Technical data

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Siemens RDG100KN Basic documentation CE1P3191en
Building Technologies Functions 22 Jun 2010
# Function of
input
Description Type
X1/X2
Type
DI
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, x = 3 for D1).
Note: Fault displays have no impact on the thermostat's
operation. They merely represent a visual signal.
DI DI
KNX
R
D1, X1, X2
(Digital)
7 Monitor input
(Digital)
Digital input to monitor the state of an external switch via
bus.
DI 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.
AI --
 Operational action can be changed between normally open (NO) and normally
closed (NC) via parameter P39, P41 (or P43 if it is a digital input)
 Each input X1, X2 or D1 must be configured with a different function (1…5).
Exception: 1, 2 or 3 inputs can be configured as fault (6) or monitor input (7,8)
 X1 is factory-set to “External sensor” (1), X2 to “Not used” (0), and D1 to
“Operating mode switchover” (3)
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.
Tempera
ture out
of range
KNX
R