RS485 isolated circuit - forgot connections. Will this work?
Are the GND1 pins (2,8) &amp; GND2 (9,15) are internally shorted? (I didn't find this info in datasheet) If yes, does my circuit work?


Likely.  Use a multimeter to verify.  Best practice is to connect all gnd pins to their respective ground.


I cannot see any data on Serial terminal (connected D+,D- to USB-RS485 converter


Check the level on your RE pin.  Looks like you signal controls both receive (RE) and transmit (DE).