Rockwell Automation T7903 ICS Regent+Plus I/O Termination Assembly (ITA) - Manual (Page 32)

I/O Termination Assembly
3 2
Industrial Control Services
A set of five screw terminals on the Varelco variant of the ITA provides
the facility to connect the negative supply, AGND, AREF and to ground
the spare Varelco pins.. The detailed connections are listed in Table
D-3.
Table D-3. Varelco J10 Connection Details.
Connector
Ident Pin Ident Comments
J10 A Connect to
AREF1/AREF2.
J10 B Connect AGND.
J10 C Connect to Field Power
Supply Return.
J10 D No Connection.
J10 GND No Connection.