OpenAir GEB Series Enhanced Rotary Non-Spring Return Damper Actuators Technical Instructions
Document Number A6V12029156
December 16, 2021
Siemens Industry, Inc. Page 9
Control signal
adjustment
GEB164.1U
(Offset and Span)
The offset (start point) and span of the control signal can be adjusted. The offset, Uo, can
be adjusted between 0 to 5 Vdc. The span, U, can be adjusted between 2 to 30 Vdc.
Ys Mechanical positioning range (100% = angle of rotation 90°)
Yu Control signal
Uo Offset (start point)
U Span
NOTE: When the mechanical limitation of the angle of rotation and
self-adaptive function are ON, 100% does not equal 90°.
1. Uo = 0V, U = 2V: The minimum working range for
Ys = 100%
2. Uo = 5V, U = 30V: The maximum working range for
Ys = 100%
3. Uo = 0V, U = 30V: Factory setting
Factory setting:
30V span
0 offset
Figure 13. The Minimum and Maximum Control Signal Adjustment.
Example:
Open the actuator from 0 to 50% (45°) using a control signal of:
Umin= 2V to Umax= 10V.
Calculating the valve of U:
V16
50
2)(10 x 100
% in rotation of angle Working
min) Umax (U %] [ 100
U =
−
=
−
=
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