Function Block Enthalpy; Connections And Functions; Assign Inputs; Assign Outputs - Siemens Synco 200 SEZ220 Documentation On Basics

Connections
Functions
Activate function block
Valid identifiers
Value ranges
28 / 46
Siemens
Building Technologies
7

Function block ENTHALPY

7.1

Connections and functions

The following illustration shows the function block connections as shown on the
configuration sheet:
x x x x
TEMP 1 RELHU 1 TEMP 2 RELHU 2
MODE 2: ENTHALPY
Y Y Y Y Y Y
See below on how to assign connections (inputs and outputs).
The function block calculates the following from its input signals TEMP 1 / RELHU
1 and TEMP 2 / RELHU 2:
• Enthalpy based on temperature and relative humidity.
• Absolute humidity based on temperature and relative humidity.
• Enthalpy differential based on 2 temperatures and 2 relative humidity values.
• Dewpoint temperature based on temperature TEMP 1 and relative humidity
RELHU 1.
The results of the calculations are provided as DC 0...10 V signals.
7.2

Assign inputs

The function block is activated through the following assignments:
• At least 2 inputs, and
• At least 1 of the 2 outputs.
• Any analog input Xx with valid identifier can be assigned to the ENTHALPY
function block. Valid identifiers are TEMP, %, 0.0, and 0000.
7.3

Assign outputs

7.3.1 Activation and value ranges
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:
Display Name
ENTH 1 Enthalpy 1
ABSHU 1 Absolute humidity 1
ENTH 2 Enthalpy 2
ABSHU 2 Absolute humidity 2
ENTH D Enthalpy difference
DEWPNT Dew point
SEZ220 signal converter
Function block ENTHALPY
Unit Y MIN
kJ/kg 0
g/kg 0
kJ/kg 0
g/kg 0
−50
KJ/kg
° C 0
CE1P5146en
Y MAX
100
20
100
20
+50
50
02.06.2008