Emerson Bettis RTS FQ Series Operating Manual page 28

Fail-safe quarter-turn electric actuator
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Section 6: Commissioning
February 2019
Figure 29
Parts Overview:
1.
2.
3.
4.
5.
To adjust the end stop, first undo the locknuts. To lengthen the stroke by means of the end
stop, unscrew the end stop out of the cover flange.
NOTE:
Upon delivery, the end stop is set to the maximum possible stroke. Further unscrewing
causes no further extension of stroke; the end stop becomes ineffective.
Check:
NOTE:
If the stroke is to be shortened by means of the end stop, the actuator must not be in the
fail-safe position. Before adjusting, it is necessary to move the actuator electrically at least
10% away from the end position.
After undoing the locknut, screw the end stop into the cover flange, and check the
adjustment of the end stop by triggering a fail-safe stroke.
In electrical operation, it is not permissible for the mechanical end stop to be run into.
After adjusting the mechanical end stop, check the setting of the travel end position and
correct it if necessary. After completing the adjustment work, fix the locknuts back in place.
23
Mechanical End Stop (3)
Lock Nut
End Stop (hex SW70mm)
Hydraulic Damper
Damper Adjusting Screw
Cover
In fail-safe operation, let the actuator run against the stop.
Despite the locknut being undone, it must not be possible to screw the end stop
further into the cover flange.
User Instructions
MAN-02-04-60-0351-EN Rev. 3
Commissioning

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