Sometimes the RS-485 is better than Ethernet, and some application require RS-485 Remote IO.
So, how to use the SNAP-SB1/SB2 as the EPIC-PR1’s remote IO?

Yes, you are right, sometimes serial is the right tool for the job.
At the moment, we don’t have any method to set things up like that.
The only thing I can think of off the top of my head would be to look into the Optomux PAC Control toolkit.

Hi Beno,

I mean they are the SNAP-PAC-SB1 and SNAP-PAC-SB2. Did they support Optomux protocol?

The link I posted suggests this is your best option to achieve what you are asking on SNAP: