Rockwell Automation T7903 ICS Regent+Plus I/O Termination Assembly (ITA) - Manual (Page 47)

I/O Termination Assembly
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A set of four screw terminals on the Screw Terminal variant of the ITA
provides the facility for the reference voltage to be passed to the
T7420 Analog Input Module. A circuit schematic is shown below and
the detailed connections are listed in Table F-4.
Table F-4. Screw Terminal J10 Connection Details.
Connector
Ident Pin Ident Comments
J10 A Connect to AREF1 & 2.
J10 B Connect to AGND.
J10 C Connect to Field Supply
Return.
J10 D No Connection.