[Chappyd]

Hi all, I have a KIA VA-50. It's pretty old, and one of the poximity switches on the y axis limit switches went. We were able to order the part, but when I went to replace it, the wire color coding is different. The original has white, red and black wires, and the new switch has blue, black and brown. I can get some idea of what the wires on the machine are by how they are wired, but The new switch has no indication of what is what.

Help!

Chappyd

[Al_The_Man]

Was this issued by the OEM as a direct replacement? As Proximities can come in NPN or PNP (sink or source).
If this is a direct replacement then in the absence of any other instructions, it would most likely be safe to assume that the original was Red+v, Black -v and White load or output.
The most common colours now are Brown +v, Blue-v and Black, output.
You should be able to confirm the original colour identity be how it is wired into the machine.
What is the make of the replacement?
Al.

[avtechmachine]

Hi Chappyd, we did replace switch like this before, here is how we connect it.
RED become Brown (+24V)
White become Black (to I/O Board)
Black become Blue (Com wire)

Ahn Vuong