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Answer Posted / saravana kumar
Higway Adressable Remote Transducer(digital signal) is a
digital circuitry in a transmitter, which is superimpossed
on analog 4 to 20 mA.This superimpossed signal is seperated
in I/O module and 4 to 20mA signal is given to the control
system and HART(digital signal)is given to Asset Management
System
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