PS2 with PROFIBUS PA
Operating Instructions, 02/2016, A5E00127926-AB
input.
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