What Is The Difference Between A Hart Patch Card And A Field Terminal Assembly?

A field terminal assembly is a DCS component where field signals are terminated. In a DCS using analog transmitter signals but smart remotely configured transmitters field signals from barriers are first brought to a HART patch panel. From here the analog signals are wired to the DCS field termination assembly or I/O card. The digital signals are wired to the HART multiplexes who extract the digital information and provide two way communication path between smart instruments and a computer running suitable software.