Thermocouples
5.3 Compensation for the reference junction temperature
Analog value processing
Function Manual, 06/2014, A5E03461439-AC
99
Connection of the compensating box
The compensating box is looped into the supply lines of an individual thermocouple. The
compensating box must be supplied isolated. The power supply unit must have a sufficient
noise filter, e.g., by means of a grounded shielding winding.
Each channel can use its own thermocouple type supported by the analog module
regardless of the other channels. A separate compensating box is required for each channel.
Connection example "None" or external compensation
Connect the compensating box with the connection module of the analog input module using
copper cables.
①
Copper cables
②
Compensating box (per channel), for example; thermocouple type B does not require a
compensating box
③
Thermocouple
Figure 5-16 Connection example "No" compensation as reference junction
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