ndzied1
Lifetime Supporting Member
We were having a discussion here about E-Stop circuits and more specifically using a lighted push button to power on the E-Stop Circuit.
One of the people here is saying that he's used to the light inside the button that energizes the E-Stop circuit coming on when the Estop circuit is de-energized to attract the operator's attention and so it would function as a "Reset Required" light. Circuit 2 in image below.
I haven't seen any machines like that and would say the top circuit in the attached picture looks more standard to me. Maybe some would say the light should be White instead of Blue?
Note that this is a simplified circuit. We almost always use dual channel e-stop circuits and safety relays now but the idea is to talk about if you would use a lighted pushbutton to reset the safety circuit and if so, how would it function.
One of the people here is saying that he's used to the light inside the button that energizes the E-Stop circuit coming on when the Estop circuit is de-energized to attract the operator's attention and so it would function as a "Reset Required" light. Circuit 2 in image below.
I haven't seen any machines like that and would say the top circuit in the attached picture looks more standard to me. Maybe some would say the light should be White instead of Blue?
Note that this is a simplified circuit. We almost always use dual channel e-stop circuits and safety relays now but the idea is to talk about if you would use a lighted pushbutton to reset the safety circuit and if so, how would it function.