Knowra ARINC 429 ARINC 429 ARINC 429 is a one-way digital data-bus standard for communication between avionics equipment. It specifies electrical signaling, word format, and transmission rates.
ARINC 429 word : A 32-bit unit of ARINC 429 data containing fields for a label, status, payload, and parity. Every transmission uses this fixed structure to identify and encode one item of avionics data.
Avionics : Electronic systems used in aircraft, including navigation, communication, flight control, and monitoring equipment. ARINC 429 connects equipment within this broader set of aircraft systems.
Air data computer : An aircraft computer that derives airspeed, altitude, and related quantities from sensor measurements. It sends air-data values to other avionics over ARINC 429 channels.
MIL-STD-1553 : A military aircraft data-bus standard using a command-and-response architecture over shared redundant buses. Unlike ARINC 429's one-way channels, it coordinates bidirectional communication through a bus controller.
Bipolar return-to-zero : A line code that represents bits with positive or negative pulses returning to zero between pulses. ARINC 429 uses this signaling pattern to transmit bits over its differential pair.
Avionics data bus : A communication system that transfers digital data among electronic equipment in an aircraft. ARINC 429 is one specific standard within this family of aircraft networks.
Flight management system : An aircraft system that plans and manages navigation, performance, and flight operations. It exchanges navigation and aircraft-performance data with other equipment through the bus.
ARINC 629 : An aircraft data-bus standard that allows multiple terminals to transmit without a central bus controller. It was designed to support more flexible shared communication than ARINC 429's one-transmitter channels.
Differential signaling : A method that encodes information as the voltage difference between two conductors. The bus uses a twisted pair whose differential voltage carries each transmitted bit.
ARINC 429 receiver : An avionics interface that detects and decodes words arriving on an ARINC 429 bus. A receiver interprets the transmitted labels and payloads but does not transmit on that channel.
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