well to be honest I think it suggests it will work either way round. don't forget the communication is a two way thing. it will just be a circuit that trips or blows something within it should there be a surge from either side.
its not powered in any way. just a passive protection.
I wouldn't worry if the instructions are so vague... at the worst scenario it wont communicate the wrong way around... I doubt it.
given I cant find any other people quizzing the situation online your only other option is to contact the manufacturer. just email them and ask only then can you be 100% sure
good stuff Edited by Bobby Bobblerz - 10/28/14 at 2:03am