Rockwell Automation 1771-IR , D17716.5.76 RTD INPUT MODULE - Manual (Page 65)

Differences between Series A
and Series B
Appendix F
FĆ3
If the module is programmed for RTS = 0 and the PLC is switched from
run to program and back to run, an RTS timeout is inhibited on the change
from program to run.
In ohms mode, bias is able to produce a negative result.
The excitation current on Series B flows out of termination A. The excitation
current on the series A flowed into termination A. Systems wired
according to the IR User’s Manual will work without modification,
presuming the transducer is polarity insensitive.
Allowable ambient temperature change to maintain accuracy is 1 o C/min.