If you had the available physical disk expansions for PS2 (RoZ, CoP, ToAU, WotG), then yes, you'll have all your expansion content available on the PS2 even if you purchase the Abyssea Collection for PC. Abyssea is DLC on the PS2 and the codes will transfer across characters in between platforms.
However, if you're missing any of the disk based expansions for PS2, you will not be able to access the Abyssea DLC content on your PS2 as it requires all four disk expansions. You will only be able to play those on your PC edition.
____________________________FFXI: Catwho on Bismarck. Once again a top bard on the server: Dardaubla 90 on 1/6/2014
FFXIV: Katarh Mest on Lamia - Member of The Swarm and the League of Extraordinary Crafters
I can't understand anyone who skips the cutscenes of a Final Fantasy game. That's like going to Texas and not getting barbecue.