Northern Airborne Technology AA85 - Manual (Page 17)

SM38 Rev. 4.10 AA85 InterVOX II™ Intercom Manual
Jun 9, 2004 Page 2-3
ENG-FORM: 805-0106.DOT
Amendment #1 Jan 18, 2005
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
2.3.4 Cabling and Wiring
All unshielded wire shall be selected in accordance with AC43.13-1B Change 1,
Paragraphs 11-76 through 11-78. Wire types should be to MIL-W-22759 as specified in
AC43.13-1B Change 1, Paragraphs 11-85, 11-86, and listed in Table 11-11. For
shielded wire applications, use Tefzel MIL-C-27500 shielded wire with solder sleeves
(for shield terminations) to make the most compact and easily terminated interconnect.
Follow the wiring diagrams in Section 2.6 as required.
Allow 3 inches from the end of the wire to the shield termination to allow the hood to be
easily installed. Note that the hood is a ‘clamshell’ hood, and is installed after the wiring
is complete.
Note: When replacing a previous AA80 series Intercom with an AA85 serial # 3000 and
above, harness changes are necessary to ensure compliance of the AA85 with
the approved TSO configuration. Refer to Section 2.3.3 for further details.
All wiring should be at least 24 AWG, except power and ground lines, which should be
at least 20 AWG. Ensure that all ground connections are clean and well secured.
To prevent system failure or inadequate equipment protection, supply power from a
dedicated 2.0 A circuit breaker.
Group the mic audio shields
separately from all other audio
shields.
Utilizing Raychem solder sleeves,
create up to 6 shield pigtails in the
wiring harness, as shown in the
Interconnect Diagram
(AA85\001\403-x, Rev 2.00 or
higher). Each pigtail should be no
more than 3.0” long.
Bring the pigtails through the
rubber grommet and strip off 0.5”
of insulation.
Bend the stripped portion back
onto the grommet as shown and
sandwich the pigtails between the
connector hood and the grommet.
Note: The hood is a ‘two-piece’
unit, and is assembled after
the wiring is complete.
Metal Hood
Raychem
Solder Sleeves
Rubber
Grommet
Stripped
Pigtail