Electrical installation and wiring
98-127093-H Chapter 5: Installation 5-25
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5.3.4 Wiring ARINC 429 interfaces
Wiring an ARINC 429 source system
The SBU has two ARINC 429 input interfaces for two navigational inputs.
For instructions how to install and set up the IRS, AHRS, NPI or GNSS system
see the respective installation manual.
The following drawing shows the wiring of a navigational input. Requirements to the cables
are stated in the section Cable requirements, ARINC 429 on page 5-29.
Pins for input from ARINC 429 sources
The pins for navigational input are located in the bottom plug of the SBU rear receptacle.
Description of the interface for navigational input
When the system is configured with the web interface, the CM contains the information:
• Which navigational input is selected: IRS, AHRS, NPI or GNSS.
• Whether primary or secondary input or both are installed.
If primary and secondary ARINC 429 navigational input are both installed,
they must be of the same type (IRS, AHRS, NPI or GNSS).
• ARINC 429 Speed (High or Low). The primary and secondary navigational inputs can
individually be set to high or low speed, depending on y
our configuration.
Note
The source for navigational data over ARINC 429 can be either an IRS, AHRS, NPI,
GNSS or another navigational input compatible with the requirements in this
section.
Important
Figure 5-16: Wiring ARINC 429 navigational input
6HFRQGDU\
$5,1&
+6/6$5,1&5;
3ULPDU\
$5,1&
+6/6$5,1&5;
77$
6%8
%3
%3
%3
%3
SBU pin Name/description
BP5 Data from primary ARINC 429 navigational input A
BP8 Data from primary ARINC 429 navigational input B
BP7 Data from secondary ARINC 429 navigational input A
BP13 Data from secondary ARINC 429 navigational input B
Table 5-10: SBU pins for input from a navigational ARINC 429 source
Note
SB-Lite.book Page 25 Tuesday, September 5, 2017 1:38 PM
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