Rockwell Automation T7903 ICS Regent+Plus I/O Termination Assembly (ITA) - Manual (Page 46)

I/O Termination Assembly
4 6
Industrial Control Services
A set of five screw terminals on the Varelco variant of the ITA provides
the facility to ground the spare Varelco pins and for the reference
analog voltage to be connected to the I/O module. The detailed
connections are listed in Table F-3.
Table F-3. Varelco J10 Connection Details.
Connector
Ident Pin Ident Comments
J10 A Connect to module
AREF1 & AREF2.
J10 B Connect to AGND (T7420
only).
J10 C Link to Field Supply
Return.
J10 D No Connection.
J10 GND No Connection.