PS Engineering
PMA7000BT Series Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-780-0204
Page 2-7
May 2015
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 top connector harness can be custom made by PS Engineering, Inc. Simply call the factory and
obtain a wire harness work-sheet. The harness will be made to your specifications and fully functionally
tested. All hardware is included.
2.5.14.1 Alternate Intercom Mode (Bottom connector Pin 14
If an external switch is installed between pin 14 of the bottom connector and ground, the PMA7000BT can
be placed into “Alternate Intercom Mode.” In this mode, when the ICS is in “ALL” mode, the passengers
will not hear aircraft radio. In addition, the
passengers’
microphones are not heard by the crew when the
radios are active.
Front panel AUX switch can control Alternate Intercom Mode, by connecting J1 pin 14 to J2 pin A.
2.5.15 Entertainment Input
The PMA7000BT has two INDEPENDENT music inputs. Entertainment input number 1 is 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.
Entertainment 1 and 2 must be connected together in order for all positions to hear the same music source.
We recommend installing a DPDT switch to allow isolation of the music sources if desired.
16
15
T
Ent. #2 Input
14
R
13
Alternate Music Interconnect
Ent. #1 Input
N O T E : U s e t h e l o w l e v e l o u t p u t o f a n y a d d i t i o n a l e n t e r t a i n m e n t d e v i c e t o c o n n e c t t o
t h e a u d i o p a n e l . M a x i m u m s i g n a l l e v e l i s 2 V A C p -p . D O N O T u s e a s p e a k e r - l e v e l
o u t p u t , t h i s wi l l c a u s e i n t e r n a l d a m a g e i n t h e a u d i o p a n e l .
2.5.15.1.1 Entertainment muting
The PMA7000BT-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 can cause undesired interfer-
ence with other aircraft systems. Before takeoff, operate the entertainment devices 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.
2.5.15.1.2 Entertainment 2 Mute (Pin V)