Yes, the 211 can be used for 0-20mA inputs as well as 4-20mA inputs, you
just change the sci parameter. We have some FBM 211's (16 input
differential) at our mill as well as FBM 201's (8 point isolated). With the
211 you use a different TCA (termination cable assembly) depending upon
whether you need your loop powered or if it is externally powered. With
this scheme all 16 points on a FBM are I/A powered or field powered. The
201 lets you mix I/A powered and field powered loops on the same module. We
have a good luck with the 201's, not so good with the 211's. We ran into
problems (ground loops? not sure) with 211's that were field powered, so we
replaced all of those with 201's. We still have seven 211's that provide
loop power. There is a CAR about 211 points "freezing" or stopping
updating, their is also a fix for this. We have put in a CAR for a similar
problem with no resolution yet. We have seen on 2 occurrences 8 points out
of 16 elevate or lower by approximately 25% and then continue to update but
with incorrect readings. I would not suggest 211's for critical points.
"Syed Mavvaj Hussaini" <[EMAIL PROTECTED]>@lists.TheCassandraProject.org> on
07/29/2001 02:50:46 AM
Please respond to "Foxboro DCS Mail List"
<[EMAIL PROTECTED]>
Sent by: <[EMAIL PROTECTED]>
To: "Foxboro DCS Mail List" <[EMAIL PROTECTED]>
cc:
Subject: FBM 211
Dear all,
I need the info regarding FBM 211. I have 0- 20 ma inputs, weather I can
use
FBM 211?
Regards
Mavvaj
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