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Siemens
Electromotive actuators for combi valves
CE1N4833en
Building Technologies
2017-11-15
Position feedback U (DC 0…10 V) is always proportional to stroke H for the actuator. It
is also active when using the AC 230 V module ASP1.1.
DIL switch
Flow characteristics
Position feedback U
lin = linear
1)
log = equal percentage, n
gl
= 3
(logarithmic normal)
log = equal percentage, n
gl
= 3
(exponential normal)
1)
Factory setting
The actuator travels to the applicable end position (the stem retracts or extends
depending on the model) using the preloaded spring if operating voltage to terminal G
or L is lost or shut down. In this case, the actuator's control function is locked for 45
seconds (both LEDs are green) to reach the end position at any rate. There is no
recalibration. The reset positioning speed ensures that no pressure surges occur in the
piping.
SQV91P30 Actuator stem retracted
Combi valve opened (V = 100%).
SQV91P40 Actuator stem extended
Combi valve closed (V = 0%).
Recalibration can be manually triggered any time.
1. Operating voltage is supplied.
2. Engage and disengage the manual adjuster twice within 4 seconds.
3. Both LEDs flash green.
4. Recalibration is successful when both LEDs are lit green.
5. Return to normal control function.
∂
Position feedback U is inactive or corresponds to value "0".
∂
The shortest possible runtime is initialized.
∂
Recalibration is valid only after the entire process is completed.
∂
Additional engaging the manual adjuster interrupts the process.
The valve actuator indicates detected blockage by setting the feedback signal to 0 V
after ca. 90 seconds. The actuator, however, tries to overcome the blockage during this
period. Normal control function is reactivated if the blockage is overcome and position
feedback U is once again available.
Position feedback U
Fail-safe function
End position
Recalibration
Notes
Blockade detection
