ABB AC31 Assembly And Operation Manual page 105

Data
Resolution
Total error
Common mode input voltage range (e.g. X2 /
2.1, reference e.g. X2 / 1.0 (AGND1))
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
Measurement method
Evaluation errors in measuring range -50...
+400 °C
Current source for Pt100/Pt1000 resistors
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 The existing documentation is no
longer valid.
2018/09/24
For further information, please refer to the existing documentation
System description Advant Controller 31.
3ADR010122, 8, en_US
Replacement devices: I/O modules > Replacement device 07AI91-AD
Value
12 bit + sign (measuring range ± 10 V)
11 bit + sign (measuring range ± 5 V)
Replacement device: ± 1 % of full range value
Existing device: ± 0.5 % of full range value
-10 V ... +10 V
Value
Replacement device: 3-wire configuration
Existing device: 4-wire configuration. It is no
longer possible to connect sensors in series.
Replacement device: ± 1 % of full range value
Existing device: ± 0.5 % of full range value at
Pt100, ± 1 % of full range value at Pt1000
The replacement device has a constant cur-
rent source that is alternately connected to up
to 8 analog channels (depending on configu-
ration).
AC31 Adapters
105