Revision as of 23:51, 8 November 2024 edit 198.29.191.128 (talk) Corrected Grammar ← Previous edit		Latest revision as of 23:55, 8 November 2024 edit undo 198.29.191.128 (talk) Corrected sentence structure to make text easier to read.
Line 13: The '''HART Communication Protocol (Highway Addressable Remote Transducer)''' is a hybrid analog+digital industrial automation open protocol. Its most notable advantage is that it can communicate over legacy 4–20 mA analog instrumentation current loops, sharing the pair of wires used by the analog-only host systems. HART is widely used in process and instrumentation systems ranging from small automation applications up to highly sophisticated industrial applications. ~~HART~~Based ~~is an in~~on the [[OSI model]], HART resides aat Layer 7, the Application Layer. Layers 3–6 are not used.<ref>instrumentationtools ''https://instrumentationtools.com/hart-communication-tutorial-part-3/'' </ref> When sent over [[current loop\|4–20 mA]] it uses a [[Bell 202 modem\|Bell 202]] for layer 1. But it is often converted to RS485 or RS232.

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