RedHat vs. Netbackup version compatibility question.

I have a question about version compatibility. I can't tell you the NBU version at this time. We are running NBU on RedHat 5.2. Generally speaking will a version of NBU that is running on RHEL 5.2 be fine when we upgrade to RHEL 5.11? I there a NBU version below which it will not run on RHEL5.11?

Thanks, for you response