PS Engineering PMA7000CD Installation Manual

9800 Martel Road

Lenoir City, TN 37772

www.ps-engineering.com

PMA7000MS-CD Audio Panel with

Compact Disc Option

and

PCD7100-R Remote Disc (CD and/or MP3) Player

Document P/N 200-790-0010

Rev. 10, September 2005

Patented the following; No. 5,903,277 6,160,496 and 6,493,450

FAA-Approved TSO C50c, C35d

JAA-Approved JTSO C50c, 2C35d

Audio Selector Panel with Marker Beacon Receiver

High-fidelity Stereo Intercom with Integral Compact Disc

System Installation and Operation Manual

Warranty is not valid unless this product is installed by an Authorized

PS Engineering dealer or a PS Engineering harness is purchased.

PS Engineering, Inc. 2005©

Any reproduction or retransmittal of this publication, or any portion thereof, without the expressed written permission of PS
Engineering, Inc. is strictly prohibited. For further information contact the Publications Manager at PS Engineering, Inc., 9800
Martel Road, Lenoir City, TN 37772. Phone [phone], email [e-mail].

Copyright Notice

Table of Contents

SECTION I GENERAL INFORMATION......................................................................................1-1

1.1 INTRODUCTION.........................................................................................................................1-1

1.2 SCOPE............................................................................................................................................ 1-1

1.3 EQUIPMENT DESCRIPTION....................................................................................................1-1

1.4 APPROVAL BASIS -.................................................................................................................... 1-2

1.5 SPECIFICATIONS.......................................................................................................................1-3

1.6 EQUIPMENT SUPPLIED............................................................................................................1-4

1.7 EQUIPMENT REQUIRED BUT NOT SUPPLIED................................................................... 1-4

1.8 LICENSE REQUIREMENTS......................................................................................................1-5

SECTION II - INSTALLATION......................................................................................................2-1

2.1 GENERAL INFORMATION....................................................................................................... 2-1

2.1.1 SCOPE ...........................................................................................................................2-1

2.1.2 CERTIFICATION REQUIREMENTS .................................................................................... 2-1

2.2 UNPACKING AND PRELIMINARY INSPECTION ................................................................................2-1

2.3 EQUIPMENT INSTALLATION PROCEDURES .................................................................................... 2-1

2.3.1 COOLING REQUIREMENTS .............................................................................................. 2-1

2.3.2 MOUNTING REQUIREMENTS........................................................................................... 2-1

2.3.3 AUDIO PANEL MOUNTING RACK INSTALLATION .......................................................... 2-2

2.3.4 REMOTE UNIT MOUNTING RACK INSTALLATION .......................................................... 2-2

2.3.5 AUDIO PANEL TRAY AND CONNECTOR ASSEMBLY ....................................................... 2-2

2.4 REMOTE UNIT CONNECTOR........................................................................................................... 2-3

2.5 CABLE HARNESS WIRING...............................................................................................................2-3

2.5.1 NOISE ............................................................................................................................. 2-3

2.5.2 EXISTING KMA-24 INSTALLATION................................................................................ 2-4

2.5.3 EXISTING PMA6000 INSTALLATIONS ............................................................................ 2-4

2.5.4 POWER............................................................................................................................ 2-4

2.5.5 COMMUNICATIONS PUSH-TO-TALK ............................................................................... 2-4

2.5.6 AUDIO PANEL INTERFACE .............................................................................................. 2-5

2.5.7 COM 3 DUPLEX (TEL) AND CELL PHONE FUNCTION..................................................... 2-5

2.5.8 TRANSMIT INTERLOCK ................................................................................................... 2-5

2.5.9 "SWAP" MODE................................................................................................................ 2-6

2.5.10 BACKLIGHTING ............................................................................................................ 2-6

2.5.11 UNSWITCHED INPUTS ................................................................................................... 2-6

2.5.12 PA MUTE (J1, PIN 18) .................................................................................................. 2-6

2.5.13 PUBLIC ADDRESS FUNCTION (J2, PIN 18) .................................................................... 2-6

2.5.14 CONTROL OUTPUT (J2, PIN A) ..................................................................................... 2-6

2.5.15 INTERCOM WIRING ....................................................................................................... 2-6

2.5.16 REMOTE CD WIRING .................................................................................................... 2-7

2.5.17 PMA7000CD INTERCOM EXPANSION (J2, PINS P, S, AND C)...................................... 2-7

2.5.18 PLAYBACK BUTTON INSTALLATION (J2, PIN 19- OPTIONS 1, ONLY)......................... 2-8

2.6 MARKER BEACON INSTALLATION..................................................................................................2-8

2.6.1 MARKER ANTENNA INSTALLATION ............................................................................... 2-8

2.6.2 EXTERNAL MARKER LIGHTS (7000MS-CD) ................................................................. 2-8

2.6.3 MIDDLE MARKER SENSE (7000MS-CD) ....................................................................... 2-8

2.6.4 MARKER AUDIO INPUT (7000S-CD) .............................................................................. 2-8

2.7 ADJUSTMENTS.................................................................................................................................2-8

2.8 COMMUNICATIONS ANTENNA INSTALLATION NOTES...................................................................2-9

2.8.1 HOOK SWITCHES ............................................................................................................ 2-9

2.9 PMA7000CD PIN ASSIGNMENTS ................................................................................................. 2-10

2.10 POST INSTALLATION CHECKOUT............................................................................................... 2-11

2.11 UNIT INSTALLATION................................................................................................................... 2-11

PMA7000CD- Series Audio Selector Panel and Intercom System

Installation and Operator’s Manual

PS Engineering

2.11.1 REQUIRED TEST EQUIPMENT ..................................................................................... 2-11

2.11.2 OPERATIONAL CHECKOUT ......................................................................................... 2-11

2.11.3 RECEIVER SENSITIVITY .............................................................................................. 2-12

2.12 INTERNAL RECORDER CHECKOUT (OPTIONAL)........................................................................ 2-12

2.13 FINAL INSPECTION......................................................................................................................2-12

SECTION III OPERATION ............................................................................................................. 3-1

3.1 SCOPE............................................................................................................................................ 3-1

3.2 POWER SWITCH (EMG-FAIL SAFE OPERATION).......................................................................... 3-1

3.3 MICROPHONE (XMT) SELECTION (ALL MODELS)........................................................................3-1

3.3.1 SWAP MODE (SWITCH FROM COM 1 TO COM 2 REMOTELY) ......................................... 3-2

3.4 AUDIO SELECTOR (ALL MODELS) ..................................................................................................3-2

3.4.1 SPEAKER AMPLIFIER ...................................................................................................... 3-2

3.4.2 KEY “CLICK”.................................................................................................................. 3-3

3.5 SPLIT MODE.................................................................................................................................... 3-3

3.5.1 SPLIT MODE ICS ............................................................................................................ 3-3

3.6 INTERCOM OPERATION ..................................................................................................................3-3

3.6.1 INTELLIVOX® VOX-SQUELCH ....................................................................................... 3-3

3.6.2 INTERCOM VOLUME CONTROL ...................................................................................... 3-4

3.6.3 INTERCOM MODES ......................................................................................................... 3-4

3.7 TELEPHONE MODE .........................................................................................................................3-6

3.8 COMPACT DISC OPERATION ..........................................................................................................3-7

3.9 MARKER BEACON...........................................................................................................................3-7

3.10 INTERNAL RECORDER SYSTEM (OPTIONAL)...............................................................................3-8

3.10.1 OPERATION .................................................................................................................. 3-8

SECTION IV- WARRANTY AND SERVICE................................................................................ 4-1

4.1 WARRANTY .....................................................................................................................................4-1

4.2 FACTORY SERVICE..........................................................................................................................4-1

APPENDIX A – MP3 CREATION...........................................................................................A

5.1 CREATING MP3S FROM AN AUDIO CD .............................................................................................A

APPENDIX B – PMA 7000CD INSTALLATION DRAWING....................................B

APPENDIX C BOTTOM CONNECTOR INTERCONNECT .........................................................C

APPENDIX D TOP CONNECTOR INTERCONNECT...................................................................D

APPENDIX E- INSTRUCTIONS FOR FAA FORM 337 AND CONTINUING

AIRWORTHINESS ...................................................................................................................................E

9.1 INSTRUCTIONS FOR FAA FORM 337, AUDIO PANELS ......................................................................E

9.2 INSTRUCTIONS FOR CONTINUING AIRWORTHINESS, AUDIO SYSTEM..............................................E

APPENDIX F RTCA DO160C (EUROCAE ED-14) ENVIRONMENTAL QUAL FORM ...............F

CROSS REFERENCE FOR BENDIX/KING KMA26........................................................................

CROSS-REFERENCE FOR GMA340................................................................................................C

Revision History

Rev By Date Change

8 GLP Feb 2004 Changed IntelliPAX interface for consistency
9 GLP March

2005

10 GLP Sept 2005 Clarified CB size for PCD7100-R

Added list of test equipment in section 2.11

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PMA7000CD- Series Audio Selector Panel and Intercom System

Installation and Operator’s Manual

PS Engineering

Section I GENERAL INFORMATION

1.1 INTRODUCTION

The PMA7000 with CD option represents the next step in cockpit audio control and intercommunications

utility. Using proprietary IntelliVox® design, this unit eliminates the requirements for intercom squelch

adjustments. The unit is designed for outstanding ergonomics and visually defined mode annunciation and
selection. By providing control for a remote compact disc (CD) player, the system simplifies installation
and operation of entertainment sources for the cockpit and crew.

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 PMA7000CD and PCD7100-R Remote Player.

1.2 SCOPE

This manual provides detailed installation and operation instructions for the PS Engineering PMA7000­series of Audio Selector Panel/Intercom Systems. This includes the following units:

Description Part Number

Model
PMA7000S-CD MP3 Stereo Audio Selector Panel w Disc controls 7000S-CD
PMA7000MS CD MP3 Stereo Audio Panel as above with Marker 7000MS-CD
Option 1 added to any 7000CD Intercom Recorder System (IRS) Opt 1
PCD7100-R Remotely Controlled Compact Disc/MP3 player 11959
Option 3 added to any system Black bezel (no silver trim) Opt 3

Where the functions are identical to all units, it will be referred to herein as a PMA7000CD. Otherwise, the
applicable units will be specified.

1.3 EQUIPMENT DESCRIPTION

The PMA7000-series is a state of the art audio isolation amplifier and audio selector that contains an auto­matic voice activated (VOX) intercom system. It can switch up to three transceivers (Com 1, Com 2 and
Com 3) and six receivers (Nav 1, Nav 2, ADF, DME, MKR and AUX).

A duplex COM 3 mode (selectable at installation) allows the PMA7000 to act as an audio interface be­tween aircraft headphone and microphones and specific aircraft approved

(FAA/FCC) cellular telephone

equipment.

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 PMA7000CD must be interfaced with an approved system.

There are two unswitched inputs, for autopilot disconnect, and/or radar altimeter warning. Push buttons
select the receiver audio source provided to the headphones. A SPR button allows the user to listen to the
receiver(s) selected on the cabin speaker. Except for the unswitched inputs, all speaker audio is muted dur­ing transmit.

Push button switches selects one of the communication transceivers for the pilot and copilot position, and
allows radio transmission. In "Split Mode" the PMA7000CD has the ability to allow the pilot and copilot to
operate different transceivers independently. The Com 3/TEL mode (selected at installation) allows the
pilot to use the audio panel for duplex operation, such as with aviation-specific cellular telephones. Exter­nal switches permit telephone operation for the copilot and passengers.

A fail-safe mode connects the pilot headphone and microphone to COM 1 if power is removed for any
reason, or if the power switch is placed in the Off (Fail-safe) position.

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PS Engineering

A six-station voice activated (VOX) intercom is included in the PMA7000CD. This system has PS Engi-

neering’s exclusive IntelliVox® circuitry that eliminates manual adjustments. The system contains six sepa-

rate VOX mic circuits, and only opens the microphone channel in use.

The intercom system incorporates pilot isolate and crew modes, two stereo music inputs with "Soft Mute,"
and flashing LED indicators for transmit indications. Intercom control is through front panel-mounted
knob and 3 position mode switch. A concentric volume controls the music level, and intercom level for the
pilot and copilot. Passenger headphone volume is factory set, and adjusted in flight with headset-mounted
volume controls. Passenger volume control is further adjustable through screwdriver access in the top of
the unit. Intercom squelch is automatic.

An optional 3-light Marker Beacon receiver is integrated in the PMA7000CD. This provides the necessary
Marker Beacon lights and audio indications necessary for an Instrument Landing System (ILS) approach.

1.4 APPROVAL BASIS -

TSO Approval.

The PMA7000-series Audio Selector Panels are FAA approved under TSO C50c (Audio Amplifiers) and
TSO C35d (Marker Beacon Receivers). ). In addition, they are approved by the Joint Airworthiness Au­thorities under JTSO C50C and JAR-TSO 2C35d.

All systems comply with relevant portions of EUROCAE RTCA MPS WG No. 7/70, DO-143 and (Marker

Beacon Receivers), ED-14C/DO-160C (Environmental Conditions and Test Procedures for Airborne
Equipment), ED12B/DO-178B (Software Considerations for Airborne Equipment) and ED- 18/DO-214
(Audio Systems Characteristics and Minimum Operational Performance Standards for Aircraft Audio Sys­tems).

The PCD7100-R is FAA TSO approved under TSO C50c and JAA approved under JAR TSO C50c.

Operation is subject to the following conditions:
This device may not cause harmful interference.
This device must accept any interference received, including interference that may cause undesired opera­tion.

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PS Engineering

1.5 SPECIFICATIONS

TSO COMPLIANCE

Marker Beacon: C35d, Class A
Audio Selector/Intercom: C50c, Class A

APPLICABLE DOCUMENTS: RTCA/DO-214 RTCA/DO-143 RTCA/DO-160C

RTCA/DO-178B

ENVIRONMENTAL Qualifications:

A1D1/CA(MN)XXXXXXBBBBTBKXX

Operating Temperature Range: -15º C to 55ºC
Altitude: Up to 50,000 feet in an non-pressurized area

DIMENSIONS: Height: 1.3 in. (3.3 cm) Width: 6.25 in. (16.9 cm)

Depth: 6.8 in. (17.3 cm)

WEIGHT (With Rack & Connectors): 1.5 lb. (0.54 kg)

POWER REQUIREMENTS (Including Internal Lighting):

Voltage: 11 to 33 VDC
Maximum Current: 2.5 Amp (Externally protected by a 3A pull-type

breaker)

Audio Selector Specifications

Audio selector panel input impedance:

510 Ω

Input Isolation: -60 dB (min.)
Speaker Muting: -60 dB (min.)
Speaker Output (into 4 Ω) with no clipping

14 VDC:
28 VDC:

3 Watts (min.)
10 Watts (min.)

Receiver Inputs: 9 (Com 1, Com 2, Com 3, Nav 1, Nav 2, ADF,

DME, MKR, AUX)

Unswitched Inputs: 4
Transmitter Selections: 6 (Com 1, Com 2, Com 3

Com1/2, Com1/3, Duplex Telephone)

Speaker Impedance:
Headphone Impedance:

4 Ω
150 – 1000 Ω

Headphone Output: 38 mW each headset, no clipping <1% THD
Microphone Impedance:

150 - 600 Ω

Intercom Specifications

Intercom Positions: 6 places (with individual IntelliVox® circuits)
Music Inputs: 2 (Stereo)
Music Muting: >-30 dB "Soft Mute" when Com or intercom active.
Distortion:
Mic Freq. Response, 3 dB: 300 Hz - 6000 Hz
Music Freq. Response, 3 dB: 20 Hz - 18kHz

MARKER BEACON RECEIVER:PMA7000MS-CD only

Frequency: 75 MHz Crystal Controlled
Sensitivity:

Low:
High:

Selectivity: -6 dB at ±10 kHz

External Lamp Output: 7.5 (±4 VDC unloaded, at maximum brightness) VDC

MM Sense: Active high (4.5 ± 1.0VDC)

<1% THD @ 38 mW into 150Ω

Capable of: (preset at factory for field application)
1000 µVolts (Hard) (360 to 570 µV soft)
200 µVolts (Hard) (130 to 200 µV soft)

-40 dB at ±120 kHz

positive when active, max. current 125 mA

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PS Engineering

Compact Disc Player PCD7100-R, P/N 11959

TSO Compliance
Environmental Compliance

C50c, Class A
B1CABSRXXXXXXABBBBTMXXE2

Operating Temperature Range:: -15º C to 55ºC
Altitude: Up to 25,000 feet in a non-pressurized area

DIMENSIONS: Height: 1.5 in. (3.8 cm) Width: 6.25 in. (15.9 cm)

Depth: 7.8 in. (19.8 cm)

WEIGHT (With Rack & Connectors): 1.9 lb. (.54 kg)

1.6 EQUIPMENT SUPPLIED

1 ea. of the following units:

Model Description Part Number

PMA7000S-CD MP3 PMA7000S Audio Panel with Stereo Intercom for use with

PCD7100-R, Silver trim. NO MARKER beacon receiver.

PMA7000CD MP3 PMA7000CD Audio Panel with Marker Beacon and Stereo inter-

com for use with PCD7100-R. Silver trim ring.
Option 1 Adds 1-minute continuous-loop digital recorder
PCD7100-R Same as above, but with MP3 capability 11959
Option 3 Black bezel units (No silver trim)

7000S - Opt CD

7000MS – Opt CD

PMA7000CD Installation Kit: 250-007-3613

Description Quantity Part

PMA7000CD installation rack assembly 1 120-430-0420
Top Molex Connector Shell w/key, 44 pin, key 4/5 1 120-425-4402

Bottom Molex Connector Shell w/key, 44 pin, key 7/8 1 120-425-4400
Gold Plated Crimp Pins 88 425-001-0002
4 40 X 7/16 screw w/nylon patch 4 475-440-0007
Grounding bar 1 430-007-0001
6-32 X 3/4 pan head Phillips screw 2 475-632-0038
6-32 Nut Flat 2 475-632-0003
6-32 Lock Nut 2 475-632-0004
Cable Clamp 1 625-001-0002
#6-32 x ½” Flat head Phillips screw 6 475-632-0012
#6-32 Clip Nut 6 475-630-0002
Parts identification sheet 1 002-250-7028

PCD7100-R Remote Player (11959) Installation Kit

Part Number Description 250-795-0005

430-795-0020 Tray 1
425-015-2052 DB 15 Pin Connector Shell 1
425-020-5090 Crimp Sockets 15
425-015-0003 Connector Hood 1
475-632-0012 #6-32 x ½” Phil screw. 4
475-630-0002 6-32 Clip Nut 4
475-013-0001 #4-40 Kep-Nut 2
470-440-0018 #4-40 Screw 2

Number

1.7 EQUIPMENT REQUIRED BUT NOT SUPPLIED

a) Circuit Breaker: 1 ea; 3 amp PULL TYPE REQUIRED for PMA7000CD

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PMA7000CD- Series Audio Selector Panel and Intercom System

Installation and Operator’s Manual

b) Circuit Breaker: 1 ea; 2 amp PULL TYPE REQUIRED for PCD7100-R
c) Speaker, 4 Ω
d) Headphone Jacks (Stereo, as Required)
e) Microphone Jacks (as Required)
f) Headphones, 150 Ω (Stereo), up to 6 as required
g) Microphones, up to 6 as required
h) Marker Antenna (75 MHz, VSWR <1:1.5, and appropriate for the airspeed)

PS Engineering

i) Interconnect Wiring

1.8 LICENSE REQUIREMENTS

None

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PMA7000CD- Series Audio Selector Panel and Intercom System

Installation and Operator’s Manual

PS Engineering

Section II - Installation

2.1 GENERAL INFORMATION

2.1.1 SCOPE

This section provides detailed installation and interconnection instructions for the PS Engineering
PMA7000CD-Series Audio Selector Panel/Intercom/MP3 Compact Disc System with internal Marker Bea­con.

With the exception of the internal marker beacon receiver, the PMA7000S-CD, and PMA7000MS-CD are
identical. All units will be identified hereafter as the PMA7000CD, where the information applies to all.

Please read this manual carefully before beginning any installation to prevent damage and post-installation
problems. Installation of this equipment requires special tools and knowledge.

2.1.2 Certification Requirements

NOTE: The PMA7000CD requires specialized knowledge and tools for an effective installation. An ap­propriately rated Certified Aircraft Repair Station must install this equipment in accordance with applica-

ble regulations. PS Engineering, Incorporated warranty is not valid unless the equipment is installed by an
authorized PS Engineering, Incorporated dealer.
Failure to follow any of the installation instructions, or installation by a non-certified individual or agency

will void the warranty, and may result in an unairworthy installation.

2.2 Unpacking and Preliminary Inspection

Use care when unpacking the equipment. Inspect the units and parts supplied for visible signs of shipping
damage. Examine the unit for loose or broken buttons, bent knobs, etc. Verify the correct quantity of com­ponents supplied with the list in Section 1.6 (B). If any claim is to be made, save the shipping material and
contact the freight carrier. Do NOT return units damaged in shipping to PS Engineering. If the unit or ac­cessories show any sign of external shipping damage, contact PS Engineering to arrange for a replacement.
Under no circumstances attempt to install a damaged unit in an aircraft. Equipment returned to PS Engi­neering for any other reason should be shipped in the original PS Engineering packaging, or other UPS
approved packaging.

2.3 Equipment Installation Procedures

2.3.1 Cooling Requirements

Forced air-cooling of the PMA7000CD or remote player is not required. However the units should be kept
away from heat producing sources (i.e. defrost or heater ducts, dropping resistors, heat producing avionics)
without adequate cooling air provided.

2.3.2 Mounting Requirements

The PMA7000CD must be rigidly mounted to the instrument panel of the aircraft structure and within view
and reach of the pilot position(s). Installation must comply with FAA Advisory Circular AC 43.13-2A. The
unit may be mounted in any area where adequate clearance for the unit and associated wiring bundle exist.

The PCD7100-R Remote CD Player may be located in any convenient location for access to the disc slot.
However, it should be mounted to keep the interconnecting bundle within approximately six feet (2 me-

ters). The unit must be installed within ±30° of horizontal along the pitch axis, and ±10° of horizontal along
the roll axis in level flight.

Avoid installing the units close to high current devices or systems with high-voltage pulse type outputs,
such as DME or transponders. Avoid running the interconnecting bundles near any high current wires.

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PS Engineering

2.3.3 Audio Panel Mounting Rack Installation

Remove the unit from the mounting tray by unscrewing the 3/32" hex-head screw that is in the center of
the unit. Use caution to avoid hitting the photo-detector lens. Carefully slide the unit free of the tray. Set
the unit aside in a safe location until needed. Install the tray using six clip nuts (475-630-0002), and six
FHP 6-32 x ½" screws (475-632-0012). The audio selector panel must be supported at front and rear of the
mounting tray.

2.3.4 Remote Unit Mounting Rack Installation

Remove the unit from the mounting tray by unscrewing the 3/32" hex-head screw that is in the left side of
the unit. Carefully slide the unit free of the tray. Set the unit aside in a safe location until needed. Install
the tray using six clip nuts (475-630-0002), and six FHP 6-32 x ½" screws (475-632-0012). The CD-player
must be supported at front and rear of the mounting tray.

2.3.5 Audio Panel Tray and Connector Assembly

The unit connectors mate directly with the circuit boards in the PMA7000CD. The connectors are a Molex
crimp-type, and require the use of a Molex hand crimp tool, EDP P/N 11-01-0203, CR6115B (or equiv.).
The connectors are mounted to the unit tray with #4-40 screws (475-440-0007), from the inside of the tray.
Ensure that proper strain relief and chafing precautions are made during wiring and installation, using the
cable clamp (625-001-0002). Secure the ground bar (430-630-0002), if desired using, #6-32 nuts (475-632-

0003) and #6-32 lock nuts (475-632-0004).

Figure 2-1 Audio Panel Tray Assembly Drawing

120-430-0420

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PMA7000CD- Series Audio Selector Panel and Intercom System

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2.4 Remote Unit Connector

The remote unit uses a 15-pin Sub-D solder type connector on the player. This attaches to the mounting
tray as shown. The connector is passed into the tray through the notches provided in the opening.

PS Engineering

470-440-0018 (2x)

475-013-0001 (2x)

425-016-0001

430-795-0020

Notches for connector

2.5 Cable Harness Wiring

Referring to the appropriate Appendix, assemble a wiring harness as required for the installation. All wires
must be MIL-SPEC in accordance with current regulations. Two- and three-conductor shielded wire must
be used where indicated, and be MIL-C-27500 or equivalent specification. Proper stripping, shielding and
soldering technique must be used at all times. It is imperative that correct wire be used.

The 6-conductor cable for the remote CD is available from PS Engineering as part number 800-022-0609.

Refer to FAA Advisory Circular 43.13-2A for more information. Failure to use correct techniques may
result in improper operation, electrical noise or unit failure. Damage caused by improper installation will
void the PS Engineering warranty.

NOTE: PS Engineering can make a custom wiring harness for the intercom and CD player portion. Call 1­800-ICS-AERO or see www.ps-engineering.com

2.5.1 Noise

Due to the variety and the high power of radio equipment often found in today's general aviation aircraft,
there is a potential for both radiated and conducted noise interference.

The PMA7000CD power supply is specifically designed to reduce conducted electrical noise on the aircraft
power bus by at least 50dB. Although this is a large amount of attenuation, it may not eliminate all noise,
particularly if the amplitude of noise is very high. There must be at least 13.8 VDC present at the bottom
connector, pin 20, of the PMA7000CD for the power supply to work in its designed regulation. Otherwise,
it cannot adequately attenuate power line noise. Shielding can reduce or prevent radiated noise (i.e., bea­con, electric gyros, switching power supplies, etc.) However, installation combinations can occur where
interference is possible. The PMA7000CD was designed in a RFI hardened chassis and has internal Elec­tromagnetic Interference (EMI) filters on all inputs and outputs.

Ground loop noise occurs when there are two or more ground paths for the same signal (i.e., airframe and
ground return wire). Large cyclic loads such as strobes, inverters, etc., can inject noise signals onto the

for details.

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PS Engineering

airframe that are detected by the audio system. Follow the wiring diagram very carefully to help ensure a
minimum of ground loop potential. Use only Mil Spec shielded wires (MIL-C-275000, or better).Under no
circumstances combine a microphone and headphone wiring into the same shielded bundle. Always use a
2- or 3-conductor, shield wire as shown on the installation wiring diagram.

Radiated signals can be a factor when low level microphone signals are "bundled" with current carrying
power wires. Keep these cables physically separated. It is very important that you use insulated washers to

isolate the ground return path from the airframe to all headphone and microphone jacks.

Adding a high-performance audio control system, particularly in conjunction with high-performance active
noise canceling headsets, cannot improve on older avionics that were designed for cabin-speaker use. PS
Engineering makes no claim that the audio panel will provide a noise-free audio quality under all installa­tion conditions, particularly with older avionics.

2.5.2 Existing KMA-24 Installation

If the installation replaces a KMA-24 (series -01, -02 or -03), the existing 44 pin connector can be used for
the bottom connector of the PMA7000CD tray as is, providing it is properly installed and wired. No other
changes are required except for external marker lights (see Section 3.7.2 for details). The "key" in the ex­isting connector must be located between pins 7 and 8. This connector will be used in the bottom connector
position. (See Appendix for complete wiring harness details.)

The existing ground bus may be reused for radio shield connections, if it was constructed so it can be relo­cated to the PMA7000CD tray.

2.5.3 Existing PMA6000 installations

In 28-Volt aircraft, the dropping resistor may be removed, however, the 2 Amp breaker should be changed
to 3 Amp. If the old unit is stereo (PMA6000S or PMA6000MS), no rewiring is necessary except to add
additional features.

2.5.3.1 Stereo PMA7000CD installations into monaural PMA6000, PMA6000M.

Installations replacing PMA6000 or PMA6000M require re-wiring of the top connector to accommodate
the stereo configuration. See appendixes for detailed interconnect information.

2.5.4 Power

The PMA7000CD-Series are compatible with both 14 and 28 Volt DC systems. A two (2) Amp circuit
breaker is required for 14 VDC installations, and a three (3) Amp breaker for 28 VDC aircraft. Power and
ground wires must be a twisted

#18 AWG pair. Connect airframe power ground to J1 (bottom connector)

Pin Z only. No dropping resistors are required.

2.5.5 Communications Push-to-Talk

An important part of the installation is the PTT (Push-To-Talk) switches that allow the use of your aircraft
communications radio for transmissions. There are three typical configurations that can be used. Select the
case that best fits the installation. Only the person who presses their PTT switch will be heard over the ra­dio. If the pilot and copilot both use the PTT, the only pilot position has access to the radio. The pilot posi­tion will have PTT control regardless of the mic selector switch or copilot PTT when the PMA7000CD is

OFF/EMG mode.

in the

CASE I: PTT is built into both pilot and copilot yokes.
CASE II: PTT is in pilot yoke only. This configuration requires a modified external PTT switch plugged

into the copilot's microphone jack. (See Appendix A). When the copilot's PTT is pressed, the intercom
switches the microphone audio from pilot to copilot mic.

CASE III: No built in PTT. This requires two built in PTTs to be installed, or modified external PTT

switches to be used. Modify external PTT as required. See Appendix A.

200-790-0010 Page 2-4 Revision 10, September 2005

PMA7000CD- Series Audio Selector Panel and Intercom System

Installation and Operator’s Manual

PS Engineering

2.5.6 Audio Panel interface

The PMA7000CD is designed to interface with standard aircraft avionics, and presents a 500Ω receiver
impedance. For best results, a twisted-shielded cable is recommended from the avionics audio source to the
audio panel, with the shield grounded at the audio panel end.

Some avionics do not provide a separate audio low, and may introduce additional electrical noise into the
system. For best results, connect the audio low from the audio panel to the radio ground, using one conduc­tor of the twisted-shielded cable.

2.5.6.1 Speaker Load

The PMA7000-series contains a speaker amplifier. Some units with internal speaker amplifiers, such as
the King Radio KX170-series, require a resistive load to prevent damage if their speaker amplifier is not
used. Connect the speaker output from the unit to the load input on the PMA7000CD (J1, pins 19 and L, 16
and M. The speaker load in 16 Ω, 3W.

2.5.7 Com 3 Duplex (TEL) and Cell phone Function

As installed in the standard configuration, the PMA7000CD Com 3 function operates conventionally.
Pushing the Com 3 Xmt button places the receive audio from Com 3 in the headset and applies the pilot or
copilot microphone to the Com 3 when the appropriate PTT is activated.

The COM 3 input is designed to be used for a third aviation transceiver, but is capable of interfacing to a

cellular telephone, including AirCell. Note: Not all cells phone are compatible. PS Engineering, Inc is

does not guarantee function or operation of cell phone inputs or outputs.

The COM 3 duplex mode can be enabled when J2, Pin J is connected to aircraft ground (either directly or
through a switch). In this mode, the COM 3 input and output is compatible with many cellular telephones
utilizing the hands-free headset interface. A 1/8" (using an adapter) or 3/32" jack can be installed on the
aircraft panel, which is interfaced with the PMA7000B as shown below. To connect the cellular telephone
to the jack wired in to COM 3, a patch cord is required. This patch cord is available from PS Engineering
under P/N 425-006-7026 (3/32" to 3/32"). A 1/8" to 3/32" adapter is available from Radio Shack P/N 274-

373.

7000B
Bottom Connector

J
K
1

Cellular Plug (typical)
Tip= Microphone out
Ring= Speaker audio
Base=Ground

Com 3 Audio

COM 3 Mic Input

Audio Lo

Cellular Phone
Interconnect

3/32" Cellular Jack

For Duplex (cell phone) operation
Pin J of top connector MUST BE GROUNDED
This is a typical interconnect
PS Engineering does not guarantee
compatability in all cases.

Unauthorized use of unapproved cellular telephone devices in aircraft is subject to FCC enforcement

action, which may include a $10,000 fine per incident. PS Engineering, Inc. does not endorse using

unapproved cellular telephone equipment in flight, and takes no responsibility for the user’s action.

2.5.8 Transmit Interlock

Some communications transceivers use a transmit-interlock system. To fully utilize the Split Mode feature,
this function must be disabled. Consult that manufacturer's installation manual.

200-790-0010 Page 2-5 Revision 10, September 2005