Basic Documentation

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Siemens Universal controllers RMU710B, RMU720B, RMU730B CE1P3150en
Building Technologies Heat demand 03.10.2011
25.5 Heat demand modulating ( )
In addition to the heat demand relay, the heat demand can be provided at a
modulating output of other devices. You can set the characteristic of the modulating
0…10 V signal.
Main menu > Commissioning > Extra configuration > Aggregates > Heat demand >
Operating line Adjustable values / remarks
Heat demand modulating ---, N.Y1, N.Y2, ... Activate output
Main menu > Commissioning > Settings > .... or
Main menu > Settings > Aggregates > Heat demand >
Operating line Range Factory setting
Setpoint at 0 V –50 °C…setpoint at 10 V 0 °C
Setpoint at 10 V Setpoint at 0 V…250 °C 100 °C
Limit value Setpoint at 0 V…setpoint at 10 V 10 °C
"Setpoint at 0 V" determines the flow temperature setpoint at DC 0 V.
"Setpoint at 10 V" determines the flow temperature setpoint at DC 10 V.
Limit value denotes a limit value for heat demand: Temperatures below this level
are interpreted as "no heat demand".
As long as the flow temperature setpoint does not exceed the set limit value, output
signal DC 0 V is sent. When the limit value is exceeded, the relevant output signal
is sent until the setpoint is again below the limit value minus a hysteresis of 0.5 K.
Output signal Y (DC 0…10 V) for the heat demand corresponds to a flow
temperature setpoint range of 0…120 °C. This limit value should be at 10 °C.
100
0
10
Y
[ V ]
[°C]
20 40 60 80 1200

20
21 3
w
TV
Key:
1. Setpoint in °C at DC 0 V
2. Setpoint in °C at DC 10 V
3. Limit value
w
TV
: Current flow temperature setpoint
Purpose
Configuration
Setting values
Explanations relating to
the setting values
Diagram relating to the
setting values
(application example)