Multifunctional Input, Digital Input - Siemens DF301 Basic Documentation

#
0
1
2
Heating/
cooling
changeover
3
Window
state
(RDF600..)
3
Window
state
(RDF301..)
4
Siemens.........................RDF301, RDF301.50..., RDF600KN, RDF600KN/VB, RDF600KN/S
Smart Infrastructure
3.9

Multifunctional input, digital input

The thermostat has 2 multifunctional inputs X1 and X2.
An NTC type sensor like the QAH11.1 (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 parameters P38 + P39 for X1 and P40 + P41 for X2.
The current temperature or state of the inputs X1/X2 is available on bus for
monitoring purposes.
The parameters can be set to the following values:
Function of Description
input
Not used No function.
External / return Sensor input for external room temperature sensor or
air temperature return air temperature sensor to acquire the current
room temperature, or floor heating temperature
sensor to limit the heating output.
Note: The room temperature is acquired by the built-in
sensor if the floor temperature limitation function is
enabled via parameter P51.
Heating / Sensor input for "Automatic heating / cooling
cooling changeover" function.
changeover A switch can also be connected rather than a sensor
Important: Switch closed means always cooling, (this
cannot be changed), see section 3.5.
Heating / cooling changeover is also possible via bus.
In this case, the function must not be assigned to any
local input X1, X2. See also section 3.5.
Diagnostic value 00 is displayed for closed contact /
100 for open contact, if a switch is connected.
Window contact Window contact input to switch the operating mode to
(RDF600KN...) Protection.
1)
If the window contact is open, user operations are
ineffective and "OFF" is displayed.
Window contact is also possible via bus. In this case,
the function must not be assigned to any local input
X1, X2. See also section
Operating mode Digital input to switch over the operating mode to
switchover Economy.
(RDF301..) If the operating mode switchover contact is active,
user operations are ineffective and "OFF" is
displayed.
Operating mode switchover is also possible via bus.
In this case, the function must not be assigned to any
local input X1, X2. See also section
Dew point Digital input for a dew point sensor to detect
monitor condensation. Cooling is stopped if condensation
occurs.
3.2.1.
3.2.1.
Basic Documentation
Type
X1/X2
--
AI
AI /
DI
DI
DI
DI
51 / 92
CE1P3171en
2020-02-21