Posts Tagged control basics
Why has 4-20 mA gained so much acceptance and survived so long?
Posted by danstips in 4-20mA, Control, Process terminology, Standards on June 25, 2014
Last month, I presented a webinar for our customers. At the end of Control 101, when we opened the session up for questions, a customer asked about making the choice between 4-20 mA and digital signal outputs. It got me thinking about this list I put together a while back — one that I pull out whenever customers ask me “Is 4-20 mA still valid?”
The answer: Yes, it is. And here are the 18 reasons I came up with… so far. Read the rest of this entry »
