HART

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.

• International standard (
• Worldwide distribution
• Large installation baseStandardised integration within the DCS (FDT, EDD)

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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