Samsomatic 3776 series, Монтаж и эксплуатация

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EB 8368 EN
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Adjusting the switching points for electric microswitches
Fig. 20 · Device without enclosure cover and indicating cap
Electric microswitches
For devices with electric microswitches, the
shaft
is equipped with up to three adjustable
cam disks . Each cam disk actuates an
electric microswitch by the roller attached to
the switch lever (see Fig. 20).
The electric microswitches have a change-over
contact which can be used as normally open
contact or normally closed contact.
Shaft
Cam disc
Electric microswitch
Switch lever
Adjusting screw
Adjusting the switching points
1
Unscrew enclosure cover from the device.
2
Pull off indicating cap from the cam holder
(only for rotary actuators).
3
Move control valve to the desired switching
position.
4
Turn adjusting screw with a screwdriver
until the cam disk actuates the electric
microswitch and the output signal
changes.
5
To compensate for the switching point shift
due to temperature changes, turn adjusting
screw
by x turnings (see adjustment data
table on page 28) in the opposite direction.
6
Move control valve out of the switching pos-
ition and check whether the output signal
changes.
7
Move control valve to the switching position
again and check the switching point.
8
Attach and turn indicating cap onto the cam
holder until it engages (only for rotary actu-
ators).
9
Attach enclosure cover to the device.