Modulating Control - Siemens Acvatix SAS31.03 Manual

Positioning signal
Signal Y, Z increasing
Signal Y, Z decreasing
Signal Y, Z constant
No voltage at Y1 and Y2;
with fail safe function
Note
Siemens
Building Technologies
4.2

Modulating control

The modulating positioning signal
drives the actuator steplessly. The
positioning signal range
(DC 0...10 V / DC 4...20 mA /
0...1000 Ω) corresponds in a linear
manner to the positioning range (fully
closed...fully open, or 0...100 %
stroke).
The actuator is controlled via terminal
Y or forced control Z (page 30). The
desired stroke / the desired rotation is
transferred to the valve stem / the
valve spindle.
Stroke actuator
Actuator's stem extends
Actuator's stem retracts
Actuator's stem maintains the
position
Actuator's stem retracts
Observe the information given in chapter 4.2.1 Positioning signal and flow
characteristic selection on page 26.
Actuators SAS.., SAT.. for valves
Functions and control
1
2
3
4
5
6
7
8
Rotary actuator
Actuator's spindle turns in
clockwise direction
Actuator's spindle turns in
counterclockwise direction
Actuator's spindle maintains
the position
Actuator's spindle turns in
counterclockwise direction
Calibration slot
LED (2 colors)
DIL Changeover of characteristic
switches
Positioning signal
A/D conversion
Power supply
Identification of seat
Position control
Motor control
Detection of foreign bodies
Control
functions
Calibration
Forced control
Characteristics function
Manual adjustment
Brushless DC motor
Gear train
Fail safe function
Manual adjuster
Control path valve Bypass valve
B à AB
AàAB
Opening Closing
Closing Opening
Maintains the position
Closing Opening
25 / 50
CE1P4041en
2015-05-19