Rockwell Automation 1784-PCC ControlNet Communication Card Installation Instructions - Manual (Page 40)

3-20 Install and Use the 1784-PCC Card in Windows 2000/XP
Publication 1784-IN034D-EN-P - June 2002
4. Click on the + next to Allen-Bradley PCMCIA to display the available
Allen-Bradley cards.
IMPORTANT
If you insert two PCC cards, only one of the cards that you
insert is available for use. The Device Manager windows looks
like this:
The card that displays this icon
!
is unavailable for
use. We do not recommend that you have more than one
1784-PCC card installed in your system.