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Siemens
Actuators SAX.., SAY.., SAV.., SAL.. for valves
CE1P4040en
Building Technologies
Functions and control
2018-12-05
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.
Strok
e
of
val
ve
-ac
tua
tor com
bin
ati
on
[m
m]
Positioning time [sec]
Legend diagram
A
Mechanical end position in SAX.. / SAV..
B
VVF.. / VXF.. valves with 20 / 40 mm nominal stroke = k
vs
- value reached
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
B
C
Y1
Y2
0
Calculated position
Actual position
Positioning
time [ms]
Positioning signals
(power applied)
No power
applied
Accurate position feedback is made possible with the help of a potentiometer
(page 75).
Positioning times stroke
model
Notes