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

Adjusting the limit switch

9 Adjusting the limit switch
The positioner version with inductive limit
switch has one adjustable tag (1) mounted
on the shaft which operates the proximity
switch (3).
For operation of the inductive limit switch,
the corresponding switching amplifier (see
section 5.2.1) must be connected to the out-
put.
If the tag (1) is inside the field of the switch,
the switch assumes a high resistance. If the
tag is outside of the field, the switch assumes
a low resistance.
Normally, the limit switch is adjusted such
that it will provide a signal in both end posi-
tions of the valve. The switch, however, can
also be adjusted to indicate intermediate
valve positions.
Fig. 21 · Adjustment of the limit switch
70
EB 8384-3 EN
The desired switching function, i.e. whether
the output relay shall be picked up or re-
leased when the tag has entered the field,
has to be determined, if necessary, at the
switching amplifier.
Note!
The inductive limit switch replaces the soft-
ware limit switch A1 with terminal assign-
ment +41/–42.
Each switching position can optionally be
set to indicate when the tag has entered the
field, or when it has left the field.
The second software limit switch remains ef-
fective, the function of the software limit
switch A1 is disabled.
Adjustment screw (2) Tag (1) Proximity switch (3)