pneumatics questions - diagram attached

Don Baer said:

I agree something that is required on a punch press.

Click to expand...

That's it, I could think of the name.

It's called a Two-Hand Anti-tiedown circuit. You have to press the two buttons within a small time delay, so you can't "tie down" one switch. I guess you could have only one button if it was far enough away that you couldn't reach the danger zone with your other hand.

Bob