Analog modules
6.11 Analog input module SM 331, AI 6 x TC isolated (6ES7331-7PE10-0AB0)
S7-300 Module data
Manual, 06/2017, A5E00105505-AJ
413
Terminal assignment
The figures below show various connection possibilities. These examples apply to all
channels (channels 0 to 5).
Wiring: Thermocouple with internal compensation
With this kind of compensation, the module detects the temperature at the reference junction
of the connector.
Thermocouple with compensating line (extension) to front connector
Analog digital converter (ADC)
External cold spot comparison (ADC and current source)
Figure 6-32 Internal compensation
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