ABB AC31 Assembly And Operation Manual page 98

AC31 Adapters
Replacement devices: I/O modules > Replacement device 07AI91-AD
Fig. 64: Only one channel of a "configuration pair" is used
1) Electrically isolated power supply of analog sensor
2) Earthing at sensor
3) Channel not used
± 10 V, ± 5 V at differential inputs
Measuring ranges ± 10 V / ± 5 V / ± 500 mV and ± 50 mV no longer exist.
Measuring ●
ranges
● Measuring ranges 4 ... 20 mA / 0 ... 20 mA not changed to existing documentation.
Pt 100 / Pt 1000 To measure the temperature by means of resistors, a constant current is supplied by the
replacement device. This imprint no longer occurs at terminals 16, 17, 35 and 36. Therefore the
wiring must be changed for the temperature measurement.
Further information:
● Fig. 58
● Fig. 61
● Figures 5.2-4 and 5.2-5 from the existing documentation of the 07AI91 are not valid for the
replacement device System description Advant Controller 31.
● Terminals 7, 10, 13, 26, 29 and 32 can no longer be used as connection bases. The termi-
nals are only used for the 3-wire temperature measurement
System description Advant Controller 31.
98
If only one channel of a "configuration pair" is used (e.g. channel 0 and 1), then
the other channel must be short-circuited during a voltage measurement. Short-
circuited in this context means that for instance the connections 1.2, 2.3 and 2.2
are connected. Otherwise the channel not used reports that the range has been
exceeded.
Wire-breakage
In case of a wire-breakage, the numerical value +32767 is output. This is fol-
lowed by an error message via the CS31 bus.
3ADR010122, 8, en_US 2018/09/24