Samson 4765 - Operating the Positioner; Positioner-Actuator Assignment

EB 8359-1 EN 17
Operating the positioner
6 Operating the positioner
6.1 Assignment of the posi-
tioner and actuator
Arrangement of the actuator, the mounting
position of the positioner, the reference vari-
able and the operating direction:
Î See Fig.5 to Fig.8
When any subsequent changes are made,
e.g. reversing the operating direction of the
positioner control loop or changing the actu-
ator fail-safe action from “actuator stem ex-
tends” to “actuator stem retracts” or vice ver-
sa, the positioner's mounting position must
be changed accordingly.
Actuator stem extends (FA)
1
20
p
st
w
1
20
p
st
w
Lever (1) located at top of plate (20) Lever (1) located at bottom of plate (20)
Fig.5: Operating direction << Left attachment Fig.6: Operating direction <> Right
attachment
Actuator stem retracts (FE)
p
st
w
p
st
w
Fig.7: Operating direction << Right
attachment
Fig.8: Operating direction <> Left attachment