Learn about the 420 mA Loop Current basics, fundamentals, history, advantages, and disadvantages.

420 mA Transmitter Principle:
https://instrumentationtools.com/420...

PLC courses:
https://automationcommunity.com/

Video Topics ###

0:00 Basics of 4 to 20 mA
0:38 History of 420 mA Signals
1:57 PLC Basics with 4 to 20 mA Transmitter
4:13 Why do we use 4 to 20 mA Loop Current?
6:12 Live Zero Advantage of 420 mA
7:47 Why 4 mA?
9:10 Why 20 mA?
9:36 Linearity and 1:5 ratio
11:22 Easy conversion from 420 mA to 15 volts
12:54 Advantages of Current Signals
13:20 Advantages of 4 to 20 mA Signals
13:50 Disadvantages of 420 mA Signals


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