Thermocouples
5.3 Compensation for the reference junction temperature
Analog value processing
Function Manual, 06/2014, A5E03461439-AC
93
The figure below shows the connection options for thermocouples provided the temperature
of the reference junction (outside the module) is kept at a fixed reference temperature
(20 °C).
①
Thermocouple with compensating line and supply line
②
Compensating line (same material as thermocouple)
③
Reference junction
④
Copper supply cable, for example
Figure 5-11 Example 2: Connecting a thermocouple to an analog module for compensation with
"fixed reference temperature"
Содержание SIMATIC ET 200AL
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