Rockwell Automation T7420A_AF ICS Regent+Plus Analog Input Modules 60Hz Rejection and Fast Response - Manual (Page 21)

Analog Input Modules (T7420A, AF)
P D - 7 0 2 3 M a r - 0 6
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Figure 12. Analog Input Module Calibration Potentiometer
Locations.
The I/O extender module has jumper posts that allow you to
connect or disconnect the I/O slot field wiring on the I/O
chassis to the printed circuit board plugged into the I/O
extender. During the calibration steps you will remove any
jumpers installed on these posts in order to connect the DC
voltage signal source to the analog inputs. For modules
configured for 16-channel, single-ended inputs, Figure 13
shows the jumper posts to which you should connect the signal
source for each analog input channel. For modules configured
for 8-channel, differential inputs, Figure 14 shows the jumper
posts to which you should connect the signal source for each
analog input channel.