For both channels of the 4 AI TC module, you can select "1", "2" or "internal" as the reference
junction number. If you select "1" or "2", the same reference junction (RTD channel) is always
used for all four channels.
In the following figure, the 4 AI RTD electronic module is assigned parameters for the Pt100
climate measuring range. The insulated thermocouples are compensated externally by a
resistance thermometer connected to the 4 AI RTD (channel 0).
$,57'
$,7&
0
0
0
0
,
&
,
&
M+
Measuring cable (positive)
M-
Measuring cable (negative)
I
C
+
Constantcurrent cable (positive)
I
C
-
Constant-current cable (negative)
Figure 13-6
Compensation by 4 AI RTD
Analog electronic modules
13.9 Fundamentals of analog value processing
ET 200iSP
Operating Instructions, 11/2017, A5E00247483-07
303
Содержание SIMATIC ET 200iSP
Страница 82: ...Configuration options 3 18 Redundancy with IM 152 ET 200iSP 82 Operating Instructions 11 2017 A5E00247483 07 ...
Страница 184: ...Commissioning and Diagnostics 6 8 Diagnostics with STEP 7 ET 200iSP 184 Operating Instructions 11 2017 A5E00247483 07 ...
Страница 194: ...Maintenance 7 7 Reading service data ET 200iSP 194 Operating Instructions 11 2017 A5E00247483 07 ...
Страница 220: ...Terminal modules 9 6 Terminal module TM RM RM ET 200iSP 220 Operating Instructions 11 2017 A5E00247483 07 ...
Страница 372: ...Glossary ET 200iSP 372 Operating Instructions 11 2017 A5E00247483 07 ...
Страница 384: ...Index ET 200iSP 384 Operating Instructions 11 2017 A5E00247483 07 ...