Corey,
We installed Rosemount 3051 and 1151 intelligent transmitters with FBM05s
and FBM04s here about 1998. To make the HART communicator function reliably
with the Foxboro modules in the loop, you need more than 250 ohms loop
impedance. I think we ended up using about 370 ohms installed locally at
the transmitter panels, and everything worked fine. We use the HART
communicators locally.
This is a nice simple sledgehammer approach and has worked for us so far.
==================================================
Gaylon Hicks
Tennessee Valley Authority, Browns Ferry Nuclear Plant
Mail Stop PEC-2C
PO Box 2000
Decatur, AL 35609
Phone: (256) 729-7804 Fax: (256) 729-2047
email: [EMAIL PROTECTED]
FedEx Address: Shaw Road, Athens, AL 35611
==================================================
----------
From: Corey R Clingo[SMTP:[EMAIL PROTECTED]]
Sent: Thursday, March 15, 2001 1:24 PM
To: Foxboro DCS Mail List
Subject: Drop resistor on analog input cards
Does anyone know if I/A analog input cards (FBM01/04 in my case) can
be had with
250-ohm dropping resistors? My meter tells me the ones we have are
50-ohm, and
most HART handhelds we've used require 250-ohm loop resistance to
function
properly.
TIA,
Corey Clingo
Sr. Engineer
BASF Corp.
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