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Rotation Limitation for MA4X-715X and MA4X-707X Series
The AM-689 rotation limiter is used in conjunction with the tab on the universal clamp or the
AM-686 position indicator which comes with the AM-689. In order to function properly, the
clamp or indicator must be mounted correctly.
The AM-689 rotation limiter controls the rotational output of the MA4X-715X, MA4X-715X-
502, MA4X-707X, and MA4X-707X-502 actuators. It is used in applications where a damper
has a designed rotation that is less than 90°, for example with a 45° or 60° rotating damper.
1. Determine the amount of damper rotation required.
2. Locate the AM-689 rotation limiter on the actuator so that its edge lines up with the
degree graduation on the actuator face which corresponds with the required rotation.
See Figure-6.
3. Find the appropriate cross-hair location through the slot of the rotation limiter. This is
the mounting location for the retaining screw.
4. Pierce through the label material to allow easy fastening of the retaining screw.
5. Position the rotation limiter back to the desired position, making sure the locating “teeth”
on the rotation limiter are engaged into the locating holes on the actuator.
6. Fasten the rotation limiter to the actuator using the self-tapping screw provided.
7. Test the damper rotation by applying power. Re-adjust if necessary.
0
.2
R
.4
.6
.8
1
0
.2
R
.4
.6
.8
1
0
.2
L
.4
.6
.8
1
Figure-5 Adjusting Stop Block for Limited Rotation.
30
40
50
60
70
80
90
Screw secured at
these cross hairs.
30
40
50
60
70
80
90
Angle of rotation
is now set at 40.
30
40
50
60
70
80
90
Figure-6 Securing the AM-689 Rotation Limiter.