14.10 Basics of HART
14.10.1 Introduction
Description
With the HART functionality, you can additionally operate the analog modules with digital
communication options. The HART protocol is generally accepted as a standard protocol for
communication with intelligent eld devices. HART is a registered trademark of the "HART
Communication Foundation" (HCF), which owns all the rights to the HART protocol.
Note
The HART analog modules support the HART protocol version 6.0.
14.10.2 Properties of HART
Advantages of HART
Using HART analog modules oers the following benets:
• Connection compatibility with analog modules: Current loop 4-20 mA
• Additional digital communication using the HART protocol
• Low energy consumption with HART, important for use in hazardous areas
• Numerous eld devices with HART functions are in use
Typical applications of HART
• Commissioning of eld devices (centralized setting of parameters)
• Online modication of eld device parameters
• Information, maintenance and diagnostic displays for the eld devices
14.10.3 Principles of HART operation
Introduction
The HART protocol describes the physical form of the transfer:
Transfer procedures, message structure, data formats and commands.
Analog electronic modules
14.10 Basics of HART
ET 200iSP
390 Operating Instructions, 11/2022, A5E00247483-AK
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