Installation Instructions
Document No. 129-367 
Installation Instructions  
May 13, 2021 
Page 4 of 7  Siemens Industry, Inc. 
Figure 12. Self-adapt Switch in the On Position. 
Factory setting 0 (OFF) 
CAUTION: 
When turning the self-adaptive feature on, or 
after software reset with the feature on, the 
actuator will enter a five-minute calibration cycle 
as the actuator adjusts to the rotation limits of 
the system. The software reset happens after 
power on, or may be caused by electrostatic 
discharge (ESD) at levels of 2 kV and above. 
Slope (span) and Offset adjustment 
For GDE/GLB163x and GDE/GLB164x only 
Factory setting: 
Slope (span) U 10 
Offset Uo = 0 
Use a flat-blade screwdriver to 
make adjustments. The long arm of 
the † points to the setting. 
Figure 13. 
Wiring 
All wiring must conform to NEC and local codes and 
regulations. 
Use earth ground isolating step-down Class 2 
transformers. Do not use autotransformers. 
Determine the supply transformer rating by summing 
total VA of all actuators used. It is recommended that 
one transformer power no more than 10 actuators. 
WARNING: 
Installations requiring   Conformance 
•  All wiring for CE rated actuators must only 
be separated extra low voltage (SELV) or 
protective extra low voltage (PELV) per 
HD384-4-41. 
•  Use safety-isolating transformers (Class 
III transformer) per EN 61558. They must 
be rated for 100% duty cycle. 
•  Overcurrent protection for supply lines is 
maximum 10A. 
Wiring Diagrams 
GDE/GLB13x 
Counterclockwise Damper Rotation of GDE/GLB13x 
If the damper blades turn counterclockwise to open (CCW), 
reverse the 6 (violet) and 7 (orange) wires at the controller. 
CAUTION:  
Do not wire different types of actuators (such as 
GBB or GIB actuators) in parallel with these 
models. 
NOTE:  (For GDE/GLB floating control actuator series 
only) To prolong actuator life, use a controller 
and/or software that provide a time-out 
function. This function removes the actuator 
drive signal after the signal has been on for a 
predefined time. 







