BendixKing
AeroPanel 100 Audio Selector Panel
Installation and Operator’s Manual
89000063-011
Page 2-2
Rev. 0, April 2020
2.3.4
Audio Panel Tray and Connector Assembly
The rack connectors mate with two 44-pin connectors in the AeroPanel 100. The connectors are a sub-min-
iature crimp-type, and require the use a hand crimp tool, from table below (or equiv.). The connectors are
mounted to the tray back plate with #4-40 screws (475-440-1038), from the inside of the tray and the mount-
ing block, 431-891-0100. Ensure that proper strain relief and chafing precautions are made during wiring and
installation, using the cable clamp (625-001-0002).
Two grounding lugs are provided, which may be attached to the rear mounting plate with 2 ea. #4-40 x ¼”
screws with captivated lock washers. These provide a convenient location to connect the shield ground ter-
minations.
Manufacturer
Crimping Tool
Positioner
Extraction tool
AMP
601966-1
601966-6
91067-1
Daniels
AFM8
K42
M24308-1
ITT-Cannon
995-0001-584
995-0001-739
91067-1
Table 2-1 Connector Pin crimping tools
2.4 Cable Harness Wiring
Referring to the appropriate Appendix, assemble a wiring harness as required for the installation. All wires
must be MIL-SPEC in accordance with current regulations. Two- and three-conductor shielded wire must be
used where indicated, and be MIL-C-27500 or equivalent specification. Proper stripping, shielding and sol-
dering technique must be used at all times. It is imperative that correct wire be used.
Refer to FAA Advisory Circular 43.13-2B for more information. Failure to use correct techniques may result
in improper operation, electrical noise or unit failure. Damage caused by improper installation will void the
BendixKing warranty.
2.4.1
Electrical Noise
Due to the variety and the high power of radio equipment often found in today's general aviation aircraft,
there is a potential for both radiated and conducted noise interference.
The AeroPanel 100 power supply is specifically designed to reduce conducted electrical noise on the aircraft
power bus by at least 50dB. Although this is a large amount of attenuation, it may not eliminate all noise,
particularly if the amplitude of noise is very high. There must be at least 13.8 VDC present at the connector,
J2 pins 8 & 9, of the AeroPanel 100 for the power supply to work in its designed regulation. Otherwise, it
cannot adequately attenuate power line noise. Shielding can reduce or prevent radiated noise (i.e., beacon,
electric gyros, switching power supplies, etc.) However, installation combinations can occur where interfer-
ence is possible. The AeroPanel 100 was designed in a RFI hardened chassis and has internal Electromag-
netic Interference (EMI) filters on all inputs and outputs.
Ground loop noise occurs when there are two or more ground paths for the same signal (i.e., airframe and
ground return wire). Large cyclic loads such as strobes, inverters, etc., can inject noise signals onto the air-
frame that are detected by the audio system. Follow the wiring diagram very carefully to help ensure a min-
imum of ground loop potential. Use only Mil Spec shielded wires (MIL-C-275000, or better). Under no
circumstances combine a microphone and headphone wiring into the same shielded bundle. Always use a 2-
or 3-conductor, shield wire as shown on the installation-wiring diagram.
The shields can be daisy-chained together, and then connected to the ground lugs mounted on the back plate
shown in Appendix B.
Radiated signals can be a factor when low level microphone signals are "bundled" with current carrying
power wires. Keep these cables physically separated. It is very important that you use insulated washers to
isolate the ground return path from the airframe to
all
headphone and microphone jacks.
2.4.1.1
Music Inputs and Noise
AeroPanel 100 units utilize a differential input to help prevent noise from entering the music system. This
feature is usually transparent to the installer; however, it is important that the appropriate music signal and
