Ok Herez a lot of confusion to me just please see the link below , and when you scroll at the bottom of the page there is a marking Common-2 Floating RS485 common
should I connect all these togeteher running a cable .
And thats all what itis to be in case of all the galvanic isolated transceivers .
http://www.linear.com/prod/data...asheet=495

If I do not use galvanic isolation and use independent supply ,see actually my application loops inside a Factory premize and connect all non isolated Commons together is that all what to be done . I dont have PE physical Earth in one of the Ready made slave which is inside a plastic casing and battery powered the o/p connection is [ 0V , T+ , T- , VCC ] ' NO SHIELD CONNECTION HERE ' .


Appretiate if answered stepwise to avoid confusion.

Kindly/