Siemens OpenAir GCA Series Technical Instructions page 15

OpenAir™ GCA Series Spring Return 160 lb-in Electronic Damper Actuator
Wiring
Implementation
of DIP Switch
Features
(GCA15x Only)
Self-Adapt Feature
Siemens Industry, Inc.
All wiring must conform to NEC and local codes and regulations.
Use earth ground isolating step-down Class 2 transformers. Do not use
autotransformers.
The maximum rating for a Class 2 step-down transformer is 100 VA. Determine
the supply transformer rating by summing the VA ratings of all actuators and
other components used. It is recommended that one transformer does not
power more than nine actuators (or 80% of its VA).
WARNING:
Mixed switch operation is not permitted to the switching outputs of
both auxiliary switches (A and B).
Either AC line voltage from the same phase must be applied to all
six outputs of the dual auxiliary switches, or UL-Class 2 voltage
must be applied to all six outputs.
NOTE: With plenum cables, only UL-Class 2 voltage is
permitted.
Counterclockwise
Self-adapt feature
2 to 10 Vdc
Tandem Mount
Master
Figure 21. GCA15x Series.
The factory setting is 0 (OFF).
When mechanical angle of rotation is limited, the self-adapt switch may be turned
ON so that the limited range will become the new 0 to 100% for the actuator
logic. In this case, 0 to 100% is not equal to 90°
CAUTION:
When turning the self-adaptive feature on or after a software reset
with the feature on, the actuator will enter a three-minute calibration
cycle as the actuator adjusts to the rotation limits of the system. A
software reset happens after power on or may be caused by
electrostatic discharge (ESD) at levels of 2kV and above.
The position output signal U is not influenced by the self-adapt function. The 0 to
10V feedback signal U is always proportional to 0° to 90° (or 90° to 0°).
Technical Instructions
Document No. 155-173P25
Clockwise
Self-Adapt Off
0 to 10 Vdc
Single Mount
Slave
May 19, 2014
Page 15