User Manual

Functions
Multifunctional input, digital input
4
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# Function of input Description
Type
X1/X2/U1
4 Dewpoint monitor
Digital input for a dewpoint sensor to detect
condensation. Cooling is stopped if condensation
occurs.
DI
Enable
electric
heater
5 Enable electric heater
Digital input to enable/disable the electric heater
via remote control.
Enable electric heater is also possible via bus. In
this case, do not assign the function to any local
input X1, X2, U1. See also Control sequences
[➙ 54].
DI
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 Fault and alarms
function on KNX [➙ 95].
(Alarm x, with x = 1 for X1, x = 2 for X2, x = 3 for
U1).
Note: Fault displays have no impact on the
thermostat's operation. They merely represent a
visual signal.
DI
U1, X1, X2
(Digital)
7 Monitor input (digital)
Digital input to monitor the state of an external
switch via bus
DI
U1, X1, X2
(Digital)
8
Monitor input
(temperature)
Sensor input to monitor the state of an external
sensor (for example, NTC 3k) via bus.
AI
U1, X1, X2
(Temp.)
9
Supply air temperature
limitation
Sensor input to acquire the supply air
temperature.
The thermostat controls the room temperature via
the built-in sensor. The control output
(DC 0...10 V) is reduced if the supply air
temperature falls below the min. limit or exceeds
the max. limit (P063 , P064)
AI