An excellent question, and something that Lee@VistaCNC asked this morning. The short answer is yes, within the stock OMRON part. But I need to validate that the diode is good. I missed that point.
However, I think there may be more at play here. One of the steps I tried a bit ago was to remove the COR relay (socketed, so very easy to do). If you look at the schematic clipping I sent, that would effectively render the START switch useless (I don't have a System ON indicator installed... part of the front console which is only a concept at present). Yet, pressing the START switch absolutely is correlated with bricking the pendant. I can't explain that bricking because back EMF would not be an issue. There is no inductive load (COR coil) being switched on in that case.
But, that does get us to a different point, also something I have been thinking about and that VistaCNC is suggesting)... An isolated 24VDC power supply. I'm presently using my computer power supply to provide voltages. A normal ATX power supply does not have 24VDC. I am using a buck boosting supply for that. I looked at the output with a scope and it looked good, but this whole problem kind of reeks of noise, so I'm going to dump the buck and spend a buck (OK, poor pun) to buy a separate 24VDC supply.
PS: I validated the wiring, although the terminal IDs in the clip I attached to an earlier post are incorrect. I had added an additional block that messed up the IDs... since corrected but not worth putting a new attachment for that.
ON EDIT:
Sorry, Andy, I missed your question about whether the behavior is EStop is the same regarless of where it is pressed (pendant or F1). I get the same behavior on both the mechanical switches, which is logical as they both are in the same circuit and subject to the same noise, etc. F1 on the screen behaves in an entirely different fashion and in the way I would expect and desire.
