Basic Documentation

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Siemens Rotary actuators with spring return GCA…1 CE1Z4613en
Building Technologies Technical design 2017-05-26
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 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) and if the direction of rotation is set to "clockwise".
-E
E
+E
Direction of rotation
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 direction of rotation,
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 for the
above example
Actuators
GCA161.1, GCA166.1
(DC 0...10 V)
Actuators
GCA163.1, GCA164.1
(DC 0...35 V)