Siemens Acvatix SAS Series Basic Documentation page 29

Positioning times stroke
model
Notes
Siemens
Smart Infrastructure
The specified positioning times refer to the respective nominal stroke. Since the
end positions of rotary actuators are inside the actuator, the following remarks refer
to stroke actuators.
The resulting effective strokes vary, depending on the type of valve, resulting in
shorter or longer actuator positioning times.
Legend diagram
A Mechanical end position in actuator
B Valves with 5.5 mm nominal stroke
X Time to override idle stroke (delay time), see glossary
Deviations occur
· after several positioning signals Y1 and Y2 in the same direction since the stroke
movement starts with a delay of 50 ms (SAT31.., SAS31.53, SAS81.33) or 300
ms (SAS31../81..).
· when positioning signals Y1 and Y2 are active for less than 50 ms or 300 ms
since the stroke movement cannot be made in that case
.
Example of an actual position deviation on the SAT31.008 at a 50 ms delay.
A
Calculated position Actual position
Actuators SAS.., SAT.. for valves
Functions and control
Positioning time [sec]
B C
Positioning
time [ms]
Y1 Y2
Positioning signals
No power applied
(power applied)
0
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CE1P4041en
2019-04-09