ABB AC31 Assembly And Operation Manual page 97

Fig. 63: "Configuration pair" not used
1) Channel 0 and channel 1 are not used -> DIP switch "No evaluation of channels"
1.5.3.2.4 Measuring ranges of the input channels
All input signals are not evaluated as differential signals. Two input channels are used to imple-
ment a differential measurement.
2018/09/24
If both channels of a "configuration pair" are not used, set the DIP switches to
"No evaluation of channels".
The DIP switches are read by the device only once after the supply voltage has
been connected.
3ADR010122, 8, en_US
Replacement devices: I/O modules > Replacement device 07AI91-AD
AC31 Adapters
97