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Adjustable auxiliary switch
(type-specific)
Note
Mechanical design
Basic components
Housing
Gear train
Actuator factory setting
Manual adjustment
Self-centering shaft
adapter
Mechanical limitation of
the rotational angle
Mounting bracket
Electrical connection
Type-specific
elements
Auxiliary switches
Potentiometer for
position indication
Siemens Building Technologies
Landis & Staefa Division
The illustration below shows the adjustable switching values for auxiliary switches A and
B in relation to the rotational angle.
Mounting position for
shaft adapter/position
+2,5°
indicator
Actuator scale:
Clockwise
-2,5° 0°
Setting increments: 5°
Switching hysteresis: 2°
Adjustment span for
0°
switches A and B
Actuator scale:
92,5° 90°
Counter clockwise
Setting position for
shaft adapter/position
indicator
The setting shafts for the auxiliary switches turn together with the actuator. The scales
are valid only for the zero position of the actuator (clockwise movement).
Robust, lightweight all metal housing made from aluminum diecast which guarantees a
long actuator life even under extreme ambient conditions.
Maintenance-free and noise-free gear train with stall and overload protection for the life
of the actuator.
The actuator has a factory setting of + 2.5 mm which ensures a tight close-off for the air
dampers.
You can manually adjust the actuator by pushing the button "PUSH".
The actuator can be fastened to shafts with various diameters and in various shapes
(square, round) using just one screw due to the L&G patented mounting.
Insert the shaft adapter from either side into the opening for the shaft adapter depending
on the damper shaft length. For short shafts, the shaft adapter is on the duct side.
The shaft adapter coupling and the shaft holding are coupled via double-sided gearing.
The limitation of the rotational angle can be adjusted in the span of 0...90° in increments
of 5°.
A metal strip with bolt serves to fasten the actuator on the opposite side of the shaft
holding.
All actuators come with pre-wired 0.9 m long connection cables.
For supplementary functions, the auxiliary switches A and B can be adjusted on the
actuator front, below the opening for the shaft adapter.
A potentiometer has been integrated as positioner for the electrical position indication of
the damper position.
10°
20°
30°
A
10°
20°
30°
60°
80°
70°
70°
80°
90° 92,5°
B
A
Aux Switch
70°
80°
90°
Adjustment 20
B
-2,5°
20°
10°
0°
+2,5°
CM2N4626E / 02.1999
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70
90
30
80
40
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50
60
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