Proximity switches or limit switches

[JAZZCNC]

WiringDia_compressed.pdf

So this wiring diagram is how the home switch works. Next question is how do I wire two of the same NPN NC switches in series to act a limit switches.
Regards Chris

You are using an IP-M why would you wire them in series you're not short of inputs surely.? Wiring prox switches in series slows there reaction time so it, if not needed, wouldn't do it.

However, if you must do it then simply take the Signal wire (black) from first switch to the (0V) on the second and repeat for any further switches in wired series. On the last switch take the Signal to the IP-M (-)input.