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Siemens Building Technologies
Basic Dokumentation RVA63.280, RVA53.280
CE1P2374E
Landis & Staefa Division
19.04.2001
2.55.4
Heat demand DC 0...10 V
External consumers can transmit a demand for heat in the form of an analog signal of
DC 0...10 V. The controller converts this voltage signal to a temperature setpoint of
0...130 °C and considers this value when generating the setpoint of boiler temperature
control.
[v]
0
2
4
6
8
10
10
20
30
40
50
60
70
80
90
100 110 120 130 [°c]
23
79Z
2
6
T
=
130°
C
T
=
50°
C
T
=
70°
C
T
=
90°
C
T
=
110°
C
S=
5
°C
T = maximum value of heat demand
S = minimum limitation of heat demand = 5 °C
The setpoint for 10 V can be set with parameter “Maximum value of heat demand”
(operating line 172, setting range 5...130 °C). The voltage corresponding to the
displayed temperature can then be calculated as follows:
C]
[
t"
Maximalwer
derungs
Wärmeanfor
"
C]
[
mperatur"
aktuelleTe
"
*
[V]
10
[V]
°
−
°
=
2.55.5
Changeover of operating mode
Setting 5/6)
Using a modem, for example, the operating mode of heating circuit 1 or 2 can be
switched to stand-by
. When the contact connected to terminal H1 is closed, the
signal lamp or the operating mode button will then flash.
Setting 5:
the operating mode of heating circuit 1 will change when the contact is
closed. D.h.w. heating remains unchanged.
Setting 6:
the operating mode of heating circuit 2 will change when the contact is
closed. D.h.w. heating remains unchanged.
These settings have no impact on other controllers in the system.
Optimally, this function can also be accomplished with the help of terminal H2 and
setting line 174.
Note
