PS Engineering PAC15 - Manual (Page 11)

PS Engineering Inc. ®
PAC15EX Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-015-0000 Page 2-5 Rev. 1, Jan. 2014
is always presented to the crew headphones, and is available to the pilot in fail-safe (off) mode.
Unswitched 3 and 4 inputs are always presented to the crew headphones.
Unswitched
Input
Input
Pin
Hear in
Fail Safe
Hear in
Crew Headset
Gain
1 J1, 31 Yes Yes 1:1(fixed)
2 J1, 44 No Yes 1:1(fixed)
3 J1, 29 No Yes Adjustable
4 J2, 15 No Yes 1:1(fixed)
Table 2-2 Unswitched input table
The audio low for unswitched #4 (J2, pin 15) should be connected to a convenient audio low such as J2,
Pin 40. However, this should NOT be connected to Music Low (J2 pin 36 or 38).
Unswitched #1 (J1 Pins 31 & 32) 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.
2.5 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 Controller 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.
2.5.1 Entertainment Inputs
The PAC15EX has two INDEPENDENT inputs wired into the rear connectors. Entertainment input num-
ber 1 is J2 pins 23 (left channel) and 24 (right channel), with respect to pin 25, and Entertainment num-
ber 2 is connected to 26 (left channel), 27 (right channel), with respect to 28.
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 Au -
d i o C on t r ol l er . 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 Au d i o C on t r ol l er .
2.5.2 Entertainment muting
The PAC15EX-system incorporates a "Soft Mute™" system. This will mute the entertainment devices
during ICS or radio conversation. The four muting modes are controlled by the MFD. See §3.7 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.
All entertainment devices must be switched off for both takeoff and landing.