A
I have seen the views on the PNP & NPN inputs at control.com. however to take this dicussion further if we had a sinking type input and the hot wire (let us say ...+24VDC in this case) which run all around the plant gets shorted and if there were no Input fuses at individual channels, then would trip the 24VDC power supply which feed to various other inputs modules connected to it.
Wouldn't it cause a nuisance tripping of the plant?
What are your views if we have higher DC Voltages like 48VDC or 110VDC is it safe to run the hot wire in the plant to various sensors in the field?
When do we say we need sourcing type or sinking types considering the safety prespective?
Are there any standards governing the same?
plz provide your views.
Wouldn't it cause a nuisance tripping of the plant?
What are your views if we have higher DC Voltages like 48VDC or 110VDC is it safe to run the hot wire in the plant to various sensors in the field?
When do we say we need sourcing type or sinking types considering the safety prespective?
Are there any standards governing the same?
plz provide your views.