Forgive me if this seems like a stupid question

Join Date
Mar 2009
Location
oakville, ontario
Posts
88
But this is something that I've always tended to get azz-backwards o_O

Most of my programing expearence - and my education for that matter have delt with equipment and hardward that labeled DC devices and/or inputs as "sinking" or "Scourceing" now as you also know alot of devices use the terminology NPN and PNP to describe their DC output or input connections - i USED to be really familar with this but its been a while since i have had to use anything labeled NPN/PNP - so was wondering if someone could quickly remind me which was which.

Man i feel like i need a coffee
 
Someone once told me a good way to remember PNP is to think of it as P(ositive)N(into)P(rocessor). Hopefully he wasn't azz-backwards because this is one thing i haven't forgotten.
 
The NPN is a Sinking device. One side of a load is attached to a positive DC voltage and the other side of the load is attached to the input (NPN)of the PLC. The PNP is just the opposite.
 
P(eeing) aNd P(eeing) is like Sourcing and sourcing da pee, ya see. PNP = Sourcing

While Not P(eeing) Nope, would be like not sourcing, therefore Sinking. NPN = Sinking
 

Similar Topics

Ok, so I've got a decent amount of experience working with Logix 5000, but I'm a little fuzzy on the details of something. I know that Logix 500...
Replies
11
Views
3,610
but i am fairly new to programing with a USB-serial converter (my old serial port equipped laptop finally gave me the blue screen of death...
Replies
2
Views
1,639
Good Evening , I have an " Oddball " Blower Motor , and really do not have any U.S. support . It is a manufacture called EBM Papst and the...
Replies
4
Views
1,113
I'm one to grab hold of a gift horse's mouth, shine a torch down it's throat and have a bloody good look... I've only really used A-B...
Replies
8
Views
3,404
Hey guys, I'm seeing some odd behavior with some MSG instructions I have set up. Specifically, when I enable the MSG instruction I nearly...
Replies
5
Views
5,960
Back
Top Bottom