PS Engineering
PMA5000EX Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-550-0100
Page 1-1
Rev. 3, Dec. 2015
Section I – GENERAL INFORMATION
1.1
INTRODUCTION
The PMA5000EX is designed to provide the basic audio control and intercom features most desire for the
Experimental / Light Sport Aircraft owner/pilot. Features like cellular telephone interface, music input with
custom muting schemes, and PS Engineering’s legendary IntelliVox® make this the perfect unit for many
light aircraft.
For use in Experimental/Non-certified aircraft ONLY
This unit is
NOT INTENDED FOR INSTALLATION IN CERTIFIED AIRCRAFT
Before installing and/or using this product, please read this manual completely. This will ensure that you
will take full advantage of all the advanced features in the PMA5000EX.
1.2
SCOPE
This manual provides detailed installation and operation instructions for the PS Engineering PMA5000EX-
series of Audio Selector Panel/Intercom Systems. This includes the following units:
Model
Description
Part Number
PMA5000EX
Stereo Audio Selector Panel with 4-place IntelliVox® Stereo
Intercom and utility jack.
050-550-0200
1.3
EQUIPMENT DESCRIPTION
The PMA5000EX is a state-of-the-art audio isolation amplifier and audio selector that contains a 4-place
automatic voice activated (VOX) intercom system. It can switch two transceivers (Com 1, Com 2) and five
navigation receivers (Nav 1, Nav 2, AUX 1, AUX 2 and DME). Pushbuttons select the receiver audio
source provided to the headphones (DME is paired with AUX 2).
A full duplex TEL mode allows the PMA5000EX to act as an audio interface between aircraft headphone
and microphones and specific aircraft approved (FAA/FCC) cellular telephone equipment, through the
front mounted jack.
Warning
: Use of non-aviation approved cellular telephone equipment may be prohibited by regulation.
PS Engineering is not responsible for unauthorized airborne use of cellular telephones.
For airborne use, the PMA5000EX must be interfaced with an approved system.
There are five unswitched inputs, available for traffic or EGPWS, autopilot disconnect, and/or radar altime-
ter warning, with the fifth unswitched input through a front-mounted utility jack, when configured to act as
a fifth unswitched input.
Pushbutton switches select one of the communication transceivers for the pilot and copilot position, and
allows radio transmission. In "Split Mode,” the PMA5000EX has the ability to allow the pilot to transmit
on Com 1 while the copilot can transmit on Com 2. A fail-safe mode connects the pilot headphone and mi-
crophone to COM 1 if power is removed for any reason, or if the power switch is placed in the Off (Fail-
safe) position. Unswitched input #1 is also provided to the pilot headphone in fail-safe
A four-station voice activated (VOX) intercom is included in the PMA5000EX. This system has PS Engi-
neering’s patented
IntelliVox®
circuitry that eliminates manual adjustments. The intercom system incorpo-
rates pilot isolate, all and crew modes, two independent stereo music inputs with "SoftMute™". Intercom
volume control is through two concentric front panel knobs and a pushbutton intercom mode switch. The
small volume knob controls the intercom level for the pilot and copilot, while the large knob controls the
passenger intercom volume. Intercom squelch is automatic.