Operation Manual

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Siemens RDF301, RDF301.50, RDF600KN Basic documentation CE1P3171en
Building Technologies Functions 2012-10-04
# Function of
input
Description Type
X1/X2
KNX
R
Fault
information
6 Fault Digital input to signal an external fault (example: dirty air
filter).
If the input is active, “ALx” is displayed and a fault is
sent on the bus. See also section 3.11.8.
(Alarm x, with x = 1 for X1,
x = 2 for X2).
Note: Fault displays have no impact on the thermostat's
operation. They merely represent a visual signal.
DI
KNX
R
X1, X2
(Digital)
7 Monitor input
(Digital)
Digital input to monitor the state of an external switch via
bus, e.g. to send a local alarm via KNX to the central
controller.
DI
KNX
R
X1, X2
(Temp.)
8 Monitor input
(Temperature)
Sensor input to monitor the state of an external sensor
(e.g. QAH11.1) via bus, e.g. to send a local temperature
(0...49°C) via KNX to the central controller.
AI
 Operational action can be changed between normally open (NO) and normally
closed (NC) via parameter P39, P41
 Each input X1 or X2 must be configured with a different function (1…5).
Exception: 1 or 2 inputs can be configured as fault (6) or monitor input (7,8)
 X1 is factory-set to “Operating mode switchover” (3), X2 to “External sensor”
(1)
For more detailed information, refer to section 3.4 “Applications”.
3.10 Handling faults
When the room temperature is outside the measuring range, i.e. above 49 °C or
below 0 °C, the limiting temperatures blink, e.g. “0 °C” or “49 °C”.
In addition, the heating output is activated if the current setpoint is not set to “OFF”,
the thermostat is in heating mode and the temperature is below 0 °C.
For all other cases, no output is activated.
The thermostat resumes Comfort mode after the temperature returns to within the
measuring range.
For fault status messages on the bus, see section 3.11.8.
In the event of a power fail
ure, all working conditions (operating mode, setpoint, fan
stage, all control parameter settings) are stored without time limitation.
When power returns, the thermostat reloads this data and continues to work in the
same conditions as before.
Temperature out
of range
KNX
R
Power failure