ABSTRACT
ARINC 429 is the most widely used data transfer medium used in aviation. It first entered service in the early 1980s as the age of digital avionics introduced. Due to its low cost and simplistic form, ARINC 429 continues to be used in applications requiring low to moderate data rates. An ARINC 429 interface consists of a single transmitter—or source—connected to up to 20 receivers—or sinks—using a twisted pair wire. Data flows in one direction only, that is, simplex communication. Bi-directional data transfer is accomplished using two ARINC 429 buses. ARINC 429 can send data at a maximum rate of 100 kilobits per second. Over the years, ARINC has published a number of data transfer standards for use within the airline industry. ARINC Specification 429, Digital Information Transfer System was first published in July 1977. ARINC Specification 429 is an example of one of the many documents prepared by the Airlines Electronic Engineering Committee and published by ARINC.
