TimothyMoulder
Member
This is a variation on the usual NPN-PNP conversion theme that I did not find while searching the site.
I have a PLC output that is PNP (sourcing), and a labeller input that is also PNP (sourcing). I want to connect these two without using a relay, since this labeller is very susceptible to bouncing.
I had considered a pulldown resistor:
But I was unsure how this would work. If the PLC puts out 24 VDC, and the Labeller input is floating at about .07VDC, could I fry the labeller input?
Anyway, I'm using a relay with capacitor debounce, but I'd still like to know if this arrangement could have worked. I'm out of time to try and experiment, so do one of you know?
Thanks!
TM
I have a PLC output that is PNP (sourcing), and a labeller input that is also PNP (sourcing). I want to connect these two without using a relay, since this labeller is very susceptible to bouncing.
I had considered a pulldown resistor:
PLCout -----------Lin
I
I
R 1K
I
I
COM---------------COM
But I was unsure how this would work. If the PLC puts out 24 VDC, and the Labeller input is floating at about .07VDC, could I fry the labeller input?
Anyway, I'm using a relay with capacitor debounce, but I'd still like to know if this arrangement could have worked. I'm out of time to try and experiment, so do one of you know?
Thanks!
TM