HART Protocol

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With HART, additional parameterization and diagnostic functions, as well as process data, are available in addition to the 4 ... 20 mA signal.

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HART is the leading communication technology in the process industry. HART is used by intelligent field devices to exchange digital information via the 4 ... 20 mA analog signal. Use HART-compatible interfaces from Phoenix Contact for reliable and inexpensive communication between field devices and the higher-level control system.

 

Your advantages

  • Easy construction of a rugged digital communication network, thanks to the use of existing 4 ... 20 mA wiring
  • Efficient field device configuration and status diagnostics, thanks to online access
  • Increased system availability, thanks to preventive detection of deviations and errors
  • Error-free bidirectional data exchange with HART-transparent isolating amplifiers - electrically isolated, even for intrinsically safe circuits
  • Integration of HART information in separate engineering and management systems – thanks to HART multiplexer solutions
  • Long distances covered and inexpensive retrofitting of system parts – with WirelessHART devices.

 

Reliable analog technology as a carrier for digital information

HART (Highway Addressable Remote Transducer) is a global protocol standard in the process industry. A HART-compatible higher-level unit, such as a control or monitoring device, usually communicates with a HART-compatible field device.

Digital information is modulated to the 4 ... 20 mA signal with the help of frequency shift keying (FSK) without causing an interruption.

4 ... 20 mA signal technology is a quick and reliable standard and supplies the actual measured value from the field. The superimposed digital signal provides additional information, such as device configuration and diagnostic data. This in turn increases the availability and efficiency of your system.