This document provides an overview of ARINC 429, one of the most commonly used databuses for commercial and transport aircraft. It explains the origins of the ARINC Corporation, the databus specification, where ARINC 429 is used and also summarizes the principal electrical and data characteristics which are defined in the specification. Please note this is not a complete description of ARINC 429 and is only intended as a brief tutorial. It is not meant to replace the complete specification.

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