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Section 2: Functional Description of the RTS FQ Fail-Safe Quarter-Turn Actuator
User Instructions
MAN-02-04-60-0351-EN Rev. 3
February 2019
Functional Description of the RTS FQ Fail-Safe Quarter-Turn Actuator
Parts Overview:
1.
PM Motor
2.
Worm Gear Stage
3.
Planetary Gear Train
4.
Ball Screw
5.
Operating Current Brake
6.
Rack and Pinion Gear
7.
Spring Assembly
8.
End Stop
9.
Fitting Shaft
This compact fail-safe actuator can be built as a version for “fail-safe open” (counter
clockwise direction of rotation when looking at the fitting shaft) or “fail-safe close”
(clockwise direction of rotation). It is even possible to subsequently change the fail-safe
direction (separate manual available). Some assembly work is required. Having this
conversion performed at our factory is recommended, however.
Figure 3
Fail-Safe Open Version
Fail-safe
Direction
Fail-safe
Direction
Direction
Figure 4
Fail-Safe Close Version
Fail-safe
Direction
