I used these buttons so I could use the 24 volt power supply for the illuminated buttons.
Each button has five connection points that are clearly marked, you need 4 of them to make them work properly.
2 pins are marked: “-” and “+” - these are for the 24v light to keep them illuminated. I used a terminal strip inside my enclosure to break out all of the voltages for easy access. But, just as easy to add a wire from the pos and gnd of the power supply.
The three center pins are marked, “NC” - normally closed, “NO” - normally opened, and “C” - common.
Make a connection between the “C” - common connection of the button and Arduino GND pin. (Again, I used terminal strips inside the enclosure to make wiring much easier)
Make a connection between the “NO” - normally open connection and the:
A2 Arduino pin (Green Button- Cycle Start/Resume)
A1 Arduino pin (Yellow Button- Feed Hold)
A0 Arduino pin (Red Button- Reset/Abort)
For the E-Stop I used the one oat the inventables online store:
https://www.inventables.com/technologies/e-stop-button
I wired the E-stop so it cuts all power to the powersupply and the router IOT relay. Basically as the power comes into my enclosure the E-Stop is wired first, then power goes to the switch on the back of the enclosure, then the switch on the front of the enclosure and then onto the powersupply…this way all three switches have to be on for power to reach the machine.
Here is a picture of the front of the enclosure and the machine: