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)
Large installation baseStandardised integration within the DCS (FDT, EDD)
Large selection of devices
AUMA actuators with HART
- 4 – 20 mA HART analogue signal either for setpoint transmission or alternatively to communicate the actual position.
- Transmission of parameter and diagnostic data via digital HART communication
- approx. 500 ms per actuator for digital communication
- Integration within the DCS via EDDL
- Length of cable approx. 3 km
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