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Siemens
Switching and monitoring device RMS705B
CE1P3124en
Building Technologies
Appendix
01.04.2010
Signal converter
Min-Max-Average
(Section 9.1)
Configuration
Functions
Input
Inputs split (Split)
Min-Max-Average
output
A…B
Modulating
output
A…B
2 function blocks.
5 inputs for min. max selection and average calculation.
2 continuous signals DC 0…10 V.
Enthalpy calculator
(Section 9.2)
Configuration
Functions
Temperature
input
A…B,
Relative humidity input A…B
Enthalpy
A…B
Absolute
humidity
A…B
Dew point temperature
Wet bulb temperature
Enthalpy
difference
Calculation of the following variables from temperature and relative
humidity:
Enthalpy, absolute humidity, dew point temperature, Wet bulb
temperature, Enthalpy difference.
Pressure correction for plant location (Elevation above sea level).
Signal doubler-inverter
(Section 9.3)
Configuration
Functions
a
Y a
Y a
S p lit-In v
A
B
Input
Modulating
output
A…B
For 2 continuous signals DC 0…10 V.
"Positioning signal min“ and adjustable "Positioning signal max".
Scaling of input signal (value low, value high).
Settable
inversion.
Heat demand, refrigeration demand, H/C changeover
Heat demand
(Section 10.1)
Configuration
Functions
Contrl.
Controller 1
Controller 2
Controller 3
Primary controller
Relay output
Modulating output
Acquire heat demand from bus (acquire valid heat demand in the set
zone).
Pass on heat demand as digital output e.g. to control a central pump.
Pass on heat demand as continuous output °C.
Pass on demand signals to other distribution zone on KNX bus.
Refrigeration demand
(Section 10.2)
Configuration
Functions
Contrl.
Controller 1
Controller 2
Controller 3
Primary controller
Relay output
Modulating output
Acquire refrigeration demand from bus (acquire valid refrigeration
demand in the set zone).
Pass on refrigeration demand as digital output e.g. to control a central
pump.
Pass on refrigeration demand as continuous output °C.
Pass on demand signals to other distribution zone on KNX bus.
Heating/cooling ch'over
(Section 10.4)
Configuration
Functions
23
2-pipe
heating/cooling
system (
)
H/C changeover input (
)
Changeover
with
operating
mode selector ( )
Changeover by date (
23
)
Changeover of operating mode heating or cooling in 2-pipe systems.
Preselection of heating/cooling on device generated or received as
signal via bus.
Changeover by analog or digital input.
Changeover with operating mode selector
Changeover
by
date.