资料介绍
4-20mA Power Management Texas Instruments Incorporated
Harnessing wasted energy in 4- to 20-mA
current-loop systems
By Chris Glaser
Applications Engineer
A 4- to 20-mA current-loop signal is frequently used in The current loop contains only one loop for current
industrial environments to transmit measurements across flow. Therefore, from Kirchhoff’s current law, the cur-
long distances, such as the temperature of a process or rent through all the elements in the loop is equal. This
the pressure in a tank. This type of signaling is preferred provides high noise immunity, which is critical in indus-
because of its s
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