(Solved) ESTOP loop/scheme - external safety relay

1.5 years later, but this thread was very helpful. I'm Converting a 1996 Howa VMC to LinuxCNC from the old Mitsu Meldas control. The machine has a Guardmaster Minotaur safety relay as opposed to your custom circuit, but the operation and conditions to satisfy a clear estop are similar. I can set it up exactly as it was configured at the factory using Meldas, and no latching anything in code. Thanks

Very glad it helped.  I'm duplicating it for my current secret project.