ABB AC31 Assembly And Operation Manual page 90

AC31 Adapters
Replacement devices: I/O modules > Replacement device 07AI91-AD
1.5.3.2.1 LED display
The LED display on the replacement device is changed:
Fig. 57: Front view: 07AI91-AD
No.
1
2
3
4
90
In contrast to the existing device, the following measuring ranges are not avail-
able in the replacement device:
with thermocouples is also not possible.
The replacement device does not perform a self-calibration.
Display of module
8 yellow LEDs to indicate the signal status of the analog inputs (X2 and X3)
8 yellow LEDs to indicate the signal status of the analog inputs (X5 and X6)
2 red LEDs to indicate errors (of AI523 module)
1 green LED to indicated the status of the supply voltage of the AI523 module (is
supplied via X4)
The replacement device does not provide a test button to measure functionality.
3ADR010122, 8, en_US
± 500 mV, ± 50 mV. Temperature measurement
2018/09/24