Siemens 181 Workshop Manual page 15

Parameters/address space
4.1 Measurement types and measuring ranges
Special features when using Cu10 sensors
● Choose "Thermal resistor (3-wire connection)" and "Cu10" in the parameter assignment.
● Wire the Cu10 sensor into the 3-wire connection technology.
● During operation, automatic, internal compensation of the line resistance of the missing
measuring line takes place.
Note
To ensure optimum line compensation with Cu10, please observe the following:
• An accurate measured value is only attained if the cable resistance of the positive
• Recommendation: Keep the measuring line as short as possible.
• Different resistance values may also occur due to the connection method used.
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constant current line to the Cu10 sensor and the cable resistance of the negative
measuring line are identical in value.
Analog input module AI 4xRTD/TC 2-/3-/4-wire HF (6ES7134-6JD00-0CA1)
Manual, 02/2014, A5E03573289-AD