Siemens OpenAir GDE Series Technical Instructions page 7

Electric damper actuators, non-spring return rotary 24 vac - modulating control 0 to 10 vdc

OpenAir Non-Spring Return Rotary Electric Damper Actuator
24 Vac – Modulating Control
Operation,
continued
Control signal
Auxiliary switches
Siemens Building Technologies, Inc.
Determine the setting needed to electronically limit the angle of rotation between 0 to 50%
(0 to 45°) using a 2 to 10 Vdc input.
Calculating the value of ΔU:
100
[%]
Δ
=
U
working
angle
of
rotation
Ys
[%]
Settings: Uo = 2 Vdc;
ΔU = 16 Vdc
Electronic limitation
angle of rotation
Ys= 50% (45°)
ΔU = 16V
Slope
Active voltage range ΔUw = 2 to 10 Vdc
GDE/GLB164.1P and GDE/GLB166.1P
Figure 13 shows the adjustable switching values for the auxiliary switches A and B.
Actuator Scale:
clockwise
Switches A and B
Setting interval: 5°
Switching hysteresis: 2°
Actuator Scale:
counterclockwise
NOTE:
The auxiliary switch setting shafts rotate with the actuator. The scale is valid only
when the actuator is in the "0" position on clockwise motion.
Use the long arm of the X to point to the position of switch A. Use the narrower tab on the
red ring to point to the position of switch B.
×
(
10
[
Vdc
]
Uo
[
Vdc
])
Y
-2,5
0
10
20
30
A
0
10
20
30
60
92,5 90
80
70
Figure 13. Adjustable Switching Values for
the Dual Auxiliary Switches.
Technical Instructions
Document Number: 155-187P25
100
%
=
×
(
10
Vdc
2
Vdc
50
%
[%]
S
100
50
0
2
10
ΔUw (8 V)
ΔU (16 V)
U
o
Figure 12. Example.
70
80
90 92,5
B
70
80
90
-2,5
20
10
0
November 30, 2005
=
)
16
Vdc
Y [V]
18
A
B
10
20
80 70 60
50
AUX SWITCH