Back To Basics: The Fundamentals of Loop-Powered Devices
26 May 2015
A fundamental principle of electricity is that current is the same at all points in a closed current loop. This is why the 4-20 mA current loop is the ideal analog standard for transmitting information over long distances, and through multiple meters, transmitters, data loggers, and other 4-20 mA loop devices. In this article you will learn what a loop-powered device is, what their characteristics are, and the advantages and weaknesses of using loop-powered devices. You will also get a better understanding of when to use, or not to use a loop-powered device.