PS Engineering Inc. ®
PAR100EX Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-760-0000
Page 2-8
Rev. 11, Feb. 2013
J1, pins 31, 29 and J2 pin 15 are unswitched, unmuted inputs # 1, 3 and 4, respectively. These inputs are
presented to the pilot and copilot regardless of the audio configuration, and will always mute the enter-
tainment inputs. These 510Ω inputs can be used for altimeter DH audio, GPS waypoint audio, autopilot
disconnect tones, or any other critical audio signal.
The audio low for unswitched #4 (J2, pin 15) should be connected to a convenient audio low. However,
this should NOT be connected to Music Low.
Unswitched #1 is presented to the pilot headphone in fail-safe (off) mode.
NOTE
Inputs 1, 2 and 4 are fixed (1:1), and any audio level adjustments must be made at the input source. Unswitched #3
has a variable adjustment control located on the bottom side of the unit. This control allows you to control the volume
level of that unswitched input from 50% to 200% of the input level. Refer to Adjustments section.
2.7 Intercom wiring
See Appendix C and D for intercom connection configurations. It is critical to the proper operation of this
system to have this connector wiring made in accordance with these diagrams. Use 2- and 3-conductor,
MIL-spec cable as shown. Connect the shields at the audio panel end only, and tie to the audio low inputs
as shown.
NOTE
The system harness can be custom made by PS Engineering, Inc. Simply call the factory or
www.ps-
engineering.com
to obtain a wire harness work sheet. The harness will be made to your specifications and
fully functionally tested. Harness can be ordered with jack, or without the intercom jacks installed, for
easier wire routing through the aircraft.
2.7.1
Entertainment Inputs
The PAR100EX has two INDEPENDENT inputs wired into the rear connectors, in addition to the Blue-
tooth® music streaming (which is presented as Music 1). Entertainment input number 1 is J2 pins 23 (left
channel) and 24 (right channel), with respect to pin 25, and Entertainment number 2 is connected to 26
(left channel), 27 (right channel), with respect to 28.
Music #1 is available to the pilot and copilot positions, only, in normal configuration. Music 1 can be hear
by all aircraft occupants, if Music 1 all headsets is activated. See §2.7.1.1
Music 2 is only heard by the passengers.
See § 3.9 for music distribution information.
NO T E
Use t h e l ow l evel ou t p u t of a n y a d d i t i on a l en t er t a i n m en t d evi ce t o con n ect t o t h e a u -
d i o p a n el . Ma x i m u m si g n a l l evel i s
3 VAC
p - p .
DO NO T
u se a sp ea k er - l evel ou t p u t ,
t h i s wi l l ca u se i n t er n a l d a m a g e i n t h e a u d i o p a n el .
2.7.1.1 Music 1 all headsets (J2, Pin 22)
If J2, Pin 22 is connected to aircraft ground, Music 1 will also be heard in the passengers’ headsets. Music
2 will be disabled when J2, Pin 22 is grounded.
2.7.2
Entertainment muting
The PAR100EX-system incorporates a "Soft Mute™" system. This will mute the entertainment devices
during intercom conversation or radio reception. The four muting modes are controlled by the front panel
“Mute” button. See §3.9 for more information.
CAUTION
Local oscillators and internal signals from entertainment equipment can cause undesired interference with
other aircraft systems. Before takeoff, operate the entertainment devices to determine if there is any ad-
verse effect within the aircraft systems. If any unusual operation is noted in flight, immediately switch off
the entertainment devices.
