Multifunctional Input, Digital Input - Siemens RDG200KN Basic Documentation

Functions
4

Multifunctional input, digital input

4.10 Multifunctional input, digital input
# Input function
0 Not used
1 External/return air
temperature
2 Heating/cooling
changeover
Heating/
cooling
changeover
3 Window contact
Window
contact
4 Dewpoint monitor
5 Enable electric heater
Enable
electric
heater
6 Fault
Fault
information
92 | 150
The thermostat has 3 multifunctional inputs X1, X2 and U1. Input U1 will be
configured as digital input in a future product version.
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.
The current temperature or state of the inputs X1/X2 and U1 is available on the bus
for monitoring purposes.
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 [➙ 42].
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 [➙ 42].
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 [➙ 23].
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
[➙ 56].
Digital input to signal an external fault (e.g.: 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 [➙ 99].
(Alarm x, with x = 1 for X1, x = 2 for X2, x = 3 for
U1).
Note: Fault displays have no impact on
thermostat operation. They merely represent a
visual signal.
Type
X1/X2/U1
--
AI
AI/DI
DI
DI
DI
DI
A6V11545892_en--_a