2.0 sounds like the iAqualink 2.0 interface and they have a 3.0 now too. Both are cloud based. Unless Elan has some voodoo to connect with it on a local level.

We had a job recently where we had to source a RS-232 Aqualink interface (because client has the newer cloud based one at another house and hates the lag) and found two- one obnoxiously priced on some website, and one onEbay that was used but working. Spent like $400 on that one. Theres just not many out there, and when it eventually blows up youre back at square one.