ABB AC31 - Current input 0 … 20 mA; 4 … 20 mA; Pt100;Pt1000 input; Unused input channels; Connection of other temperature-dependent resistors

Data Value
Resolution 12 bit + sign (measuring range ± 10 V)
11 bit + sign (measuring range ± 5 V)
Total error Replacement device: ± 1 % of full range value
Existing device: ± 0.5 % of full range value
Common mode input voltage range (e.g. X2 /
2.1, reference e.g. X2 / 1.0 (AGND1))
-10 V ... +10 V
For further information, please refer to the existing documentation
System description Advant Controller 31.
Current input 0 … 20 mA / 4 … 20 mA
Total error:
Replacement device: ±1 % of full range value ± tolerance of current-sensing resistor
Existing device: ±0.5 % of full range value + tolerance of current-sensing resistor
Pt100/Pt1000 input
Data Value
Measurement method Replacement device: 3-wire configuration
Existing device: 4-wire configuration. It is no
longer possible to connect sensors in series.
Evaluation errors in measuring range -50…
+400 °C
Replacement device: ± 1 % of full range value
Existing device: ± 0.5 % of full range value at
Pt100, ± 1 % of full range value at Pt1000
Current source for Pt100/Pt1000 resistors The replacement device has a constant cur-
rent source that is alternately connected to up
to 8 analog channels (depending on configu-
ration).
Unused input channels
See existing documentation 07AI91.
Connection of other temperature-dependent resistors
Other temperature-dependent resistors cannot be used in the replacement device.
Input with thermocouples
Thermocouples cannot be used in the replacement device. The existing documentation is no
longer valid.
AC31 Adapters
Replacement devices: I/O modules > Replacement device 07AI91-AD
2018/09/24 3ADR010122, 8, en_US 105