PS Engineering PMA7000CD Installation Manual - Manual (Page 15)

PS Engineering
PMA7000CD- Series Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-790-0010 Page 2-7 Revision 10, September 2005
2.5.16 Remote CD wiring
The remote CD Player is powered from the avionics bus through a 2 A PULL TYPE Breaker.
The PCD7100-R is interfaced to the PMA7000CD through a 6-conductor data cable and a 3conductor au-
dio cable. These cables must conform to the MIL-C-27500.
2.5.16.1 Entertainment Input
The remote compact disc player is designed to interface with the audio panel as input number 1 J2 pins 15
(left channel) and 16 (right channel), WRT pin T, and is provided to the pilot and copilot. Entertainment
number 2 is provided to the passengers at all times.
In order to use the remote player to provide music to the passengers, it must be interfaced to Entertainment
2 input pins 13 (right), 14 (left), WRT pin R. We recommend installing a DPDT switch to allow isolation
of the music sources if desired. In addition, a volume control for the passengers’ music level is recom-
mended. PS Engineering kit Part Number 250-790-0020 is available. See wiring instructions, top connector
for more details.
N O T E : Use th e lo w lev e l out put of any addi t i onal ent e rt ai nm ent devi ce t o connect t o
the audio panel. Maximum signal level is 2 VAC p-p.
D O N O T u s e a sp eak er-lev el o u t p u t , th is will cau se in tern al d a m a g e in th e au d i o
panel.
2.5.16.1.1 Entertainment muting
The PMA7000CD-system incorporates a "Soft Mute" system. This will mute the entertainment devices
during ICS or radio conversation.
Any signal appearing in the unswitched audio inputs will always mute the entertainment sources, even
though the passengers may not hear the audio tone itself.
Caution: Local oscillators and internal signals from entertainment equipment other than the PCD7100-R
can cause undesired interference with other aircraft systems. Before takeoff, operate the entertainment de-
vices to determine if there is any adverse effect within the aircraft systems. If any unusual operation is
noted in flight, immediately switch off the entertainment devices.
All additional entertainment devices must be switched off for both takeoff and landing.
2.5.16.1.2 Entertainment 2 Mute (Pin V)
The ICS button on the PMA7000CD controls the muting (“Karaoke mode”) of entertainment source #1.
Connecting J2 pin V to ground through a SPST switch places the entertainment #2 music source into the
Karaoke Mode. In this mode, incoming music and intercom conversation will not mute the music for the
passengers’ intercom net. This allows uninterrupted music during casual conversation and at times when
radio communications are of lesser importance. See section 2.5.14 for alternative connection.
2.5.17 PMA7000CD Intercom expansion (J2, Pins P, S, and C)
The PMA7000CD contains a 6-place intercom. In applications where more intercom positions are needed,
PS Engineering can provide intercom expansion units, such as the IntelliPAX, part number 11606,
11606R, etc. These can add up to six additional stereo intercom stations, plus independent music input.
Interface to the expansion unit is through J2, pins P (audio input from expansion unit), S (audio output to
expansion unit) and C (9 VDC expansion power).