80 EB 8384-4 EN
Adjusting the limit switch
9 Adjusting the limit switch
The positioner version with an inductive limit
switch has an adjustable tag (1) mounted on
the axis of rotation, which operates the prox-
imity switch (3).
For operation of the inductive limit switch,
the corresponding switching amplier (see
section5.2.1) must be connected to the out-
put circuit.
When the tag (1) is located in the inductive
eld of the switch, the switch assumes a high
resistance. When it moves outside the eld,
the switch assumes a low resistance.
Normally, the limit switch is adjusted in such
a way that it will provide a signal in both
end positions of the valve. The switch, how-
ever, can also be adjusted to indicate inter-
mediate valve positions.
Metal tag (1) Proximity switch (3)Adjustment screw (2)
Fig.25: Adjusting the limit switch
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