Data Sheet for Product

5
Siemens
A6V12986007_de--_b
2022-02-07
Some controllers drive the thermal valve actuators via PDM/TPI signals. This increases the
response time. For optimal control, the ambient temperature must be <40 °C.
Pulse-duration modulation/Time Proportional Integral
Position indication
The movement and actual position of the actuator stem is
indicated by the yellow stroke indicator.
The yellow part indicates:
● The actuator stem is extended.
● NC valve is closed.
● NO valve is opened.
Type summary
Type Stock no. Position de-
energized
1)
Operating voltage Positioning time Connecting cable
STA121 S55174-A177
NC
AC/DC 24 V 270 s
1 m
STA121.L20 S55174-A181 2 m
STA121.L20H
2)
S55174-A195 2 m
STA121.L50 S55174-A185 5 m
STA321 S55174-A178
AC 230 V 210 s
1 m
STA321.L20 S55174-A182 2 m
STA321.L20H
2)
S55174-A196 2 m
STA321.L50 S55174-A186 5 m
STP121 S55174-A179
NO
AC/DC 24 V 270 s
1 m
STP121.L20 S55174-A183 2 m
STP121.L50 S55174-A187 5 m
STP321 S55174-A180
AC 230 V 210 s
1 m
STP321.L20 S55174-A184 2 m
STP321.L50 S55174-A188 5 m
1)
NC = Normally Closed = (valve) powerless closed
NO = Normally Open = (valve) powerless opened
2)
Halogen-free per VDE 0207-24