Some of the Automated Solutions software use the PKTX but not RSLinx in communicating with AB processors. They have their own device drivers that does the job of RSLinx.
Wonderware has a driver (IOServer) but I still need the latest .bin files. I need the card to get on the DH+ to talk to my HMI which is Wonderware. This system was already in place or I wouldn't even consider using AB.
Note: You will have to register with Rockwell to get username and password.
Once on the software update page you can select RSLinx and then RSLinx Lite. The other versions of RSLinx require you to have purchased it and be in support.