Siemens SIMATIC ET 200SP HA Manual page 25

Application areas of thermocouples
The following figure shows several thermocouples and their temperature ranges.
Figure 4-2
Special features for 2-wire connection
For 2-wire connection, the complete line resistance as well as the transfer resistances in the
wiring are included in the measurement as a matter of principle. You can compensate this
error via the "Line resistance" parameter. The following procedure is recommended to
determine the actual line resistance: In the resistance measurement type (2-wire connection),
short-circuit the connections at the sensor end and configure the resistance value determined
by the module as the line resistance.
Analog input module AI 16xTC/8xRTD 2-/3-/4-wire HA (6DL1134-6JH00-0PH1)
Manual, 05/2017, A5E39408175-AA
Thermocouples and their ranges
4.4 Measurement types and measuring ranges
Parameters
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