Hello,
I had a customer ask :
What is the difference between 2 models below?
SCT3250EX-21.78"-EX112 (P/N 98-0003-3489-0-ND) W
SCT3250EX-21.78"-EX111 (P/N 98-0003-3490-8-ND) RW
In regards to the difference between the two touchscreens, the -0 suffix calls out a serial interface and the -8 suffix calls out a USB-R interface.
You can find the information on the series drawing.
https://multimedia.3m.com/mws/media/604660O/marketing-drawing-37321-mkt.pdf