Adjusting The Limit Switch - Samson 3730-5 Mounting And Operating Instructions

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 amplifier (see
section 5.2.1) must be connected to the
output circuit.
Adjustment screw (2)
Fig. 25: Adjusting the limit switch
EB 8384-5 EN
When the tag (1) is located in the inductive
field of the switch, the switch assumes a high
resistance. When it moves outside the field,
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)
Adjusting the limit switch
Proximity switch (3)
79