User Manual

9.2.1 Enable enthalpy calculator
Assign an input to enable this function.
Both temperature and relative humidity must be available and at least one output
must be interconnected to enable calculation.
Main menu > Commissioning > Extra configuration > Signal converter > Enthalpy
calculator >
Config
uration
Operating lin
e Adjustable values / Comment
Temperature input A ---, N.X1, N.X2, ...
Relative humidity input A ---, N.X1, N.X2, ...
Temperature input B ---, N.X1, N.X2, ...
Relative humidity input B ---, N.X1, N.X2, ...
Enthalpy A ---, N.Y1, N.Y2, … /
Enable modulating output.
Absolute humidity A ---, N.Y1, N.Y2, … /
Enable modulating output.
Dew point ---, N.Y1, N.Y2, … /
Enable modulating output.
Wet bulb temperature ---, N.Y1, N.Y2, … /
Enable modulating output.
Enthalpy B ---, N.Y1, N.Y2, … /
Enable modulating output.
Absolute humidity B ---, N.Y1, N.Y2, … /
Enable modulating output.
Enthalpy difference ---, N.Y1, N.Y2, … /
Enable modulating output.
The value ranges of the output signals are limited and cannot be changed. The DC
0...10 V output signal corresponds to the following value ranges:
V
alue ranges
Identifier Unit V
alue range output signal Output signal
Y Min Y Max
Enthalpy A, B
kJ/kg 0.0 100.0 DC 0…10 V
Absolute humidity A, B
g/kg 0.0 20.0 DC 0…10 V
Dew point
°C 0.0 +50.0 DC 0…10 V
Wet bulb temperature
°C -50.0 +50.0 DC 0…10 V
Enthalpy difference
kJ/kg -50.0 +50.0 DC 0…10 V
9.2.2 Plant location
The enthalpy calculator includes a correction for pressure, dependent on the plant
location ("Elevation above sea level").
Main menu > Commissioning > Settings > Signal converter > Enthalpy calculator.... or
Setting values
Main menu > Settings > Signal converter > Enthalpy calculator >
Operating line Range Factory setting
Elevation above sea level 0…5000 500 m
132 / 216
Siemens Switching and monitoring device RMS705B CE1P3124en
Building Technologies Signal converter 01.04.2010