John Kasunich wrote: >Jon Elson wrote: > > >>John Kasunich wrote: >> >> >>>The Pico systems boards (USC and UPC) have opto-22 modules on most of >>>their I/O, which isn't good for encoder signals. >>> >>> >>In fact, they do work. You should be able to go to at least 100,000 >>counts a second through the optocoupler - so it is definitely not the >>limiting factor. >> >> > >I thought opto-22 input modules came in 120V AC and 24V DC flavors? >Encoder outputs are neither. If there is a 5V input module then I stand >corrected. > > Those are the outputs, not the inputs. The inputs are just IC-based optoisolators, and should work at many KHz.
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