Siemens OpenAir GEB Series Technical Instructions page 9

OpenAir GEB Non-Spring Return, 24 Vac, 132 lb-in, Rotary Electronic Damper Actuators
Control signal
adjustment
GEB164.1U
(Offset and Span)
Siemens Industry, Inc.
4. Determine the angle of rotation for the damper blade shaft. Subtract that amount
from 90°.
5. Remove the shaft adapter and insert it with the position indicator pointing to the mark
on the scale calculated in the previous step. See Figure 12.
6. Attach the clip.
7. Rotate the damper blade shaft to its "0" position.
8. Return the actuator to the damper shaft and tighten the shaft adapter to the damper
shaft.
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:
2. Uo = 5V, ∆U = 30V: The maximum working range for
3. Uo = 0V, ∆U = 30V: Factory setting
Figure 13. The Minimum and Maximum Control Signal Adjustment.
Example:
Open the actuator from 0 to 50% (45°) using a control signal of:
Calculating the valve of ∆U:
100 [ %] (U max
∆ =
U
Working angle of rotation
The minimum working range for
Ys = 100%
Ys = 100%
Umin= 2V to Umax= 10V.
− −
U min) 100 x (10
=
in % 50
Technical Instructions
Document Number 155-318P25
Factory setting:
2)
=
16 V
May 19, 2014
30V span
0 offset
Page 9