How to tell the 201 and 202 apart physically?

Physical differences between the 201 and 202 models.

201 vs 202 Hardware Differences

201-ESHSAHCV-662-xyzq    202-ESHSAHCV-662-xyzq
201-ESHSAHCV-662-xyzq

 

ISP

201: Eyenix EN772S

202: Eyenix EN781-EN1

 

2-pin Connector

201: Not populated

202: Dedicated RS-485 connector for remote control via VISCA

202-ESHSAHCV-662-xyzq