ARINC 729-1 : 1981

1.0 INTRODUCTION
1.1 Purpose of this Document
1.2 Summary of Operational Characteristics
1.3 Brief Description of the System
1.4 Interchangeability
1.5 Integrity and Availability
1.6 Regulatory Approval
2.0 INTERCHANGEABILITY STANDARDS
2.1 Introduction
2.2 Form Factors, Connectors and Index Pin Coding
2.2.1 Analog Data Converter (ADDCU)
2.3 Interwiring
2.4 Power Circuitry
2.5 System Functions and Signal Characteristics
2.6 Environmental Conditions
2.7 Cooling
2.8 Grounding and Bonding
3.0 STANDARD SIGNAL CHARACTERISTICS
3.1 Interface Standards
3.2 Analog Data Inputs
3.3 Discrete Data Inputs (On-Off Signals)
3.4 Reference Inputs
3.5 Reference Outputs
3.6 Standard Outputs
4.0 ANALOG AND DISCRETE DATA CONVERTER SYSTEM DESIGN
4.1 System Partitioning
4.2 Hardware Functions
4.3 Firmware Functions
4.4 ADDCU Inputs
4.5 Output Data Format
4.6 Self-Test and Maintainability
4.6.1 Fault Indication
4.6.2 BITE Status Word
4.6.3 Sign Status Matrix Bits
4.7 Excitation Output Signals
5.0 PROVISIONS FOR AUTOMATIC TEST EQUIPMENT
5.1 General
5.2 Unit Identification
ATTACHMENTS
1-1 Typical Airborne Sub-system Block Diagrams
1-2 ADDCU Connector Placement
2 Standard Interwiring
Notes Applicable to the Standard Interwiring
3 ADDCU Connector Insert Pin Layout
4-1 EADAC Typical Signal Processing
4-2 SDAC Typical Signal Processing
5 Input Connector Pin Assignment Standards
6 Guidance for Input Isolation
7 Digital Data Output Characteristics
7-1 Label Codes and SDI Code Application
7-2 Data Standards Summary (All data BNR)
7-3 Discrete Word Bit/Discrete Input Correlation
8 Environmental Test Categories
APPENDICES
1 Chronology and Bibliography