Basic Documentation

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Siemens Rotary actuators with spring return GCA…1 CE1Z4613en
Building Technologies Spring return actuators 2017-05-26
2.5 Mechanical design
The electromotoric GCA...1 electronic actuators are available for two-position, three-
position, modulating and networked control with spring return. The nominal torque is 18
Nm. The actuator's connecting cables are prewired.
Robust, light-weight full metal housing made of die-cast aluminum. The housing
guarantees a long actuator life even under harsh environmental conditions.
Maintenance-free and noise-free gear train with stall and overload protection for the life
of the actuator.
The spring preload of 5° ensures safe closure of the air dampers following correct
mounting.
You can manually adjust the actuator using a hex wrench and lock it using a
screwdriver.
This mounting type allows for securing the actuator to shafts with various diameters
and in various shapes (square, round) using just one screw.
Insert the shaft adapter from either side into the opening for the shaft adapter.
For short shafts, the shaft adapter is on the air duct side.
The shaft adapter coupling and the adapter holding are coupled by means of double-
sided gearing.
A bolted perforated metal strip is used for attaching the actuator.
All actuators have prewired, 0.9 m long (standard length) connecting cables.
The actuators can be delivered as a type-specific variant having the following elements:
For auxiliary functions, the auxiliary switches A and B can be adjusted on either side.
Both potentiometers for the operating functions Uo and ΧU are accessible on either
side.
The potentiometer is integrated and can be connected by means of a cable.
The HMI of networked types consists of a push button and an LED to allow certain
interactions with the actuator or to provide visible feedback from the actuator.
Brief description
Housing
Gear train
Spring preload
Manual adjustment
Self-centering shaft
adapter
Mounting bracket
Electrical connection
Type-specific elements
Auxiliary switches
Potentiometer for offset
and span
Feedback potentiometer
for position indication
Push button and LED
at external Interface