Rockwell Automation T7903 ICS Regent+Plus I/O Termination Assembly (ITA) - Manual (Page 55)

I/O Termination Assembly
P D - 7 9 0 1 M a r c h , 0 6
55
A p p e n d i x H - Single Ended, No Current
Limiting, Field Loop With Dioded Power
Protection
YTMR790117 (Right Hand Varelco Connector)
YTMR790217 (Left Hand Varelco Connector)
YTMR790317 (Screw Terminal Connector)
The Single Ended, No Current Limiting, Field Loop With Dioded Power
Protection ITA provides a method for supplying a common feed/return
path to field devices on a per module basis, as shown below:
The single ended signal is fed from the I/O chassis to the ITA. The ITA
provides a common supply which is tracked out on the ITA to provide
each single ended signal with a feed/return supply path. The overall
maximum current of the ITA should not exceed 2.5A in any redundant
power configuration where diodes are used or 16A total where power
is supplied to field loops via J10 Pin A (diodes not used).
Single ended I/O modules have 16 field circuits and one ITA will be
required for each module.
The connector idents are shown on the legend on the ITA.
The block diagrams below show typical connection of the module to
the field device.