HART makes use of the known 4 – 20 mA standard signal for analogue data transmission. HART communication is modulated as additional signal to the analogue signal. Advantages: Simultaneous transmission of the digital and the analogue HART signals. Existing 4 – 20 mA infrastructure is also available for digital communication. Facilitates reading additional parameter and diagnostic data from field devices.
HART is based on the master/slave principle. The optional multidrop topology essentially complies with the line structures of fieldbus systems. In most cases, the conventional 4 – 20 mA point-to-point commmunication is used.
- International standard (fieldcommgroup.org)
- Worldwide distribution
- Large installation baseStandardised integration within the DCS (FDT, EDD)
- Large selection of devices