HART Loop Converter
Mar 16, 2009
HART Loop ConverterThe HART Loop Converter (HLC) allows users to access the digital information from HART-enabled field devices and makes it available to the analog world of process control. This allows access to a wealth of real-time values and opens completely new opportunities to achieve more targeted process control, detect critical situations at an early stage, and add more transparency and safety to the complete production process. The HLC is a transmitter power supply and HART monitor. It uses the HART protocol to communicate with the field device connected to it, and transfers its digital values into analog 4...20 mA signals. Up to three HART signals can be monitored at the same time and are provided as independent analog signals. The HLC allows access to additional functions of HART field devices for monitoring and control of production processes without requiring additional wiring and without the need to interfere in any other way into the existing communications infrastructure. In practice this means that the HLC converter contributes to protecting investments into the production control system by allowing access to the HART functionality of existing field devices, while preserving the available analog communications infrastructure. The HLC is equipped with two or four trip values. These can be programmed to monitor specific error conditions detected by the field device and will react as soon as a specific value falls below or exceeds a pre-defined trip value. This turns the HART Loop Converter into a reliable alarm device that is able to detect critical process parameters, and helps to keep the ongoing production process within safe operating conditions.
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