Analog electronic modules
4.18 2AI RTD High Feature analog electronic module (6ES7134-4NB01-0AB0)
ET 200S
4-90 Manual, Edition 10/2005, A5E00514527-01
Compensation of thermocouples with a Pt100 on the 2AI RTD Standard
Factors affecting the accuracy of the temperature measurement
Ensure there is good thermal contact between the reference
junction and the Pt100 used for compensation.
Wiring rules
We recommend that you wire the Pt100 with a four-wire
connection.
The accuracy of the thermal resistor (Pt100) used for
compensation must be taken into account.
1
Additional technical specifications
on the error limits of the 2AI TC
The error of the measurement input (2AI RTD Standard) used for
compensation must be taken into account.
1
1
In the case of thermocouples with a characteristic curve with a very shallow gradient, these errors
can lead to a major measurement discrepancy.
For the following thermocouples, this causes a limitation of the input range of the thermocouples in
which the accuracy information in the manual applies:
• Type N: -100 °C
• Type K: -230 °C
• Type E: -230 °C
See also
2AI U Standard analog electronic module (6ES7134-4FB01-0AB0) (Page 4-37)
4.18 4.18 2AI RTD High Feature analog electronic module
(6ES7134-4NB01-0AB0)
Properties
• 2 inputs for thermocouple or voltage measurement
• Input ranges:
– Voltage measurement: ± 80 mV, resolution 15 bits + sign
– Thermocouples: Types E, N, J, K, L, S, R, B, T, C, resolution 15 bits + sign
• Isolated from the load voltage L+
• Linearization of the sensor characteristic curves
• Permitted common-mode voltage 140 VDC/100 VAC
• Internal reference junction in connection with TM-E15S24-AT or TM-E15C24-AT
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