PS Engineering PDA360EX Installation Manual - Manual (Page 10)

PS Engineering Inc. ®
PAR100EX Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-760-0000 Page 2-3 Rev. 12, Jan. 2014
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 center
of the back plate.
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
PAR100EX units utilize differential music inputs 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 sig-
nal and ground connections are made directly to the dedicated music signal and ground inputs on the
PAR100EX. The power for IFE and audio panel should be a common bus.
If a music jack is installed for Music 1 or 2, we strongly recommend isolating the jack from airframe
ground, by using an insulated mounting plate.
NOTE
Adding a high-performance audio control system, particularly in conjunction with high-performance ac-
tive noise canceling headsets, cannot improve on older avionics that were designed for cabin-speaker use.
PS Engineering makes no claim that the audio panel will provide a noise-free audio quality under all in-
stallation conditions, particularly with older avionics.
2.4.2 Audio Panel Tray and Connector Assembly
The rack connectors mate with two 44-pin connectors in the PAR100EX. The connectors are a sub-
miniature 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
mounting 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).
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 PAR100EX Connector Pin crimping tools
2.4.3 Input Power (+12VDC)
As shipped from PS Engineering, the PAR100EX is compatible with 28 Volt DC systems.
If 12-volt system operation is desired, see section 2.9.
NOTE:
If the PAR100EX/M760REM is installed in 28V aircraft without properly configuring the unit,
the M760REM will be damaged. See §2.9.
A three (3) Amp circuit breaker is required for all installations. Power and ground wires should be #22
connected to J2 Pins 8 and 9. Connect airframe ground to J2 Pin 10 and 11 only.
The PAR100EX internal regulator supplies DC power to the M760REM VHF transceiver (12 VDC), and
has a dedicated three (3) amp circuit breaker from aircraft bus input into J2, Pin 44 for this supply.