Neutral Zone - Siemens OpenAir GMA 1 Series Technical Basics
Actuators with spring return
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Also See for OpenAir GMA 1 Series:
- Mounting instructions (12 pages) ,
- Mounting instructions (11 pages) ,
- Mounting instructions (12 pages)
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Characteristic function for
the above example
Actuators
GMA161.1, 166.1
(DC 0...10 V)
Actuators
GMA163.1, 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. 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
GMA..1 actuators with spring return
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
CM2Z4614en
2018-01-11
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