EB 8365 EN
23
Operation
Note:
The switching elements and the le-
vers required to activate them react
to temperature fluctuations. To ensure
reliable switching, the switching hys-
teresis between the mechanical stop
(e.g. plug in the seat) and the switch
-
ing point of the limit switch must be
larger than the displacement of the
switching point caused by the tem-
perature change.
Distance between switching points for
100 mm lever:
Contact SC3,5-N0-YE ≥ 2 mm,
Contact SJ3,5-SN
≥ 0.75 mm.
With other lever lengths, adjust the switching
point to the changed lever length.
For example, if the lever length changes from
100 to 160 mm, the distance between the
switching points is increased from 2.0 to
3.2 mm correspondingly.
Simplified adjustment of the inductive limit
switches:
Valve CLOSED:
Close the valve until the plug sits in the seat.
Valve OPEN:
Move the valve to the desired travel position,
e.g. final position.
−
Turn the adjustment screw (3.1) to slowly
move the metal tag (4.1) towards the
contact until the switching point is
reached.
−
Turn the adjustment screw in the opposite
direction to achieve that the switching
point reaches the stop after
−
contact SC3,5-N0-YE ≥
1
/
6
turn
contact SJ3,5-SN
≥
1
/
16
to
1
/
10
turn
If the adjustment is performed carefully, the
distances between the switching points speci-
fied above apply.
5.1.2
Type 4746-x3 and
Type 4746-04
Î
For adjustment, the cam disk (4.2) has to
be positioned in such a way that its cam
moves towards the roller (6.1, Fig. 1) in
accordance with the direction of travel.
1. Move the valve to the desired switching
position (e.g. final travel position "valve
OPEN" or "valve CLOSED").
2. Adjust the switch which is assigned to the
upper or lower switching point.
3. Turn the adjustment screw (3.1) until the
cam of the cam disk (4.2) reaches the
roller (6.1, Fig. 1) and the switch chang-
es over.
4. To accurately check the switching point,
move the valve slightly back and then
move it to the switching position again.
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