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Siemens Building Technologies Basic Documentation RVL471 CE1P2524E
HVAC Products 27 Communication 23.10.2002
27.2.2 Heat demand signal
Using the DC 0...10 V heat demand signal (terminals Ux–M), the RVL471 can transmit
the heat demand to other devices.
The heat demand corresponds to the heat requisition in °C and - in terms of value - is
identical with the heat requisition that reaches the primary controller via the data bus
(LPB).
The temperature value of the heat demand corresponding to 10 V can be set via oper-
ating line 181.
Voltage signals:
Voltage Temperature when oper-
ating line 181 = 80 °C
Temperature when oper-
ating line 181 = 130 °C
DC 0 V 0 °C0 °C
DC 5 V 40 °C 65 °C
DC 10 V 80 °C 130 °C
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