PLC Question

hgmjr

Joined Jan 28, 2005
9,029
These questions appear to be part of a homework assignment or perhaps test questions.

I recommend you give them a shot and then post your answers for the membership to take a look at and comment upon.

hgmjr
 

Thread Starter

Dave1971

Joined May 17, 2007
4
These questions appear to be part of a assignment.

I recommend you give them a shot and then post your answers for the membership to take a look at and comment upon.

hgmjr
Hi,

They are part of a assignment, i haven`t a clue on how to answer these question, all i know is analogue signals have problems with noise.
 

Jimbo3123

Joined May 15, 2007
1
Ugh, normally I hate it when people come to the forums for homework answers.

I will try to give you a little direction though.
i. What does a current loop have in common at every point (Think KCL)?. How would this be an advantage over a voltage signal with long (possibly unknown) wire runs/voltage drops?

ii. Look at the price difference between an analog input and digital input card for any PLC mfg.
 
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