I think it’s a reed switch with transistor buffer/inverter…
@MarkV3082 do you have an associated magnet, like @ednisley mentions?
I would think this type of scheme should work, assuming it’s electrically equivalent.
When it becomes active, does it pull it’s output high or low?
Do you have a schematic of the circuit you’re using? …
That could explain “if I use the magnetic ones the controller locks up and power cycles”, because reed switches are Even More Different.
The gate [*] needs a pullup resistor, but if the brown wire goes to the controller’s Puxy terminal and that’s just the +5 V supply without an internal resistor, then when the reed closes it crowbars the supply to ground, which would surely reset the controller.
AFAICT, based on what’s known so far, a simple wiring error (of the sort we all make far too often) can explain all the symptoms.
[*] If it’s a MOSFET with the usual GDS layout. If it’s a bipolar transistor, then there would be a base bias resistor in there somewhere.
Sorry I can’t read his mind. 
Why I asked for a schematic…
I had some of the same thoughts with the crowbar idea.
He said it was a rewire from a 6442. Wonder what they were connected to on the old controller. Should work.
If you update the Ruida configuration from the previous Ruida, it should have just plugged and played …
Thank you all I did just plug and in this case failed to play unfortunately. I have no schematic and didn’t rewire anything hence my confusion. I can only assume that the controllers are different internally. Also sorry it does have magnets. Also no part number evident obviously just an in house construction. They are also a real pain to assemble very fiddly. I am going to replace them with mechanical switches and move on with my life. 
I use these on mine, they are hall switches. My X bearing is metal, so it turns on when metal gets near.
Yes I did. Didn’t seem to like it so I downloaded the appropriate firmware for the new board and have got that working without the limit switches obviously.
Make sure the limit switch connector is labeled the exact same on both controllers. Mine are not the same. I can’t just swap connectors and go. I need to move a wire or two to match. Mine is also a 6442 clone so…
Yeah it is exactly the same
If you have mechanical switches, they work also…
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