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Neutral Zone - Siemens OpenAir GEB 1 Series Technical Basics

Actuators without spring return
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Characteristic function for
the example
Actuators
GEB16...1 (DC 0...10 V)
Note
Actuators
GEB163.1, 164.1
(DC 0...35 V)
Siemens
Building Technologies
Y
[%]
S
100
50
0
2
10
Χ U (16 V)
U
o
U
U
min
max
3.5

Neutral zone

For modulating control actuators, note the control characteristic for the selected switch-
on point of the setpoint. The diagram shows the setting characteristics by including the
neutral zone for range DC 0...10 V.
The diagram shows the setting characteristics by including the neutral zone. The values
for the neutral zone listed in the diagram apply to DC 0...10 V (without characteristic
function).
-E
Hysteresis
H = 70 mV
Neutral zone NZ = 200 mV
The diagram shows the relationship between the differential voltage E = Y – U
(difference between setpoint Y and actual value U) and the rotary direction, including
hysteresis and neutral zone.
For DC 0...35 V (with characteristic function) the following values apply:
Neutral zone
NZ = 2 % of span
Hysteresis
H = 0.7 % of span
Technische Grundlagen: Drehantriebe GEB...1
Max. positioning range Ysmax = 100 % (95°)
Span Ys =
Offset Uo =
Span ΧU =
Y [V]
18
Effective span
ΧUw
= Umax – Umin
= 10 V - 2 V = 8 V
Rotary direction
Hysteresis
H = 70 mV
Χ
U.
Χ
U.
50 % (47.5°)
2 V
16 V
E
+E
15/44
CM2Z4621en
2017-05-26

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