Dirk,
The OF2200 doesn't have a plug-it because it draws too much current - more current than the plug-it cable is rated to. Putting the plug-it pigtail on would bring up the same issue.
Having said that, I think someone has done it (I seem to remember reading a post about it) and since the OF2200 would only draw such high current if you really, really pushed it, it probably wouldn't be a problem. But don't expect Festool to say it's OK to put in on, because they won't.