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Siemens
Central control unit RMB795B
CE1P3122en
Building Technologies
Inputs
18.01.2012
7.5
Outside temperature
7.5.1
Connection choices
For the outside temperature, the following 2 signal sources can be used:
•
Outside air temperature connected locally to the terminal,
activated by the identifier "Outside temperature"
•
Outside temperature via bus.
In addition, it is important whether or not "Outside temperature" communication is
active. Hence, the following 4 variants are made available:
Variant
Diagram
Effect
Outside temperature at the
terminal
Communication outside
temperature
not active
.
T
Central control unit operates with
its own outside temperature.
No impact on the bus.
Outside temperature at the
terminal
Communication outside
temperature
active
.
T
Central control unit operates with
its own outside temperature.
Using the bus, the outside
temperature is also delivered to
other devices.
No outside temperature at
terminal.
Communication outside
temperature
active
.
31
21
Z
09
T
Central control unit operates with
the outside temperature
delivered via the bus by some
other controller
No outside temperature at
terminal.
Communication outside
temperature
not active
.
T
Central control unit has no
outside temperature.
7.5.2
Outside temperature at terminal
Settings and the connection diagram for the outside temperature on the terminal, is
described under Sec. 7.2 "Analog inputs (Xx)".
Main menu > Commissioning > Extra configuration > Input identifier
Op. line
Adjustable values / remarks
…X…
Activate function by assigning the "Outside temperature" value
to the input.
Main menu > Commissioning > Settings > …
or
Main menu > Settings > Inputs > ...X...
Op. line
Range
Factory setting
Type
Ni1000, 2xNi1000, T1, Pt1000, DC
0…10 V
Ni1000
Value low
Depending on selected type.
Depending on type.
Value high
Depending on selected type.
Depending on type.
Correction
−
3.0…
+
3.0 K
0 K
2 possible signal
sources
4 variants
Settings and
connection
Configuration
Setting values
