Siemens Acvatix SAX Series Basic Documentation page 54

Positioning times stroke
model
Notes
54 / 92
Siemens
Building Technologies
The specified positioning times refer to the respective nominal stroke / nominal
angular rotation. 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 SAX.. / SAV..
B VVF.. / VXF.. valves with 20 / 40 mm nominal stroke = k
A...B Internal end position of VVF.. / VXF.. valves with 20 / 40 mm nominal stroke
Deviations occur...
· after several positioning signals Y1 and Y2 in the same direction since the stroke
movement starts with a delay of 300 ms.
· when positioning signals Y1 and Y2 are active for less than 300 ms since the
stroke movement cannot be made in that case.
A
Calculated position Actual position
Accurate position feedback is made possible with the help of a potentiometer
(page 75).
Actuators SAX.., SAY.., SAV.., SAL.. for valves
Functions and control
Positioning time [sec]
B C
Positioning
time [ms]
- value reached
vs
Y1 Y2
Positioning signals No power
(power applied) applied
0
CE1P4040en
2018-12-05