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14 Proximity switches
▶ Only use M8x1 proximity switches which can be mounted
flush.
Two proximity switches can be mounted on the GEMÜ 650TL
for feedback of the closed position from the pneumatic pis-
ton 1 and handwheel 2.
a
Fig. 5: Connection of pneumatic piston proximity switch
a
2
Fig. 6: Connection of handwheel proximity switch (representa-
tion turned by 180°)
▶ The upper proximity switch is for the CLOSED position of
the handwheel, and the lower proximity switch is for the
CLOSED position of the pneumatic piston.
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NOTICE
1
a
1
a
2
NOTICE
14.1 Setting proximity switches
▶ The proximity switches are adjusted after complete as-
sembly of the valve.
▶ The same procedure applies for the pneumatic piston
proximity switch 1 and handwheel proximity switch 2.
1.
Remove threaded plug a from the actuator using a flat-
head screwdriver.
2.
Move the actuator to the closed position.
3.
Set (see "Setting the damping piece", page 32) damping
piece b.
NOTICE!
At least two-thirds of damping piece b must be vis-
ible.
4.
Carefully screw in proximity switch c by hand until it con-
tacts damping piece b.
e
c
b
1
5.
Turn back proximity switch c by a 1/2 to 3/4 turn.
6.
Secure this position by fixing it with nut d.
d
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14 Proximity switches
NOTICE
NOTICE
a
b
b
b
c
2
d
GEMÜ 650TL
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