Modulating Control - Siemens Acvatix SAS Series Basic Documentation

Note
Siemens
Smart Infrastructure
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 35). The
desired stroke is transferred to the
valve stem.
Positioning signal
Signal Y, Z increasing
Signal Y, Z decreasing
Signal Y, Z constant
No voltage at Y1 and
Y2; with fail safe
function
Observe the information given in chapter 4.2.1 Positioning signal and flow
characteristic selection on page 31.
Actuators SAS.., SAT.. for valves
Functions and control
1
2
3
4
5
6
7
8
Stroke actuator
Actuator's stem extends Opening
Actuator's stem retracts Closing
Actuator's stem
maintains the position
Actuator's stem retracts Closing
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
AàAB
Closing
Opening
Maintains the position
Opening
B à AB
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CE1P4041en
2019-04-09