X20 system modules • Temperature modules • X20ATA492
X20 system User's Manual 3.10
2427
4.31.6.8 Increased precision
4.31.6.8.1 Internal temperature compensation
When using internal terminal temperature compensation, a temperature model must be defined in order to increase
precision. A temperature model should be selected according to the following criteria:
•
Thermal power loss of neighboring modules
•
X20 system - Mounting orientation
4.31.6.8.1.1 Neighboring modules with low thermal power loss
The temperature model listed in the table must be configured according to the mounting orientation.
Horizontal installation
Vertical installation
X2
0
m
od
ul
e
Po
w
er
lo
ss
1
W
≤
X2
0
m
od
ul
e
Po
w
er
lo
ss
1
W
≤
X2
0
m
od
ul
e
Po
w
er
lo
ss
>
1
W
X2
0
m
od
ul
e
Po
w
er
lo
ss
>
1
W
X2
0A
TA
49
2
/ X
20
AT
C
40
2
X20 module
Power loss 1 W
≤
X20 module
Power loss 1 W
≤
X20 module
Power loss >1 W
X20 module
Power loss >1 W
X20ATA492 / X20ATC402
The following temperature model must be set in the "Cfo_SensorTypeCh0x" register.
Bit 6 and 7
Temperature model
Bit 6 and 7
Temperature model
00
Horizontal installation, low thermal radiance <1W
10
Vertical installation, low thermal radiance <1W
Table 843: Temperature model when neighboring modules have low thermal power loss
Note:
The best results are achieved by placing an X20ZF0000 dummy module on both sides.
4.31.6.8.1.2 Neighboring modules with higher thermal power loss
The temperature model listed in the table must be set according to the mounting orientation.
Horizontal installation
Vertical installation
X2
0
m
od
ul
e
Po
w
er
lo
ss
>
1
W
X2
0
m
od
ul
e
Po
w
er
lo
ss
>
1
W
X2
0
m
od
ul
e
Po
w
er
lo
ss
>
1
W
X2
0
m
od
ul
e
Po
w
er
lo
ss
>
1
W
X2
0A
TA
49
2
/ X
20
AT
C
40
2
X20 module
Power loss >1 W
X20 module
Power loss >1 W
X20 module
Power loss >1 W
X20 module
Power loss >1 W
X20ATA492 / X20ATC402
The following temperature model must be set in the register "Cfo_SensorTypeCh0x".
Bits 6 and 7
Temperature model
Bits 6 and 7
Temperature model
01
Horizontal installation, high thermal radiance <1W
11
Vertical installation, high thermal radiance <1W
Table 844: Temperature model when neighboring modules have high thermal power loss
4.31.6.8.2 Remote or external terminal temperature compensation
Setting up a remote or external cold junction can provide the most accurate temperature measurement in a machine
or system.
The installation of a remote or external cold junction is especially helpful in the following cases.
•
There is no module next to the temperature module
•
With strongly fluctuating ambient conditions (draft, temperature)
•
External fan is used in the control cabinet
Summary of Contents for X20 System
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