Ratio of Analog Input to Output - DCS

J

Thread Starter

Jonathan Law

Hi all,

I am trying to figure out the general ratio of Analog Input channels to Analog Output channels in an average DCS system.

Does anyone have a rule of thumb here? (eg 60:40).

Ideally any guidance on the split between Logical In: Logical Out: Analog In : Analog Out would be a massive help in my understanding.

Many thanks,
Jon
 
It all depends on how many Final control devices!
Depends on type of Industry, Process etc... Only thing I can say that Ratio will > 3 ~ 4 Analog Inputs are always high.
 
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