I have been working as an instrument engineer in Refinery and chemical factory.
As you might know, we use push button switch to stop machine or process.
We use NC because safety. However sometimes machine or process would be stop by push button contact failure.
So, we would like to improve push button reliability using voting contacts or push button.
If you know standard or code where i refer to apply, please rely my thread..
And I would like to discuss about how to solve this matter.
thank you for reading...
Young from Korea