What is HART communications?
“HART” stands for Highway Addressable Remote Transducer. This is a low-speed, digital communications protocol. It runs simultaneously with, and on the same two wires as the conventional 4-20mA analog signal. HART is particularly useful when small amounts of data need to be transferred. Using HART, you can setup a transmitter and inquire about its health and status from time-to-time. HART communications is generally not useful when large amounts of data need to be transferred quickly, i.e. many times per second. For this type of communications, a higher speed digital protocol, such as Fieldbus, is required.
“HART” stands for Highway Addressable Remote Transducer. This is a low-speed digital communications protocol that operates at the same time as the primary analog output. HART communications is primarily intended for transmitter setup and occasional transmission of secondary process data, while the main process information, or “Primary Variable” is carried on the more rapid analog output.
