20
EP100 Master Instruction
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D00002-C-04
11 OPTION
11.1 Limit switch
Rebuild to this option resp. exchange
Remove three screws
1
including tooth lock washer
from plastic cover.
Attach limit indicator
2
so that the flattened shaft end
19
contacts the groove of the limit indicator shaft in
the positioner.
Attach limit indicator by means of three screws
3
and
washers. The feedback shaft at back of positioner
should easily be turnable, thereby also moving the
vanes of the limit indicator. If this is not the case,
loosen screws
3
and flush- align the shafts of
positioner and limit switch (turn coupling shaft several
times).
Replace short travel indicator
12
by long travel
indicator.
Screw high cover
20
(or standard cover with insert
frame) on housing.
Switch functions
Feedback lever, feedback shaft and the control vanes
are all connected to each other, without an
intermediate transmission. The control vanes are
therefore moving simultaneously with the same angle
rate as the feedback lever. The length of the control
vane corresponds with the swing angle of 120°.
Both control vanes are located on different planes.
Each control vane can be seen independently from
the other, because each has its own sensor.
By adjusting the screws (after loosening the center
screw
10
), the control vanes can be adjusted
relatively to the angle rate, so that e.g. one vane dives
into and another dives out of the sensor (see
illustration).
Setting limit switch trigger points
Loosen center screw
10
(1-2 turns; do not remove!),
otherwise the control vanes will be damaged during
the following steps.
Set trigger point switch GW1:
Turn screw at number 1 until desired switch behavior
is reached.
Set trigger point switch GW2:
Turn screw at number 2 until desired switch behavior
is reached.
To fix switch points retighten center screw
10
.
Do not touch control vanes during operation, danger
of injuries!
Levels of control vanes (illustration without cover)
