Basic Documentation

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Siem ens GMA..1 actuators with spring return CM2Z4614en
Building Technologies 2018-01-11
100
0
Χ
U (16 V)
Y [V]
Y
S
[%]
4637D02
2 1810
Umin Umax
50
Uo
Max. positioning range Ysmax = 100 % (95°)
Span Ys = 50 % (47.5°)
Offset Uo = 2 V
Span ΧU = 16 V
Effective span
ΧUw = Umax – Umin
= 10 V - 2 V = 8 V
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
E
+E
Rotary direction
Hysteresis
H = 70 mV
Neutral zone NZ = 200 mV
Hysteresis
H = 70 mV
Counter- clockwise
Clockwise
90°
⇓
0°
0°
⇓
90°
4614D03en
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 ΧU.
Hysteresis H = 0.7 % of span ΧU.
Characteristic function for
the above example
Actuators
GMA161.1, 166.1
(DC 0...10 V)
Actuators
GMA163.1, 164.1
(DC 0...35 V)