Electrical installation and wiring
4-14 Chapter 4: Installation 98-158751-C
4.3.8 To wire the CMU 1 and 2
ARINC-781 compliant.
Description
The Communications Management Unit (CMU) or equivalent is responsible for
integrating data communications or datalinks on the aircraft. The CMU manages
communication across multiple subnetworks, including VHF and SATCOM networks.
Wiring diagram
See Wiring – overview on page 4-7.
Pins for CMU 1 and 2
4.3.9 To wire aircraft AES ID
ARINC-781 compliant.
Description of the aircraft AES ID
AES ID input for reception of a unique aircraft identification code.
Wiring diagram
See Wiring – overview on page 4-7
Pins for aircraft AES ID
4.3.10 To wire cockpit audio 1 and 2
ARINC-781 compliant.
See also the wiring of the cockpit audio discrete interfaces in section 4.3.13.
CSDU pin Description
MP07J Data to CMU 1 and 2. A. (A429 output)
MP07K Data to CMU 1 and 2. B. (A429 output)
MP03A Data from CMU 1. A. (A429 input)
MP03B Data from CMU 1. B. (A429 input)
MP03J Data from CMU 2. A. (A429 input)
MP03K Data from CMU 2. B. (A429 input)
CSDU pin Description
MP07A Data from AES ID. A. (A429 input)
MP07B Data from AES ID. B. (A429 input)
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