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4.10 Multifunctional input, digital input
#
Input function
0
Not used
External/return air
1
temperature
2
Heating/cooling
changeover
Heating/
cooling
changeover
3
Window contact
Window
contact
4
Dewpoint monitor
5
Enable electric heater
Enable
electric
heater
A6V11545892_en--_e
●
Also be disabled (P350 = 0)
●
Run only in heating (P350 = 2) sequence
●
Run only in cooling (P350 = 3) sequence
For this application, only DC fan control is available at output Y50.
The thermostat has 3 multifunctional inputs X1, X2 and U1.
An NTC type sensor like NTC 3k, a LG-Ni1000 (AI, analog input) or a switch (DI,
digital input) can be connected to the input terminals. The functionality of the inputs
can be configured via P150 + P151 for X1, P153 + P154 for X2, and P155 + P156
for U1 (RDG2..KN)/X3 (RDG2..T).
The current temperature or state of the inputs X1/X2 and U1 is available on the bus
for monitoring purposes. (RDG2..KN)
The parameters can be set to the following values:
Description
No function
Sensor input for external room temperature sensor
or return air temperature sensor to acquire the
current room temperature.
Sensor input for "Automatic heating/cooling
changeover" function.
A switch can also be connected rather than a sensor.
Important: Switching state configured via P151,
P154, P156. See also Additional functions [➙ 48].
Heating/cooling changeover is possible via bus. In
this case, the function must not be assigned to local
inputs X1, X2, U1. See also Additional functions
[➙ 48].
Diagnostic value 0 ˚C is displayed for closed contact,
100 ˚C for open contact, if a switch is connected.
Digital input to change over the operating mode to
Protection.
If the window contact is active, user operations are
ineffective and OFF is displayed.
Window contact is also possible via bus. In this case,
do not assign the function to local inputs X1, X2 or
U1. See also Operating modes [➙ 29].
Digital input for dewpoint sensor to detect
condensation. Cooling is stopped in the event of
condensation.
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 local inputs X1,
X2, U1. See also Control sequences [➙ 77].
Functions
Multifunctional input, digital input
4
Type
X1/X2/U1/
X3
--
AI
AI/DI
DI
DI
DI
115 | 186
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