Doc,
Any TIU and remote are capable of operating PS3 engines provided that their software is new enough.
If you're using DCS 2.x, you must upgrade or risk being unable to operate all of the features of your PS3 engine. In fact, there have been reports of PS3 engines not operating on DCS 2..x at all.
If you're using DCS 4.x but lower than 4.10, you should upgrade because those releases were buggy.
Anything 4.10 or higher should be OK.