Principles of analog value processing
4.6 Wiring and connecting thermocouples
S7-300 Module data
256 Manual, 06/2017, A5E00105505-AJ
Connection of the reference junction
If all thermocouples connected to the module's inputs share a common reference junction,
compensate the circuit as follows:
Figure 4-16 Connection of thermocouples to reference junction
Additional information
You can find additional information on the compensating box and connection to an analog
module on the Internet. (
https://support.industry.siemens.com/cs/ww/en/view/18272332
)
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