31 / 60
Siemens
Actuators SAS.., SAT.. for valves
CE1P4041en
Smart Infrastructure
Functions
and control
2019-04-09
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.
1
Calibration slot
2
LED (2 colors)
3
DIL
switches
Changeover of characteristic
Positioning signal
4
A/D conversion
5
Power supply
6
Control
functions
Identification of seat
Position control
Motor control
Detection of foreign bodies
Calibration
Forced control
Characteristics function
Manual adjustment
7
Brushless DC motor
8
Gear train
Fail safe function
Manual adjuster
Positioning signal
Stroke actuator
Control path valve
A
à
AB
Bypass valve
B
à
AB
Signal Y, Z increasing
Actuator’s stem extends
Opening
Closing
Signal Y, Z decreasing
Actuator’s stem retracts
Closing
Opening
Signal Y, Z constant
Actuator’s stem
maintains the position
Maintains the position
No voltage at Y1 and
Y2; with fail safe
function
Actuator’s stem retracts
Closing
Opening
Observe the information given in chapter 4.2.1 Positioning signal and flow
characteristic selection on page 31.
Note