Hi, I have RS485 communication circuit as shown in figure. But it has no isolation, only SM712 is used for ESD protection. Now, i think it will be better to isolate the it.So, how can i isolate it? so, should i replace the RS485 (SN65HVD20D) by a internally isolated RS 485 or have to use some isolators in the circuit to isolate it?
If I use a bi-directional digital isolator (say ISO1540), can it possible to isolate the bus side A and B? Can I exactlty want to know what would be the problem if I do so? Please go through the block diagram below: