Romilly's HART® and Fieldbus Message Board
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Multidropping 4 wire HART devices
Message posted by John Emmett (jemmett@mooreind.com : 83.67.76.222) on 23 July 2010 at 08:56:59.
Can you multi drop 4 wire, externally powered HART transmitters. In 2 wire multidrop, the transmitters are fixed at 4mA sink. The 4 wire devices will be sourcing 4-20mA. If they all source 4mA, won't there be a conflict?
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