Sunday, May 10, 2009

Split 4-20mA Loops without a Loop Splitter

Save money! Don't buy a loop splitter if you don't need one.

Users often specify dual-output 4-2omA current loop splitters in their systems. Common reasons include:

  • The need for an output boost to drive several loads at once.

  • The need to run independent isolated current loops to two different systems.

These needs often can be met with a less-expensive single-loop isolator. The diagram shows the basic idea - use the source transmitter to drive the isolator's input plus the first loop, then use the isolator's output to drive the second loop.

For our complete application note (pdf) click here , or visit and click on the Application Notes link.

1 comment: