I think I can guess the designer's intent here. Check out page 3-5 of the
1761-NET-AIC User's Manual for a similar (though yours is simpler) diagram.
You'll use just one 1761-NET-AIC. From that device, your cabling will be as follows:
Channel 1 (6-pin Phoenix RS-485)
1761-CBL-AS03 or -AS09 cable to the Channel 1 plug on SLC-5/03 CPU.
Channel 2 (8-pin Mini-DIN RS-232)
1761-CBL-PM02 to RS-232 port on "SCADA computer".
Channel 3 (9-pin DB-9 RS-232)
Straight-through RS-232 cable to DH-485(RS-232) port on PanelView 1000
+24 VDC power to the power screws.
This will give you the minimum of wiring hassle, even though you need to buy two A-B cables.
The PanelView must be one of the units with DH-485 protocol implemented on RS-232 type electrical connections. The part number must end in "9", such as 2711-K10C9 for the color 10" keypad terminal.
This will give you a small 3-node DH-485 network. Traditionally the SLC-5/03 is Node 1, the PanelView is Node 2, and the computer is Node 3.
This leaves the Channel 0 port of the SLC-5/03 open for a different communications protocol, most likely DF1 over a modem of some kind. "SCADA PAK" sounds like Intellution to me, but if it's not your scope of supply just leave the Channel 0 port empty and at default settings.