Yes, but it would be much cleaner if it were just part of the AO FBM's onboard
diagnostics. I would even settle for a single A/D for all output channels,
multiplexed between them on a 5 or 10 second cycle, if circuitry or PC board
space is an issue.
Thanks to all who responded.
Corey Clingo
Sr. Engineer
BASF Corporation
Would it be possible to loop the 4-20 ma output through a 4-20 ma input and
alarm it in the ain block? Another way might be to add a low value resistor
in the loop and monitor a voltage drop across it with an FBM 02.This would
take an extra input for each loop. I do not know what type of isolation
problem, if any, you might run into. I would wire it to a different FBM. If
this would work it would save you from
having to install a position transmitter on the valve.
Loyd Greer
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