It's just a PCI Ethernet card on a 90 degree riser in a steel case. Totally normal setup, just like the onboard ethernet module.
The product profile illustrates using the remote access features of the PV+ on this module, which suggests that the RSLinx Enterprise and KepServer Enterprise drivers cannot easily use it.
Is your application needing to connect to logic controllers on multiple networks, or are you adding an enterprise network connection to run FactoryTalk ViewPoint or VNC ?