Dear Friends
We have a few Hartmann&Braun DP Transmitters with 0...20ma output, but our control system need 4...20ma signal. Is there any way to convert 0...20ma to 4...20ma ?
Yours Faithfully
Hooshang Farhadi

 

see at "http://www.actionio.com/products/transpak/t703.html":http://www.actionio.com/products/transpak/t703.html

 

The simplest way is to use an interface converter, available from a variety of companies. We use Phoenix contact & have good results with their equipment

 

You could use the following "0-5DVC to 4-20mA converter" with a 250ohm resistor across the input (to convert the 0-20mA to 0-5V):

"http://www.andeaninstruments.com/english/products.html#tr":http://www.andeaninstruments.com/english/products.html#tr
Go to the Voltage (VDX) link near the bottom or just download this manual.

"http://www.andeaninstruments.com/docen/Interfaces/Voltage/VDX.PDF":http://www.andeaninstruments.com/docen/Interfaces/Voltage/VDX.PDF

You would have to supply this converter with 24VDC power.

 

There are quite a few companies who make signal converter modules for exactly this application. These are normally small DIN rail mount devices.
Try Phoenix, Entrelec, Wiedmuller, Wieland, Action Instruments, etc.

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Michael Griffin
London, Ont. Canada
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Have had great results with Moore Industries,
"www.miinet.com/":http://www.miinet.com/

 

See Acromag's 654T-0600 (using conversion resistor), 611T-0500, or IntelliPacks 811T-0500. http://www.acromag.com