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Current Loop Schematics

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Current Loop Interface

Current Loop Interface

very simple circuit to interface a current loop sensor to an input which is designed for a voltage

http://www.4qdtec.com/curli.html

4- to 20-mA loop needs no external power source

4- to 20-mA loop needs no external power source

Uses a low-current-drain MAX4073H amplifier to sense the current flowing through a 4- to 20-mA loop.

http://www.e-insite.net/ednmag/index.asp?layout=article&articleid=CA154820

Small circuit forms programmable 4- to 20-mA transmitter

Small circuit forms programmable 4- to 20-mA transmitter

http://www.e-insite.net/ednmag/index.asp?layout=article&stt=000&articleid=CA289969&pubdate=4%2F17%2F2003&spacedesc=designideas

4-20 mA Digital to Process Current Transmitter

4-20 mA Digital to Process Current Transmitter

Describes a three IC, 4-20 mA process current, digital-to-analog converter

http://www.analog.com/UploadedFiles/Application_Notes/266329066AN21.pdf

Single Supply 4-20mA Current Loop Receiver

Single Supply 4-20mA Current Loop Receiver

The current loop can be sourcing or sinking and can be referenced to either the power-supply V+ or ground.

http://www.ti.com/sc/docs/psheets/abstract/apps/sboa023.htm

Convertisseur 4-20 mA vers 0-10 Volts

Convertisseur 4-20 mA vers 0-10 Volts

conversion circuit between 0-20mA and 0-10V interface

http://users.swing.be/gonzague.colpaert/circuits.html

HARTŪ 4 to 20 mA Current Loops

HARTŪ 4 to 20 mA Current Loops

http://www.bb-elec.com/tech_articles/current_loop_app_note/not_digital_current_loop.asp#42