Can I use my RM16AI as I/O for Pro Tools 12.x without Universal Control active (and mixer)?

Can I use my RM16AI as I/O for Pro Tools 12.x without Universal Control active (and it's mixer)?

Further, is it possible w/o the etheet LAN interface, i.e.,using only 2 11394b 800 coections? Will using both 1394b ports offer more performance than using 1?

I've tried this w/o etheet (UC) but can not get audible playback via the Presonus Central Control unit. It records and I can see signal levels on PT outputs, but no sound.

In other words, can the RM16AI be used as a FW800 ADA unit less UC and its mixer?