Where is the analog ground on SC-2345?

[Ya-hoo]

I have an 4-20mA analog signal goes to a current model SCC-CI20 in SC-2345. Now I can see 60Hz noise on this analog signal. I wonder if the signal is grounded properly because two pins (+ and -)on SCC-CI20, I connected shield to - of the output and pin 3 (-) on SCC-CI20. Is there analog ground on SC-2345?

Can I remove those noise use soft filter, I mean the filter function come with labview?

Thanks

[sergesl]

Hello Ya-Hoo,

You can definetely use a digital filter to take out the 60 Hz noise, but the best way to get rid of it is to connect it the right way and reduce the noise. I have attached a PDF document of the manual for the CI20 below. Page 4 of the manual show how your signal should be connected.
There is also a great tutorial on how to connect to reduce noise. You can check the tutorial at http://zone.ni.com/devzone/conceptd.nsf/webmain/01f147e156a1be15862568650057df15?OpenDocument.