Honeywell Bendix/King KMA 30 User Manual

KMA 30

Audio Panel with Marker Beacon Receiver

High-fidelity Stereo Intercom

FAA- TSO C50c, C35d

EASA ETSO C50c, 2C35d

Patented under one or more of the following;

No. 4,941,187; 5,903,227; 6,160,496 and 6,493,450

Document P/N 200-890-5464 Rev. 1, Aug. 2012

Bendix/King, Inc. 2012 ©

Copyright Notice
Any reproduction or retransmittal of this publication, or any portion thereof, without the expressed written permission of Bendix/King,
Inc. is strictly prohibited. For further information contact the Publications Manager at Phone [phone].

Manufactured for Bendix/King, a division of Honeywell Int’l, Inc.

Albuquerque, NM 87113, USA

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.................................................................................................................... 1-2

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

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

1.8 OPTIONAL ITEMS................................................................................................................... 1-4

1.9 LICENSE REQUIREMENTS ................................................................................................... 1-4

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........................................................... 2-1

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

2.4 CABLE HARNESS WIRING ............................................................................................................ 2-2

2.4.1 ELECTRICAL NOISE...................................................................................................... 2-2

2.4.2 EXISTING GMA340 INSTALLATION .............................................................................. 2-3

2.4.3 POWER ........................................................................................................................ 2-3

2.4.4 AUDIO PANEL INTERFACE ............................................................................................ 2-3

2.4.5 TRANSMIT INTERLOCK................................................................................................. 2-3

2.4.6 BACKLIGHTING............................................................................................................ 2-4

2.4.7 UNSWITCHED INPUTS................................................................................................... 2-4

2.4.8 "SWAP" MODE............................................................................................................. 2-4

2.4.9 TEL (DUPLEX) FUNCTION FOR CELL PHONES .............................................................. 2-5

2.4.10 PUBLIC ADDRESS MODE ............................................................................................ 2-5

2.4.11 PA MUTE (J2, PIN 12)................................................................................................ 2-7

2.4.12 MISCELLANEOUS LOGIC OUTPUT (J2, PIN 18) ............................................................ 2-7

2.4.13 AUDIO ACTIVE OUTPUT ............................................................................................. 2-7

2.5 INTERCOM WIRING ...................................................................................................................... 2-7

2.5.1 ENTERTAINMENT INPUTS ............................................................................................. 2-7

2.5.2 ENTERTAINMENT MUTING............................................................................................ 2-7

2.5.3 CONFIGURING MUSIC INPUT WITH FUNCTION KEYS ..................................................... 2-8

2.5.4 PLAYBACK BUTTON INSTALLATION.............................................................................. 2-8

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

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

2.6.2 EXTERNAL MARKER LIGHTS........................................................................................ 2-9

2.6.3 MIDDLE MARKER SENSE ............................................................................................. 2-9

2.7 ADJUSTMENTS ............................................................................................................................. 2-9

2.8 COMMUNICATIONS ANTENNA INSTALLATION NOTES ................................................................ 2-10

2.9 KMA 30 PIN ASSIGNMENTS ....................................................................................................... 2-11

2.10 WIRING CHECKOUT ................................................................................................................ 2-12

2.11 UNIT INSTALLATION................................................................................................................ 2-12

2.12 OPERATIONAL CHECKOUT ...................................................................................................... 2-12

Bendix/King by Honeywell

KMA 30 Audio Panel and Intercom System

Installation and Operator’s Manual

200-890-5464 Page ii Rev. 1, Aug. 2012

2.12.1 REQUIRED TEST EQUIPMENT ................................................................................... 2-12

2.12.2 AUDIO PANEL TEST ................................................................................................. 2-12

2.12.3 MARKER CHECKOUT ............................................................................................... 2-13

2.12.4 TEL CHECKOUT ...................................................................................................... 2-13

2.12.5 INTERNAL RECORDER CHECKOUT............................................................................ 2-13

2.12.6 FUNCTION BUTTON CHECKOUT ............................................................................... 2-13

2.13 FINAL INSPECTION................................................................................................................... 2-13

Section III OPERATION.......................................................................................3-1

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

3.2 COMMUNICATIONS TRANSMIT (XMT) SELECTION (2) ................................................................ 3-1

3.3 AUDIO SELECTOR (4)................................................................................................................... 3-2

3.4 TELEPHONE (TEL) (9)................................................................................................................. 3-2

3.4.1 CELL PHONE SIDETONE................................................................................................ 3-3

3.5 SPEAKER AMPLIFIER (5).............................................................................................................. 3-3

3.6 MARKER BEACON OPERATION (10)............................................................................................. 3-3

3.7 INTERCOM OPERATION ............................................................................................................... 3-4

3.7.1 INTELLIVOX® VOX-SQUELCH...................................................................................... 3-4

3.7.2 INTERCOM VOLUME CONTROL (7) ............................................................................... 3-4

3.7.3 INTERCOM MODES (8) ................................................................................................. 3-5

3.8 MUSIC AND MUSIC MUTING (6) ................................................................................................... 3-5

3.8.1 MUSIC IN PILOT ISO MODE .......................................................................................... 3-6

3.9 TELEPHONE MODE (9)................................................................................................................. 3-6

3.9.1 CELLULAR TELEPHONE SIDETONE ................................................................................ 3-7

3.10 UTILITY JACK ........................................................................................................................... 3-7

3.10.1 CELLULAR PHONE ...................................................................................................... 3-7

3.10.2 AUDIO ADVISORY INPUT............................................................................................ 3-7

3.10.3 MUSIC INPUT............................................................................................................. 3-7

3.11 SMART FUNCTION KEYS (SFK) ................................................................................................. 3-8

3.11.1 “INTERCOM” ALTERNATE INTERCOM FUNCTION (A) .................................................... 3-8

3.11.2 MONITOR (B)............................................................................................................. 3-9

3.11.3 MUSIC (C) ................................................................................................................. 3-9

3.11.4 MUSIC 1 VOLUME.................................................................................................... 3-10

3.11.5 POWER ON ANNOUNCEMENT.................................................................................... 3-11

3.12 BLUETOOTH® INTERFACE ....................................................................................................... 3-11

3.12.1 PAIRING AND UNPAIRING BLUETOOTH DEVICES........................................................ 3-11

3.13 INTERNAL RECORDER AND PLAYBACK..................................................................................... 3-11

Section IV – Warranty ...........................................................................................4-1

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

Appendix A – KMA 30 Installation Drawings ........................................................ A

Appendix B – J1 Connector Interconnect ............................................................... B

Appendix C – J2 Connector Interconnect............................................................... C

Appendix D – Instructions for FAA Form 337 and continuing airworthiness....... D

8.1 INSTRUCTIONS FOR FAA FORM 337, AUDIO PANELS......................................................................D

8.2 INSTRUCTIONS FOR CONTINUING AIRWORTHINESS, AUDIO SYSTEM ..............................................D

Appendix E – RTCA DO160D Environmental Qualification Form............................ E

Rev Date Change
New July 2012 New release
1 Aug. 2012 Updated picture of panel for Playback feature

Bendix/King by Honeywell

KMA 30 Audio Panel and Intercom System

Installation and Operator’s Manual

200-890-5464 Page 1-1 Rev. 1, Aug. 2012

Section I – GENERAL INFORMATION

1.1 INTRODUCTION

The KMA 30 represents another evolutionary step in cockpit audio control and intercommunications util­ity. Using our patented IntelliVox® design, front panel utility jack, and pilot programmable configura­tions, this marks the next level of audio control. The unit is designed for outstanding ergonomics and
visually defined mode annunciation and selection.

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 KMA 30.

1.2 SCOPE

This manual provides detailed installation and operation instructions for the Bendix/King KMA 30-series
of Audio Selector Panel/Intercom Systems. This includes the following units:

Model Description Bendix/King

Part Number

PS Part Number

KMA 30 Stereo Audio Selector Panel with Marker Beacon, in-

cludes utility jack and Internal Recorder System

89000003-100 050-890-5464

1.3 EQUIPMENT DESCRIPTION

The KMA 30 is a state-of-the-art audio isolation amplifier and audio selector that contains an automatic
voice activated (VOX) intercom system and integral marker beacon receiver. It can switch two transceiv­ers (Com 1, Com 2) and six receivers (Nav 1, Nav 2, ADF, DME, MKR and AUX).

A full duplex TEL mode allows the KMA 30 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 FCC regulation.

Bendix/King is not responsible for unauthorized airborne use of cellular telephones.

For airborne use, the KMA 30 must be interfaced with an approved system.

There are five unswitched inputs, available for traffic or EGPWS, autopilot disconnect, and/or radar al­timeter warning, with the fifth unswitched input through a front-mounted utility jack, when configured to
act as a fifth unswitched input.

Pushbuttons 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. Unswitched inputs 1,3, and 4 are always presented to the aircraft speaker.
Unswitched input 2 will be presented to the speaker when the front panel SPR push button has been se­lected.

Pushbutton switches select one of the communication transceivers for the pilot and copilot position, and
allows radio transmission. In "Split Mode" the KMA 30 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 mi­crophone to COM 1 if power is removed for any reason, or if the power switch is placed in the Off (Fail­safe) position. Unswitched input #1 is also provided to the pilot headphone in fail-safe

A six-station voice activated (VOX) intercom is included in the KMA 30. This system has Bendix/King’s
patented IntelliVox® circuitry that eliminates manual adjustments. The intercom system incorporates 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

Bendix/King by Honeywell

KMA 30 Audio Panel and Intercom System

Installation and Operator’s Manual

200-890-5464 Page 1-2 Rev. 1, Aug. 2012

volume knob controls the intercom level for the pilot and copilot, while the large knob controls the pas­senger intercom volume. Intercom squelch is automatic.

A 3-light, 75 MHz Marker Beacon receiver is integrated in the KMA 30. This provides the necessary
Marker Beacon lights and audio indications necessary for that portion of an Instrument Landing System
(ILS) approach. A pushbutton labeled MKR allows the pilot select high or low sensitivity as well as test
and mute modes.

In the KMA 30, a Bluetooth® wireless interface is available for wireless telephone and music connection.

1.4 APPROVAL BASIS

FAA TSO Approval.

The KMA 30-series Audio Selector Panels are FAA approved under TSO C50c (Audio Amplifiers) and
TSO C35d (Marker Beacon Receivers), ETSO C50C/ and 2C53d.

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, Level D (Software Considerations for Airborne Equipment) and ED-
18/DO-214 (Audio Systems Characteristics and Minimum Operational Performance Standards for Air­craft Audio Systems).

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.

1.5 SPECIFICATIONS

TSO COMPLIANCE

Marker Beacon:

FAA TSO C35d, Class A ETSO 2C35d

Audio Selector/Intercom:

FAA TSO C50c, Class 1a ETSO C50c

APPLICABLE DOCUMENTS:

RTCA/DO-214 RTCA/DO-143 RTCA/DO-160D
RTCA/DO-178B DO-254

ENVIRONMENTAL Qualifications:

A1D1CABSMXXXXXXZBABATBXXE2XXX

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 behind panel 7.15 in. (18.16 cm)

WEIGHT

KMA 30 Unit
Rack with connectors

1.34 lb. (0.61 kg)

0.51 lb. (0.24 kg)

POWER REQUIREMENTS (Including Internal Lighting):

Voltage:

11 to 33 VDC

Maximum Current:

2.5 Amp (Externally protected by a 5A pull-type
breaker)

Bendix/King by Honeywell

KMA 30 Audio Panel and Intercom System

Installation and Operator’s Manual

200-890-5464 Page 1-3 Rev. 1, Aug. 2012

Audio Selector Specifications

Audio selector panel input impedance:

510 

Input Isolation:

-60 dB (min.)

Speaker Muting:

-60 dB (min.)

Speaker Output (into 4 ) with no clipping
14 VDC:
28 VDC:

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

Receiver Inputs:

9 (Com 1, Com 2, TEL, Nav 1, Nav 2, ADF, DME,
MKR, AUX)

Unswitched Inputs:

5 (including front jack)

Transmitter Selections:

4 (Com 1, Com 2, TEL
Com1/2)

Speaker Impedance:

4 

Headphone Impedance:

150 – 1000 

Headphone Output:

38 mW each headset, no clipping <1% THD typical

Microphone Impedance:

150 - 600 

Bluetooth Radio (KMA 30 -0702 only)

Class 3, FCC ID QOQWT32AE

Intercom Specifications

Intercom Positions: 6 places (with individual IntelliVox® circuits)
Music Inputs:

2, (Independent, Stereo)

Music Muting:

>-30 dB "Soft Mute" when Com or intercom active.

Distortion:

<1% THD @ 38 mW into 150

Mic Freq. Response, 3 dB:

300 Hz - 6000 Hz

Music Freq. Response, 3 dB:

10 Hz – 26 kHz

MARKER BEACON RECEIVER:

Frequency:

75 MHz Crystal Controlled
Sensitivity:
Low:
High:

Capable of: (preset at factory for field application)

1000 Volts (Hard) (360 to 570 V soft)

200 Volts (Hard) (130 to 200 V soft)

Selectivity:

-6 dB at ±10 kHz

-40 dB at ±120 kHz

External Lamp Output:

7.5 (±4 VDC unloaded, at maximum brightness) VDC

positive when active, max. current 125 mA
MM Sense:

Active high (4.5 ± 1.0VDC)

Table 1-1 Specifications

Bendix/King by Honeywell

KMA 30 Audio Panel and Intercom System

Installation and Operator’s Manual

200-890-5464 Page 1-4 Rev. 1, Aug. 2012

1.6 EQUIPMENT SUPPLIED

1 ea. of the following units:

Model Description Bendix/King Part

Number

PS Part Number

KMA 30 KMA 30 Audio Panel with Marker, Stereo Intercom, and Bluetooth

connectivity

89000003-100 050-890-5464

Table 1-2 Unit Part numbers

KMA 30 Installation Kit: 250-890-5464 Bendix/King Part Number 89000003-200

Description Quantity Part

Number

Installation rack assembly 1 430-890-5464
Rack back plate 1 430-890-0050

44-pin connector kit 2 120-891-2045­Backshell, connector 2 625-025-2465
Backshell Retainer 2 431-881-0100
4 40 X 7/16 screw w/nylon patch 4 475-440-0007
4 40 X 3/8 screw w/nylon patch 4 475-440-1038
4-40 x ¼” screw with lock washer 2 475-440-0001
Solder Lug 2 475-009-0001
Cable Clamp 1 625-001-0002
#6-32 x ½” Flat head Philips screw 6 475-632-0012
#6-32 Clip Nut 6 475-630-0002

Table 1-3 Installation Kit Contents

1.7 EQUIPMENT REQUIRED BUT NOT SUPPLIED

a. Circuit Breaker: 1 ea; 5 amp PULL TYPE REQUIRED for KMA 30
b. Speaker, 4 
c. Headphone Jacks (Stereo, as Required)
d. Microphone Jacks (as Required)
e. Headphones, 150  (Stereo), up to 6 as required
f. Microphones, up to 6 as required

g. Marker Antenna (75 MHz, VSWR <1:1.5, and appropriate for the airspeed)
h. Interconnect Wiring

1.8 OPTIONAL ITEMS

a. Cell Phone Patch Cord, 2.5mm to 2.5mm, PS Part Number 425-006-7026
b. Music Patch Cord, 3.5mm to 2.5mm, PS Part Number 425-006-2535
c. Phone patch cord for iPhone or Blackberry 3.5 mm 4-conductor to 2.5 mm

(Phone only, no music) 425-006-0354

1.9 LICENSE REQUIREMENTS

None
KMA 30 (050-890-5464 only) Bluetooth™ Radio approval:

 FCC ID: QOQWT32AE
 Industry Canada ID: 5123A-BGTWT32AE
 CE EMC Directive 89/336/EEC as amended by Directives 92/31/EEC and 93/68/EEC

Bendix/King by Honeywell

KMA 30 Audio Panel and Intercom System

Installation and Operator’s Manual

200-890-5464 Page 2-1 Rev. 1, Aug. 2012

Section II - INSTALLATION

2.1 GENERAL INFORMATION

2.1.1 SCOPE

This section provides detailed installation and interconnection instructions for the Bendix/King KMA 30
Audio Selector Panel/Intercom/ with internal Marker Beacon.

Please read this manual carefully before beginning any installation to prevent damage and post­installation problems. Installation of this equipment requires special tools, test equipment (refer to section

2.12.1) and knowledge as required by 14 CFR 65.81 (b).

2.1.2 Certification Requirements

NOTE

The KMA 30 requires specialized knowledge and tools for an effective installation. An appropriately rated
Certified Aircraft Repair Station must install this equipment in accordance with applicable regulations.
Bendix/King, Incorporated warranty is not valid unless the equipment is installed by an authorized Ben­dix/King, 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 Bendix/King. If the unit
or accessories show any sign of external shipping damage, contact Bendix/King to arrange for a replace­ment. Under no circumstances attempt to install a damaged unit in an aircraft. Equipment returned to
Bendix/King for any other reason should be shipped in the original Bendix/King packaging, or other UPS
approved packaging.

2.3 Equipment Installation Procedures

2.3.1 Cooling Requirements

Forced air-cooling of the KMA 30 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 KMA 30 must be rigidly mounted to the instrument panel of the aircraft structure, within view and
reach of the pilot position(s). Installation must comply with FAA Advisory Circular AC 43.13-2B, or
other FAA-approved aircraft technical data. The unit may be mounted in any area where adequate clear­ance for the unit and associated wiring bundle exist.

To prevent noise, avoid installing the unit 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.

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

Bendix/King by Honeywell

KMA 30 Audio Panel and Intercom System

Installation and Operator’s Manual

200-890-5464 Page 2-2 Rev. 1, Aug. 2012

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 Audio Panel Tray and Connector Assembly

The rack connectors mate with two 44-pin connectors in the KMA 30. The connectors are a sub-miniature
crimp-type, and require the use a hand crimp tool, from table below (or equiv.). The connectors are
mounted to the tray back plate with #4-40 screws (475-440-1038), from the inside of the tray and the
mounting block, 431-891-0100. Ensure that proper strain relief and chafing precautions are made during
wiring and installation, using the cable clamp (625-001-0002).

Two grounding lugs are provided, which may be attached to the rear mounting plate with 2 ea #4-40 x ¼”
screws with captivated lock washers. These provide a convenient location to connect the shield ground
terminations.

Manufacturer Crimping Tool Positioner Extraction tool

AMP 601966-1 601966-6 91067-1
Daniels AFM8 K42 M24308-1
ITT-Cannon 995-0001-584 995-0001-739 91067-1

Table 2-1 Connector Pin crimping tools

2.4 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.

Refer to FAA Advisory Circular 43.13-2B 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 Bendix/King warranty.

2.4.1 Electrical 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 KMA 30 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 connec­tor, J2 pins 8 & 9, of the KMA 30 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 KMA 30 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
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.

The shields can be daisy-chained together, and then connected to the ground lugs mounted on the back
plate shown in Appendix B.

Bendix/King by Honeywell

KMA 30 Audio Panel and Intercom System

Installation and Operator’s Manual

200-890-5464 Page 2-3 Rev. 1, Aug. 2012

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.

2.4.1.1 Music Inputs and Noise

KMA 30 units utilize a differential input to help prevent noise from entering the music system. This fea­ture is usually transparent to the installer; however, it is important that the appropriate music signal and
ground connections are made directly to the dedicated music signal and ground inputs on the KMA 30.
The power for IFE and audio panel should be a common bus.

If a music jack instead of a music source is installed for Music 1 or 2, we recommend grounding the jack
to airframe ground.

NOTE
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.
Bendix/King makes no claim that the audio panel will provide a noise-free audio quality under all instal­lation conditions, particularly with older avionics.

2.4.2 Existing GMA340 Installation

If the installation replaces a GMA340, no changes are necessary as long as the existing installation meets
the requirements. All existing functions of the GMA340 as well as all of the new capabilities afforded by
the KMA 30 will become instantly available. Be advised, the KMA 30 does not support 3 VHF Coms,
however. The KMA 30 handles two COM transceivers and a full-duplex cellular/satellite telephone.

Added capabilities include, IntelliVox®, DuTel™ duplex telephone, improved music fidelity and Soft
Mute™ and Karaoke™ muting modes, improved and more flexible music distribution control, internal
recorder function, and additional unswitched audio inputs.

Installations where the external marker outputs are connected to a Sandel 3308 Navigation Display will
require additional loading resistors. Refer to the Sandel installation data for more information.

2.4.3 Power

The KMA 30 is compatible with both 14 and 28 Volt DC systems. A five (5) Amp circuit breaker is re­quired for all installations. Power and ground wires should be #22 connected to J2 Pins 8 and 9. Connect
airframe ground to J2 Pin 10 and 11 only. No dropping resistors are required.

2.4.4 Audio Panel interface

The KMA 30 is designed to interface with standard aircraft avionics, and presents a 510 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.

2.4.4.1 Speaker Load

The KMA 30 contains one 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 COM 2 Speaker load input on the KMA 30 (J1 27 WRT

28). The speaker load is 16 , 3W.

2.4.5 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.

Bendix/King by Honeywell

KMA 30 Audio Panel and Intercom System

Installation and Operator’s Manual

200-890-5464 Page 2-4 Rev. 1, Aug. 2012

2.4.6 Backlighting

The KMA 30 has an automatic dimming of the pushbutton annunciation LEDs and marker lamps con­trolled by a photocell. Control of the unit backlighting is through the aircraft avionics dimmer For 14 V
aircraft, connect J2 Pins 6 and 7 to the aircraft dimmer bus, and pin 5 to ground. For 28-volt systems,
connect pin 7 to the aircraft dimmer, and pins 5 and 6 to ground.

If an external dimmer control is not used, a constant back light illumination can be established for night­time viewing. Pin 6 or 7 (depending on system voltage) must be tied to power (J2, pin 8 or 9) for the back
lighting system to work. The photocell mounted in the unit face will automatically adjust the intensity of
the push-button annunciator LEDs.

2.4.7 Unswitched inputs

J1, pins 31, 29 and J2 pin 15 are unswitched, unmuted (by transmitter keying), inputs # 1, 3 and 4, re­spectively. These inputs are presented to the pilot and copilot regardless of the audio configuration, and
will always mute the entertainment inputs. These 510Ω inputs can be used for altimeter DH audio, GPS
waypoint audio, autopilot disconnect tones, or any other critical audio signal. Unswitched #1 is always
presented to the speaker, plus 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 and to the aircraft speaker.

Unswitched

Input

Hear in

Fail Safe

Hear in

Crew Headset

SPR button

Select

Gain

1 Yes Yes No 1:1(fixed)
2 No Yes Yes 1:1(fixed)
3 No Yes No Adjustable
4 No Yes No 1:1(fixed)

5 (jack) No Yes No 1:1(fixed)

Table 2-2 Unswitched input table

Unswitched #2, J1 pin 44 is unswitched is always connected to the Pilot’s headphone. However, this
unswitched audio is only presented to the aircraft speaker when the SPR push button has been selected.

The audio low for unswitched #4 (J2, pin 15) should be connected to a convenient audio low. However,
this should NOT be connected to Music Low.

Unswitched #1 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 adjust the volume level of that unswitched input. Refer to Adjustments section.

The front panel jack can be configured to act as a fifth unswitched input. When configured through the
front panel function switches (see operational section), the audio input to this jack will be presented to the
pilot and copilot headsets, and not muted.

NOTE

The front-mounted utility jack is intended for portable equipment that is advisory in nature. It is NOT
INTENDED for use as a primary warning channel. Audio of importance MUST ALWAYS be hard-wired
into the unswitched inputs of the audio panel.

2.4.8 "Swap" Mode

When a momentary, normally open, push-button switch is connected between pin 20 on the J2 connector
and aircraft ground, the user can switch between Com 1 and 2 by depressing this switch without having to
touch the mic selector switch. This yoke-mounted switch eliminates the need to remove your hands from

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the yoke to change transceivers. The transfer of TX indication from Com 1 to Com 2 shows that the swap
has been initiated; there is no dedicated swap indicator.

2.4.9 TEL (Duplex) Function for Cell Phones

Audio streams selected by the intercom mode are provided to the TEL output, and audio from TEL is pre­sented to the headset. This allows a telephone-like audio interface.

The TEL mode in the KMA 30 is compatible with many cellular telephones with hands-free headset inter­faces. The front panel 3/32” utility jack can be used as the interface to the Cell Phone, or a jack can be
installed somewhere on the aircraft panel. The wired interface jack is connected with the KMA 30 as
shown: A patch cord (3/32” to 3/32”) is available from Bendix/King under P/N 425-006-7026.

3/32" Cellular Jack

COM 3 Mic Input

Com 3 Audio

Audio Lo

KMA 30
J1

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

This is a typical interconnect
Bendix/King does not guarantee
compatability in all cases.

Cellular Phone
Interconnect

Figure 2-1 Cellular telephone interface for rear connector, if an additional jack is desired

The KMA 30 is compatible with most Bluetooth® enabled devices for making and receiving telephone
calls through the aircraft audio system.

2.4.9.1 Cell phone Sidetone

As shipped from Bendix/King, the KMA 30 does provide cellular telephone sidetone (the user’s voice fed
back to the headset). Some cell phones already provide sidetone. In KMA 30 audio panels, Telephone
sidetone can be disabled if desired by pressing the TEL and ADF buttons for more than one second.

NOTE

Unauthorized use of unapproved cellular telephone devices in aircraft is subject to FCC enforcement ac­tion, which may include a $10,000 fine per incident.
FCC Regulation 47 CFR § 22.925 Prohibition on airborne operation of cellular telephones.
Cellular telephones installed in or carried aboard airplanes, balloons or any other type of aircraft must not
be operated while such aircraft are airborne (not touching the ground). When any aircraft leaves the
ground, all cellular telephones on board that aircraft must be turned off.
Bendix/King, Inc. does not endorse using unapproved cellular telephone equipment in flight, and takes no
responsibility for the user’s action.
Bendix/King does not guarantee compatibility with personal cellular telephones.

2.4.10 Public Address Mode

By pressing the Mute and SPR pushbuttons at the same time, the KMA 30 will be placed into public ad­dress (PA) mode. In this mode, the pilot will be talking over the cockpit speaker when he presses his PTT
switch. Copilot will still continue on the selected COM radio.

When the discrete Output is enabled, J2 Pin 19 will go low when in PA mode, providing a logic level that
can be used to incorporate a speaker-switching scheme. This 50 mA circuit (10Ω Z) can control a switch­ing means such as a relay that would transfer the speaker output amplifier from the cockpit speaker to

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drive another cabin speaker. If the PA mode is used with a microphone in proximity to an active cockpit
speaker, feedback might result.

To enable the PA discrete Output located at the rear connector, the internal configuration jumper, J4,
MUST be placed across both pins in the header. This jumper is shipped as open from the factory.

2.4.10.1 Public Address Output Jumper

1. Remove qty. 5 Phillip head screws from the PM8000B. NOTE: THE SCREW IN THE REAR

OF THE PANEL IS A DIFFERENT LENGTH THAN THE OTHER FOUR. YOU MUST
PUT THE SHORTER LENGTH SCREW BACK IN THE SAME LOCATION OR
DAMAGE WILL OCCUR. See Figure #1.

Figure 2-2 Screw Locations

2. Move the blue jumper located in the back corner near the sub-D connectors on both pins of J4.

See Figure #2-3.

Long shaft screws

Short shaft screw

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Figure 2-3 Jumper Location

4. Place the lid back on the unit, aligning holes.

5. Install and tighten qty. 4 long thread screws into the lid, and one short screw on the rear.

2.4.11 PA Mute (J2, Pin 12)

Pin 12 of J2 is a TTL logic output that is pulled low during PTT operation.

2.4.12 Miscellaneous Logic Output (J2, Pin 18)

Pin 18 of the J2 connector is pulled to ground whenever the AUX button is depressed. This serves as a
control line for external devices, such as an entertainment system that the pilot wishes to control.

This pin can also be used to control passenger (Music 2) Karaoke Mode, by connecting to pin 13 of the
J2.

NOTE
J2, Pin 18 should NOT be used if the AUX is going to be used to switch DME or auxiliary audio.

2.4.13 Audio Active Output

Pin 24 on the J1 connector (and PA Mute Pin 12 on J2) should be connected to Apollo CNX80 for audio
message prioritization, refer to CNX80 installation manual for details.

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 panel end only, and tie to the audio low inputs
as shown.

2.5.1 Entertainment Inputs

The KMA 30 has two INDEPENDENT music inputs, PLUS a front mounted jack that is connected to
Entertainment 1. Entertainment input number 1 is J2 pins 23 (left channel) and 24 (right channel), with
respect to pin 25, and Entertainment number 2 is connected to 26 (left channel), 27 (right channel), with
respect to 28.

KMA 30 (050-890-5464) has wireless connectivity to stream music from a paired Bluetooth device. This
stream is distributed as Music 1. Refer to §3.11.3 for more information.

NO T E
Us e th e low le v e l out pu t of a n y a d di ti on al e n t er ta in m e n t d evi ce to con n e ct t o t h e a u­di o p an el . Ma x i m um s ig n a l l evel i s 3 V AC p- p. D O NO T u se a sp ea k er -l evel ou tp ut ,
th i s wi ll c a u s e i n te r n a l da m a ge in th e au d i o p a n el .

2.5.2 Entertainment muting

The KMA 30-system incorporates a four-mode "Soft Mute™" system. This will mute the entertainment
devices during ICS and/or radio conversation. See Section 3.8 for more information.

Jumper Off (no
PA mode)

Jumper On
(PA mode
enabled)

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Press the Mute switch to activate the four Karaoke modes (disabling crew SoftMute™). Turning down the
entertainment volume allows the pilot to place the entertainment into the background while having the
radios in the foreground and eliminates the constant interruption of the music while still keeping the ra­dios a priority.

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 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.

2.5.2.1 Entertainment 2 Mute (J2 Pin 13 & 14)

Connecting J2 pin 13 to pin 14 (or 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.

If desired, the AUX button can act as the passengers’ mute control. Connect J2 pin 18 (AUX logic) to J2
pin 13 (Entertainment. 2 Mute inhibit). Then, Entertainment 2 will not mute when the AUX button is on.
(Not recommended if DME is input is used.)

2.5.3 Configuring Music Input with Function Keys

The music inputs can be configured by the user from the front panel (see section 3.10). There are three
configurations available, independent, ICS mode dependent, and single input (music 1 to all stations).

If the inputs are independent, Input #1 (or the front jack) is provided to the pilot and copilot. Muting
(SoftMute™) is controlled by the front panel “mute” button. Music 2 is provided to the passengers at all
times, with muting controlled by an external switch (see § 2.5.2.1).

If the inputs are intercom mode dependent, input 1 goes to the pilot, copilot, and all passengers when the
intercom is in the “ALL” mode. In “ISO” mode, the copilot and passengers will hear music input 1. Music
2 is ONLY active in CREW mode, and then provided only to the passengers. The externally switched pas­senger SoftMute™ control becomes active in CREW.

If the single-source mode is activated through the function keys, the front panel jack (and music 1) is con­nected to all intercom positions, regardless of the intercom mode. Crew muting is controlled by the front
panel, passenger muting controlled through the switch. See section 3.11 for more details.

2.5.3.1 Annunciation and recorder playback

The pilot and copilot can hear the Function Key annunciations. If the customer wants to exclude playback
and function key annunciation playback from the copilot position, contact Bendix/King for more informa­tion.

2.5.4 Playback button Installation

Internal Recorder can be played back from the front panel. A remote momentary, normally open (NO)
push button switch may be installed if desired to remotely activate the Recording System playback. This
switch can be located anywhere in cockpit convenient to the pilot's reach. The NO switch should be con­nected to pin 22 of J2 of the KMA 30, and ground. When installed, this button will act as in § 3.13.

2.6 Marker Beacon Installation

2.6.1 Marker Antenna Installation

A marker beacon antenna, appropriate to the type and speed of the aircraft, is required (not included).
Refer to aircraft and antenna manufacturer's installation instructions, as well as AC43.13-2B (or later

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revision), Chapter 3, for information on proper antenna installation techniques. The marker beacon an­tenna must be mounted on the bottom of the aircraft.

2.6.2 External Marker Lights

For installations that require external marker beacon lights, there are three outputs that can drive 12-Volt
lamps only. The external output lamps are driven high (typically +7.0 VDC 4.0 VDC unloaded, at MAX
brightness) when active. Maximum source current per lamp is 125 mA. Voltage varies with photocell
dimming.

2.6.3 Middle Marker Sense

A Middle Marker Sense output signal is available from the PMA8000 to certain flight control systems.
This function will not operate during the test mode. This output will go to +4.5 VDC ( 1.0 VDC) when a
valid Middle Marker signal is received. This output is J1, pin 39.

2.7 Adjustments

The KMA 30 is factory adjusted to accommodate the typical requirements for most aircraft configurations.
There are three adjustments in the top cover that allow the installer to tailor the specific functions.

Figure 2-4- KMA 30 Adjustments, top cover

 Speaker Volume- Turn adjustment clockwise to increase cabin speaker output.

 Marker Beacon Volume, turn adjustment counterclockwise to increase marker beacon audio

level.

 TEL volume, turn adjustment Clockwise to increase the incoming telephone audio.

 ANN VOL Function Mode Annunciation Volume – controls the level of the to access voice an-

nunciations contained in the unit. (Top cover must be removed).

Front

of unit

NOTE:

If top cover is removed
for ANY reason, you
MUST replace the cover
screws with the proper
length, otherwise damage
will result.

Shorter Screw

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 Unswitched Input 3 Volume, adjust from 50% to 200% of input value. (Bottom cover must be

removed).

Figure 2-5 – Unswitched 3 Audio Level (bottom cover removed)

2.8 Communications Antenna Installation Notes

For best results while in Split Mode, it is recommended that the one VHF communications antenna is lo­cated on top of the aircraft while the other communications antenna is installed on the bottom. Any an­tenna relocation must be accomplished in accordance with AC 43.13-2B, aircraft manufacturers’ recom­mendations and FAA-approved technical data.

WARNING

It is probable that radio interference will occur in the split mode when the frequencies of the two air­craft radios are adjacent, and/or the antennas are physically close together. Bendix/King makes no
expressed or implied warranties regarding the suitability of the KMA 30 in Split Mode.

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2.9 KMA 30 Pin assignments

J1 Function J2 Function

1 Mkr Ant 1 Pilot Phones Low
2 Mkr Ant Low 2 Copilot Phones Low
3 Telephone Audio in 3 Copilot Phones (L)
4 Telephone Low 4 Copilot Phones (R)
5 Telephone Mic Audio 5 Lights Low
6 Telephone Mic Key 6 14/28 V Lights
7 ADF Audio In 7 14/28 V Lights
8 ADF Audio Low 8 Aircraft Power

9 Com 1 Audio 9 Aircraft Power
10 Com 1 Audio Low 10 Aircraft Ground
11 Com 1 Mic 11 Aircraft Ground
12 Com 1 Mic Key 12 PA Mute
13 Com 2 Audio 13 Mute Inhibit
14 Com 2 Audio Low 14 Mute Inhibit Low
15 Com 2 Mic 15 Unswitched #4
16 No Connect 16 Pilot Phones (L)
17 Nav 1 Audio 17 No connect
18 Nav 1 Audio Low 18 Misc (AUX) logic output
19 Nav 2 Audio 19 PA Enable Output
20 Nav 2 Audio Low 20 Swap
21 DME Audio 21 Swap Low
22 DME Audio Low 22 IRS Playback
23 Auxiliary Audio Input 23 Music 1 (L)
24 CNX80 Inhibit 24 Music 1 (R)
25 No connect 25 Music 1 Low
26 No connect 26 Music 2 (L)
27 Com 2 Speaker Load 27 Music 2 (R)
28 Com 2 Speaker Load 28 Music 2 Low
29 Unswitched Audio 3 29 No Connect
30 Com 2 Mic Key 30 No Connect
31 Unswitched # 1 31 Pilot Phones (R)
32 Unswitched #1 Low 32 Copilot Mic Audio
33 Pilot Mic Audio 33 Copilot Mic PTT
34 Pilot Mic PTT 34 Copilot Mic Low
35 Pilot Mic Low 35 Pass 1 Mic Audio
36 Ext IM MKR 36 Pass 1 Mic Audio Low
37 Ext OM MKR 37 Pass 2 Mic Audio
38 Ext MM MKR 38 Pass 2 Mic Audio Low
39 MM Sense 39 Pass 3 Mic Audio
40 Pass HP (L) 40 Pass 3 Mic Audio Low
41 Pass HP (R) 41 Pass 4 Mic Audio
42 Pass HP Low 42 Pass 4 Mic Audio Low
43 Unswitched #2 Low 43 Speaker Low
44 Unswitched #2 Audio 44 Speaker Output

Table 2-3 Pin Assignments

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2.10 Wiring Checkout

After wiring is complete, verify power is ONLY on pins 8 and 9 of the J2 and airframe ground on connec­tor pins 10 and 11. Failure to do so will cause serious internal damage and void Bendix/King's warranty.

2.11 Unit Installation

To install the KMA 30, gently slide the unit into the mounting rack until the hold-down screw is engaged.
While applying gentle pressure to the face of the unit, tighten the 3/32" hex-head in the center of the unit
until it is secure. DO NOT OVER TIGHTEN.

CAUTION
Apply steady pressure to the bezel while screwing the unit into the tray to ensure even seating of the unit
and connectors. WARNING Do not over-tighten the lock down screw while installing the unit in tray.

Internal damage will result.

2.12 Operational Checkout

2.12.1 Required Test Equipment

In order to return an aircraft to service after installation of the KMA 30, the installer must have access to
a Marker Beacon signal generator:

a. IFR NAV401L, NAV402AP, IFR4000
b. TIC T-30D, T-36C

Equivalent test equipment is acceptable as long as the testing requirements can be met.

2.12.2 Audio Panel Test

NOTE

The IntelliVox® is designed for ambient noise levels of 80 dB or above. Therefore some clipping may oc­cur in a quiet cabin, such as without the engine running, in a hangar. This is normal.

1. Apply power to the aircraft and avionics.

2. Plug headsets into the pilot, copilot, and occupied passenger positions.

3. Verify fail-safe operation by receiving and transmitting on com 1 from the pilot position, with the

audio panel power off. The Com audio will be present in one ear cup only.

4. Switch on the unit by pressing the volume (VOL) knob.

5. Check intercom operation.

6. Push the Com 1 Xmt select button (lower row).

7. Verify that both of the Com 1 buttons light. Verify that transmit button LED (Light Emitting Diode)

near the mic selector is not blinking. If the LED is blinking, stop testing and troubleshoot the micro­phone PTT installation.

8. Verify proper transmit and receive operation from the copilot position, noting that the copilot PTT

switch allows proper transmission on the selected transceiver. Verify that the Com 1 Xmt button
blinks when transmitting.

9. Verify that pushing the COM 2 button causes the button to illuminate, and the Com 2 receiver to be

heard. Verify operation on Com 1 from the pilot position.

10. Repeat for Com 2

11. Press and hold the Com 1 Xmt button. While holding the Com 1 button, press the Com 2 Xmt button.

This places the unit in “split Mode;” Verify that the pilot can transmit and receive on Com 1, while
the copilot transmits and receives on Com 2.

12. Verify proper operation of all receiver sources by selecting them using the appropriate button. The

button illuminates to show which source is in use.

13. Push the SPR button. Verify that all selected audio is heard in the cockpit speaker. Verify that the

audio mutes when the mic is keyed.

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14. Verify that the appropriate LED in the lower button row blinks when either push to talk is keyed.

15. Verify proper Intercom system operation in the ALL, ISO and CREW modes (see Table 3-1).

16. Verify that the audio selector panel system does not adversely affect any other aircraft system by sys-

tematically switching the unit on and off, while monitoring the other avionics and electrical equip­ment on the aircraft.

2.12.3 Marker Checkout

1. Connect a ramp generator at the antenna end of the marker coax. With the unit under test in HI sensi-

tivity, verify that a 160 V, modulated 95% with 1300 Hz, signal will illuminate the amber (M)
marker light, and that marker audio is present in the headphones when the Marker Audio (MKR)
push-button has been depressed. Select SPR for speaker to verify marker audio availability on the
cabin speaker. Verify that the white (I) and blue (O) lights will illuminate within  3dB of the amber
lamp, with 3000 HZ and 400 Hz applied, respectively.

2. Repeat with the unit in LOW sensitivity, with 430 Volts applied.

3. Connect the marker antenna and verify proper operation.

2.12.4 TEL Checkout

Press the TEL button. Verify that the pilot headset is connected to the cellular telephone system (if in­stalled). Verify that by using the pilot side PTT, the pilot can transmit on the other selected radio (Com 1
or Com 2). The telephone function will allow any person heard by the pilot on the intercom, also heard on
the telephone.

2.12.4.1 Bluetooth Checkout (050-890-5464 only)

Verify that the KMA 30 will “pair” with a Bluetooth device, and interface with cellular phone and Music
source. See section 3.12 for more information.

2.12.5 Internal Recorder Checkout

With headset plugged into pilot’s side jacks, tune COM 1 to local frequency, such as FSS or ATC ground.
Select Com 1 on mic selector switch, and record several incoming radio transmissions.
Press the Com receiver pushbutton that corresponds to the selected radio transmitter and hold for ap­proximately one second. This action will then automatically play back the last recorded message. Press
and HOLD the button again to stop the play back, and then momentarily press again to play prior mes­sages.
This audio should appear in the pilot and copilot headsets, and only be incoming transmissions from the
transceiver selected in the mic select switch. Depress the audio panel or yoke mounted playback switch,
and verify that messages play, in the order received. Repeat for COM 2. The playback will be stopped by
audio on the selected com. The message can be replayed from the beginning, and audio received during
the playback will not be stored.

2.12.6 Function Button Checkout

While listening to the pilot’s headset, press and hold the “TEL” button. Press the AUX, MUTE and SPR
buttons, verifying that the annunciations play back in pilot headset. See operation section for information.
Incoming audio on selected com will stop the audio.

2.13 Final Inspection

Verify that the wiring is bundled away from all controls and no part of the installation interferes with air­craft control operation. Move all controls through their full range while examining the installation to see
that no mechanical interference exists. Verify that the cables are secured to the aircraft structure in accor­dance with good practices, with adequate strain relief. Ensure that there are no kinks or sharp bends in the
cables and coaxial cables. Verify that the cables are not exposed to any sharp edges or rough surfaces, and
that all contact points are protected from abrasion.

Complete documentation that may be required, such as a logbook entry, weight and balance computation and FAA
Form 337. Sample text for FAA Form 337, and instructions for continuing airworthiness can be found in Appendix F.
Return completed warranty registration application to Bendix/King.

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Section III OPERATION

3.1 SCOPE

This section provides detailed operating instructions for the Bendix/King KMA 30, Audio Selector
Panel/Marker Beacon Receiver/Intercom Systems. Please read it carefully before using the equipment so
that you can take full advantage of its capabilities.

This section is divided into sections covering the basic operating areas of the KMA 30 systems. They are
Communications Transceiver Selection, Audio Selector, Intercom, Marker Beacon Receiver and special
functions, including the Bluetooth® functionality in the KMA 30.

Figure 3-1 KMA 30 Operating Controls

Unit power is turned on and off by pushing the volume knob. In the OFF or "EMG" position, the pilot
headset is connected directly to Com 1 as well as unswitched input #1. This allows communication capa­bility regardless of unit condition. Any time power is removed or turned OFF, the audio selector will revert
to fail-safe mode.

The power switch controls all audio selector panel functions, intercom and marker beacon receiver. All
pushbutton selections will be remembered and return to the last state when turned on.

3.2 Communications Transmit (XMT) Selection (2)

There are two pushbuttons associated with the transmitter selection. The two lower buttons (# 2) control
which transceiver is selected for transmit. The top row of pushbuttons (# 3) allows selection of the receiver
audio. Push the lower button to select the desired COM transmitter.

The PMA8000B-Series has an automatic selector system. Audio from the selected transceiver is automati­cally heard in the headsets and speaker (if selected). You can check this function by switching from COM
1 transmitter to Com 2 transmitter by pressing the COM 2 transmitter selector pushbutton. See that the
associated Com 2 receive pushbutton indicator light turns green. This guarantees that the pilot will always
hear the audio from the transceiver selected for transmit.

The KMA 30 “remembers” the receiver selection, so that when switching transmitters from COM 1 to
COM 2, if COM 2 audio was previously selected, COM 1 audio will continue to be heard. This eliminates
the pilot having to switch Com 1 audio back on, after changing transmitters.

When switching from COM 1 to COM 2 while Com 2 was not previously selected, COM 1 audio will be

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switched off. In essence, switching the mic selector will not override prior selection of COM receiver au­dio.

In normal (not split) modes, the KMA 30 gives priority to the pilot’s radio Push-To-Talk (PTT). If the
copilot it transmitting, and the pilot presses his PTT, the pilot’s microphone will be heard over the se­lected com transmitter.

In TEL mode, the pilot microphone and headphones are connected to the cell phone. The pilot PTT will
switch the pilot mic to the selected com transceiver, and allow continued aircraft communications to con­tinue. (See Section 3.4 —TEL—for more details)

The copilot will also be able to transmit on the other selected radio with his PTT as well.

3.2.1.1 Split Mode

The split mode can be activated at any time by pressing the COM 1 and COM 2 XMT buttons at the same
time. This places the pilot on COM 1 and the Copilot on COM 2.

Pilot on COM 2 and Copilot on COM 1 is not possible.

NO T E

Due to the nature of VHF communications signals, and the size constraints in general aviation aircraft, it
is probable that there will be some bleed-over in the Split mode, particularly on adjacent frequencies.
Bendix/King makes no warranty about the suitability of Split Mode in all aircraft conditions.

When the split mode is activated, the intercom between the pilot and copilot is inhibited, although the
passengers can still talk among themselves. The crew intercom can be reactivated if desired by pressing
the “Mute” button. The indicator LED in the Mute button will be green when the intercom is off (muted),
and turn off to indicate that the intercom is not muted, and the crew can speak to each other.

3.2.1.2 Swap Mode (Switch from Com 1 to Com 2 remotely)

With a yoke mounted, normally open momentary switch, the pilot can change from the current Com
transceiver to the other by depressing this switch. To cancel "Swap Mode," the pilot may either press the
yoke mounted switch again, or select a different Com with the XMT buttons.

3.2.1.3 Monitor Mode

The KMA 30 is equipped with a Monitor function, which allows a secondary com radio audio to be muted
by the primary radio (selected for transmit). See §3.11.2 for more information.

3.3 Audio Selector (4)

Communication audio from the other radio, not selected for transmit, can be heard by pressing the associ­ated RCV button. You will always hear the audio from the selected transceiver.

Navigation receiver audio is selected through five momentary, push-button, backlit switches.

The users can identify which receivers are selected by noting which green switch LEDs are lit. Navigation
aid audio push buttons are labeled Nav 1, Nav 2, MKR (Marker), ADF and AUX (auxiliary). DME au­dio (if present) will come through when the AUX button is selected. When one of these buttons is pressed,
the mode is active, and the LED will illuminate. Press the switch again and it will be "off" and remove
that receiver from the audio output.

In SPLIT mode, only the pilot will hear selected navigation audio.

3.4 Telephone (TEL) (9)

The TEL mode serves as a full duplex interface and distribution for telephone systems such as AirCell or
portable cellular phones with earpiece jacks. Pressing the TEL button activates the telephone mode.

This connects the telephone to the users as follows:

In ALL intercom mode, all crew and passengers will be heard on the phone when they speak. Com and
other selected radio audio is also heard in the headsets. If the pilot or copilot pushes the radio PTT, their

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KMA 30 Audio Panel and Intercom System

Installation and Operator’s Manual

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mic will be transferred to the selected Com radio. The telephone party will not hear ATC communica­tions, and vice versa.

In CREW mode, only the pilot and copilot are connected to the telephone. Passengers will not hear the
telephone. The pilot and copilot will also have transmit capability on the other selected transceiver.

In ISO intercom mode, when the KMA 30 is in the TEL mode, the pilot position is in the "Phone Booth."
Only the pilot will hear the telephone, and only he will be heard. He will also have access to Com 1 or 2,
and will transmit on that radio using the PTT. All selected audio is provided to the pilot.

NOTE

Because the cell-phone uses an intercom circuit, all stations on that circuit will lose intercom capability
when the cell phone is in use.

3.4.1 Cell phone Sidetone

As shipped from the factory, the KMA 30 does NOT provide cellular telephone sidetone (the user’s voice
fed back to the headset). Some cell phones do not provide sidetone. In KMA 30 audio panels, Telephone
sidetone can be enabled by pressing the TEL and ADF buttons for more than one second.

3.5 Speaker Amplifier (5)

The SPR in the lower right section stands for speaker. This switch will place all selected audio on the
cockpit speaker when this switch is selected. Except for the unswitched audio, the speaker amplifier is not
active in the "Split Mode”.

Unswitched audio, (the inputs dedicated to autopilot disconnect, altimeter warning, etc.) will come
through the speaker regardless of the speaker button position.

Depending on installation, important audio annunciations such as radar altimeter or autopilot disconnect
will come over the speaker even if it is not selected, while other unswitched, but muted inputs, such as
GPS alerts, will only be present if the SPR button is selected. Consult your professional avionics installer
for these important configuration details.

3.5.1.1 Public Address Function

To access PA function, press the Mute and SPR buttons
simultaneously. The pilot microphone will be heard on the speaker
when the pilot PTT is used. The copilot can continue to use the
selected com radio while the pilot will now be heard over the
speaker. During Public Address, the Mute and SPR buttons will
flash. To exit PA mode, push Mute and SPR again.

3.6 Marker Beacon Operation (10)

The Marker Beacon Receiver uses visual and audio indicators to alert you when the aircraft passes over a
75 MHz transmitter.

The Blue lamp, labeled “O”, is the Outer Marker lamp and has an associated 400-Hertz 'dash' tone. The
lamp and tone will be keyed at a rate of two tones/flashes per second when the aircraft is in the range of
the Outer Marker Beacon.

The Amber lamp, labeled “M”, is the Middle Marker lamp and is coupled with a 1300 Hertz tone. It is
keyed alternately with short 'dot' and long 'dash' bursts at 95 combinations per minute.

The White lamp, labeled “I”, is the Inner marker and has a 3000 Hertz 'dot' tone. The lamp and tone will
be keyed at a rate of six times per second.

The audio from the Marker Beacon Receiver can be heard by selecting the "MKR" push-button switch. To
adjust the volume level, there is a service adjustment located on the top of the unit.

A pushbutton is used to set the receiver sensitivity and to test the indicator lamps mute the marker audio.

Figure 3-2 PA Function buttons

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KMA 30 Audio Panel and Intercom System

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Use "HI" sensitivity initially. This allows you to hear the outer marker beacon about a mile out. Then
touch the smaller MKR button to switch into Low Sensitivity mode. “LO” sensitivity gives you a more
accurate location of the Outer Marker. Holding the MKR button for one second activates marker test
lamp, labeled "T/M" and illuminates all three lamps simultaneously to assure the lamps (internal and ex­ternal) are in working order. TST does not activate MM autopilot sense output. Releasing the button re­turns to the last sensitivity.

Pressing the marker mode select (“T/M”) for one second will also cause the marker audio to mute for that
beacon. The next beacon received will re-activate the audio.

3.7 Intercom Operation

3.7.1 IntelliVox® VOX-Squelch

No adjustment of the IntelliVox® squelch control is necessary. There is no field adjustment. Through
three individual signal processors, the ambient noise appearing in all six microphones is constantly being
sampled. Non-voice signals are blocked. When someone speaks, only their microphone circuit opens,
placing their voice on the intercom.

The system is designed to block continuous tones; therefore people humming or whistling in monotone
may be blocked after a few moments.

For consistent performance, any headset microphone must be placed within ¼-inch of your lips, prefera­bly against them. (ref: RTCA/DO-214, 1.3.1.1 (a)).

NOTE

It is also a good idea to keep the microphone out of a direct wind path. Moving your head through a vent
air stream may cause the IntelliVox® to open momentarily. This is normal.

The IntelliVox® is designed to work with normal aircraft cabin noise levels (70 dB and above). It loves
airplane noise! Therefore, it may not recognize speech and clip syllables in a quiet cabin, such as in the
hangar, or without the engine running. This is normal.

For optimum microphone performance, Bendix/King recommends installation of a Microphone Muff Kit
from Oregon Aero (1-800-888-6910). This will not only optimize VOX performance, but will improve the
overall clarity of all your communications.

Manufacturer Model Mic Muff™ Part Number

Bose Dynamic

Electret
M87 Dynamic

90010
90015
90020

David Clark H10-30

H10-20, H10-40
H10-13.4

90010
90015
90015

Lightspeed All 90015

Peltor 7003

7004

90010
90015

Pilot 11-20 & 11-90 90015

Sennheiser 90015

Telex Airman 750, Echelon

AIR3000

90015
90010

Table 3-1 Mic Muff ™ Part Numbers

3.7.2 Intercom Volume Control (7)

The inner volume control knob adjusts the loudness of the intercom for the pilot and copilot. It has no
effect on selected radio levels, music input levels or passengers' volume level.

Bendix/King by Honeywell

KMA 30 Audio Panel and Intercom System

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The outer volume control knob controls intercom volume for the passengers. It has no effect on radio or
music levels.

Adjust the radios and intercom volume for a comfortable listening level. Most general aviation headsets
today have built-in volume controls; therefore, volume also can be further adjusted at the individual head­set.

3.7.2.1 Mono headsets in Stereo Installation

The pilot and copilot positions work with stereo or mono headsets. All passenger headsets are connected
in parallel. Therefore, if a monaural headset is plugged in to a KMA 30 Stereo installation, one channel
will be shorted. Although no damage to the unit will occur, all passengers with stereo headsets will not
hear one channel, unless they switch to the “MONO” mode on their headset.

3.7.3 Intercom Modes (8)

The “ICS” pushbutton switch on the left side of the panel provides the selection of the three intercom
modes. The description of the intercom mode function is valid only when the unit is not in the "Split"
mode. Then, the pilot and copilot intercom is controlled with the Mute button.

This button cycles through the intercom modes, from top to bottom, then bottom to top as: ISO, ALL
Crew and Crew, ALL, ISO. An LED shows which mode is currently active.

ISO: The pilot is isolated from the intercom and is connected only to the aircraft radio system. He will
hear the aircraft radio reception (and sidetone during radio transmissions). Copilot will hear passengers’
intercom and entertainment, while passengers will hear copilot intercom and entertainment. Neither will
hear aircraft radio receptions or pilot transmissions. The pilot can hear music if desired. See §3.8.1

ALL: All parties will hear the aircraft radio and intercom. Crew and passengers will hear selected enter­tainment. During any radio or intercom communications, the music volume automatically decreases. The
music volume increases gradually back to the original level after communications have been completed.

CREW: Pilot and copilot are connected on one intercom channel and have exclusive access to the aircraft
radios. They may also listen to Entertainment 1. Passengers can continue to communicate with themselves
without interrupting the Crew and may listen to entertainment as configured.

3.8 Music and Music Muting (6)

The KMA 30 has two independent music inputs at the rear connector, and a front panel jack. The KMA
30 also has the ability to receive streaming music from a Bluetooth-enabled device.

Music 1 will be heard by the pilot and copilot positions. Music 1 can also be distributed to the passengers
using the Function “C” control (See § 3.11.3). The front panel jack input is treated as Music 1, and the
streamed music in the KMA 30 is also Music 1.

NOTE:

All music devices should be turned off for take off, landing, or any critical phase of flight. FAA Regula­tion 14 CFR 91.21 restricts the use of portable electronic devices.

§91.21 “(a) Except as provided in paragraph (b) of this section, no person may operate, nor may any op­erator or pilot in command of an aircraft allow the operation of, any portable electronic device on any of
the following U.S.-registered civil aircraft. . .

“(b)(5) Any other portable electronic device that the operator of the aircraft has determined will not cause
interference with the navigation or communication system of the aircraft on which it is to be used.”

You can refer to Advisory Circular 91.21-1B for more information, at http://www.faa.gov

The front panel "Mute" button has four modes, and controls the Mute function for Music 1.

The SoftMute™ circuit will cut the music out whenever there is conversation on the radio, the intercom,

Bendix/King by Honeywell

KMA 30 Audio Panel and Intercom System

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200-890-5464 Page 3-6 Rev. 1, Aug. 2012

or both, depending on the “Mute” mode selected. When that conversation stops, the music returns to the
previous level comfortably, over a second or so.

The mute mode functions are controlled through sequential pushes of the Mute button, and include an­nunciations of the mode selected.

Mode 1 - music will mute with either intercom or radio - MUTE button is lit. Voice annunciation is "mute
on."

Mode 2 - “Karaoke” mode - music will not mute except during transmissions.- MUTE LED is OFF. An­nunciation is "mute off."

Mode 3 - Radio will mute music, but intercom will not mute music - MUTE LED is OFF. Annunciation is
"radio mute."

Mode 4 - Radio will not mute music, intercom will mute music - MUTE LED is OFF. Annunciation is
"intercom mute."

♫ Music

Intercom Radio Annunciation LED

Mode 1 Muted Muted “Mute on” on

Mode 2 ♫ ♫ “Mute off” off

Mode 3 ♫ Muted “Radio mute” off

Mode 4 Muted ♫ “Intercom mute” off

Table 3-2 Mute Modes

The passenger’s intercom also has a SoftMute™ circuit. If the passengers hear the radio, or talk on the
intercom, the music will mute. If the audio panel is in CREW mode, then the radio reception will not af­fect the passenger music.

Passengers also have a Karaoke Mode. If the passengers are listening to the music 1 input or front panel
input, their Karaoke Mode is controlled by the front panel “Mute” button. If the passengers are listening
to the music 2 input, their Karaoke Mode is activated by an external switch installed either in the panel, or
connected to the AUX button logic output pin on the KMA 30.

3.8.1 Music in Pilot ISO mode

If desired, the pilot can elect to hear Music #1, in the ISO mode. While the intercom is in ISO mode, push
the Function (TEL) and ICS buttons at the same time. This mode will be indicated by the ICS ISO LED
blinking slowly (once in every 5 seconds). The pilot will now hear Music #1, and it will mute in accor­dance with the Mute mode as described in §3.8.

3.9 Telephone Mode (9)

Warning:

United States FCC Regulations contained in 47 CFR § 22.925 contain prohibition on airborne operation
of cellular telephones. “Cellular telephones installed in or carried aboard airplanes, balloons or any other
type of aircraft must not be operated while such aircraft are airborne (not touching the ground). When any
aircraft leaves the ground, all cellular telephones on board that aircraft must be turned off.”

The TEL mode serves as a full duplex interface for telephone systems such as portable cellular phones
with earpiece jacks (or Bluetooth connectivity). When interfaced with an approved airborne telecommuni­cations system, the KMA 30 can serve as an audio control and distribution center.

In ALL intercom mode, all crew and passengers will be heard on the phone when they speak. All will
hear selected audio. Com audio is automatically heard in the headsets.

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In CREW mode, the pilot and copilot are connected to the telephone. The pilot and copilot will have
transmit capability on the other selected transceiver Com 1 or 2, simply by using their respective PTT
switch.

In ISO intercom mode, when the KMA 30 is in the TEL mode, the pilot position is in the "Phone Booth."
Only the pilot will hear the telephone, and only he will be heard. He will also have access to Com 1 or 2,
and will transmit on that radio using the PTT. All selected audio is provided.

NOTE

Because the cell phone uses an intercom circuit, all stations on that circuit will lose intercom capability
when the cell phone is in use. Intercom conversations will still be present if the cell phone provides side­tone, or if the audio panel is modified for telephone sidetone.
Bendix/King does not guarantee compatibility with personal cellular telephones. .

3.9.1 Cellular telephone sidetone

As shipped from the factory, the KMA 30 does NOT provide cellular telephone sidetone (the user’s voice
fed back to the headset). Some cell phones do not provide sidetone. In the KMA 30 Telephone sidetone
can be enabled by pressing the TEL and ADF buttons for more than one second.

3.10 Utility Jack

The 2.5-millimeter (3/32”) jack on the front of the KMA 30 has three distinct functions:

 Cell phone input
 Advisory audio input
 Music input

The use of this jack is controlled by three Smart Function Keys (SFK) controlled from the front panel. See

§ 3.11 — Smart Function Keys.

3.10.1 Cellular phone

When a cellular telephone is connected to this jack using a 2.5 mm to 2.5 mm adapter cord (PS Part Num­ber 425-006-7026), the KMA 30 audio panel will connect the intercom to the cell phone when the “TEL
button is pressed (9), and behave as described in section 3.7. The telephone ringer, if present, will be
heard unless the input is muted by other radio or intercom.

3.10.2 Audio Advisory Input

The front jack can be used as a priority advisory input for auxiliary systems such as a GPS terrain advisory
or portable traffic watch system. To prevent radio or intercom from muting this input, press the “Mute”
button.

3.10.2.1 Smart Jack Function

When the KMA 30 has a signal on music #1 input coming in from the rear connector, the front panel jack
automatically becomes a Priority Advisory input, and is heard in the crew headphones.

NOTE

The front jack is no substitute for the certified installation of alerts such as the GPS waypoint or autopilot
tones. These still must be hard wired into the back by your installer. The front jack input will be muted by
radio or intercom unless music is actively playing in the rear connector. Consequently, it is possible that
an alert may be missed unless the mute mode is deselected.

3.10.3 Music Input

When used as a music input, the front panel jack is treated as Music #1. However, thanks to the function
controls, it can be distributed to all users, depending on the intercom mode. A patch cord is available with

2.5 mm to 3.5 mm (3/32 to 1/8”) adapter cord (PS Part Number 425-006-2535).

Bendix/King by Honeywell

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200-890-5464 Page 3-8 Rev. 1, Aug. 2012

3.11 Smart Function Keys (SFK)

With Virtual Tech Support, the configuration process is self-directed. SFK annunciations are heard by the
pilot and copilot positions only. SFK annunciations will be heard by the copilot, even when the audio
panel is in pilot isolate mode. These annunciations will be stopped by any audio received on the com radio
selected for transmit.

Intercom

TEL

Monitor

AUX

Music

Mute

Alternate Intercom

mode

Monitor Mode Music Distribution

State 1 State 2 State 1 State 2 State 1 State 2 State 3

“Alternate

intercom
function”

“Standard

Intercom

Function”

“Monitor

on”

“Monitor

off.”

“Standard

music

distribution”

“Alternate

music

distribution”

“Music 1 all

headsets”

Table 3-3 – Smart Function Key Functions

Figure 3-3 Smart Function Keys

These functions are non-essential and non-required and as such are only an accessory capability. They
don’t affect the audio panel’s primary function as a selector panel, aircraft intercom, or marker beacon
receiver. You can’t do anything with these buttons to prevent the KMA 30 from doing its main job.

Looking at the front panel you’ll notice that the TEL, AUX, Mute and SPR buttons have secondary func­tion assignments listed underneath the button.

To use these function keys– press and hold the desired key, “Intercom” (TEL) “Monitor” (AUX) or “Mu­sic” (MUTE) until the audio annunciation is heard, indicating the mode has changed. The SPR controls
the music 1 volume, and is discussed later.

There are multiple music sources available to the KMA 30. Music 1 input can be streamed from a Blue­tooth source, input through the front jack, OR the Music 1 input at the rear connector (Pins 23 and 24 J2).
Music 2 is wired into the rear connector, only (Pins 26 and 27, J2)

3.11.1 “Intercom” Alternate Intercom Function (A)

This function controls the distribution of aircraft radio within the intercom, as well as passenger intercom
muting, when in the “ALL” intercom mode. In the “standard intercom function” mode, aircraft radios
are distributed to all, when the intercom is in the ALL mode. In CREW mode, only the pilot and copilot
positions will hear aircraft radios.

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When “Intercom” function is toggled (hold TEL button) into “Alternate Intercom Function,” the
passengers will NOT hear aircraft radios, even in the All intercom mode. They will be able to converse
with the crew. However, when the aircraft radio becomes active, the intercom audio from the passengers is
muted, allowing the crew to focus on the radio. The passengers will still be able to talk to each other.
Pressing TEL button again switches the intercom back to “Standard Intercom Function.”

Alternate Intercom mode is announced at power up, unless the power on announcement has been defeated.

3.11.2 Monitor (B)

Pressing Monitor (AUX) will activate or deactivate the COM radio monitor function. When the Monitor
is on, the audio from the COM that is selected for reception only (only top LED illuminated) will be
muted when the radio that is selected to transmit becomes active.

This function is useful if you are copying weather from AWOS on COM 2, but have clearance delivery
tuned in on COM 1. With the monitor active, the AWOS audio will be silenced when clearance delivery
starts to speak.

To activate the Monitor function press and hold AUX, until audio announces “Monitor on,” and the same
button again to deactivate. The unit announces“Monitor off” when deactivated.

NOTE: This mode is NOT remembered through power cycles, to prevent inadvertent blocking of desired
audio on your next trip.

3.11.3 Music (C)

The Music function button (C) allows you either send the music 1 input to all intercom stations, all of the
time, or have other distribution rules apply to your music inputs.

When “Music one all headsets” is selected (press and hold Mute), music 1 (from the rear connector input,
Pins J2 23 & 24 only) will be distributed to all headsets and is independent of the intercom mode switch.
Therefore, even in the CREW mode, the passengers will hear Music 1, even though they will not hear the
intercom or radios.

This mode allows you to use a single in-flight entertainment source aboard, and to send it everywhere,
even in crew mode. The music muting will be normal, and follow the selected mode of the crew or pas­sengers.

Music function also allows you to configure your music to be either independent of the intercom mode, or
to make Music 2 dependent on the intercom mode.

When you press and hold Music (Mute) again, you’ll hear, “Alternate Music distribution.” In this case,
Music 2 will be active only when the intercom is in the CREW mode, and only the passengers will hear it.
This distribution is similar to other brands of audio panels. It allows the passengers to have their music
source come on only when they are not hearing the crew. In addition, the front panel jack input will be
distributed to the passengers in ALL and ISO mode.

Press and hold Music (Mute) again, and you will hear “Standard Music Distribution.” In this mode, Mu­sic 2 becomes active, and will always be presented to the passengers on the intercom. Music 1 is only
available to the pilot and copilot. The intercom mode switch doesn’t have any affect on the music distribu­tion.

When the music is standard, Music 1 will always go to the pilot and copilot positions, and is never heard
by the passengers. Music 2 is always heard by the passengers, and never heard by the pilot and copilot.

This mode is useful if your passengers have a different interest in entertainment or are watching a DVD,
but do not want to be excluded from the intercom conversations.

The pilot and copilot will always hear Music 1 through the unit rear connector, or a source plugged into
the front panel jack. This is present in ALL and CREW intercom modes, and available to the copilot posi­tion in ISO mode.

Bendix/King by Honeywell

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The pilot can hear this music source in ISO mode, if desired, as follows: In the ISO mode, hold the (Mu­sic) button, and press the ICS mode button for more than one second. The ICS mode LED will blink
slowly to indicate music is connected to the pilot headset, although the intercom is not.

Music 2 is provided to the passenger positions regardless of intercom mode, when the audio panel is in
Standard Music Distribution, and also in Alternate Music Distribution, but only if the intercom is in the
CREW mode. The pilot and copilot can never hear Music 2, under any condition.

If the passengers always want to hear the source in Music 1, input through the rear connector, regardless
of the intercom mode (ISO/ALL/CRW), select “Music 1 all headsets.”

If the passengers want to hear the music input through the front panel jack, the audio pane MUST be in
Alternate Music Distribution, and the intercom must be in the ALL or ISO mode.

Music Distri­bution Mode

Standard Music

Distribution

Alternate Music

Distribution

Music 1

All Headsets

Music
Source

ICS Mode

All Crew ISO All Crew ISO All Crew ISO

Front Panel

Jack

Crew Crew Copilot* Crew

&

Pass

Crew Copilot*

& Pass

Crew Crew Copilot*

Music 1 Input Crew Crew Copilot* Crew

&

Pass.

Crew Copilot*

& Pass.

Crew

&

Pass.

Crew

&

Pass.

Copilot*&

Pass.

Music 2 Input Pass. Pass. Pass. Pass.

*Pilot has Music 1 option in ISO mode

Table 3-4 Music Distribution

Alternate Music distribution modes are announced at power up, unless the power on announcement has
been defeated by holding the TEL and AUX buttons at the same time for more than two seconds. In that
case, the annunciations will not be played at unit power up.

3.11.4 Music 1 Volume

In general, we recommend adjusting the entertainment volume at the source, and only using this as a
master gain control. However, the Music 1 KMA 30 input can be adjusted from the front panel, if desired,
by pressing the combinations of keys listed.

The Music 1 volume can be adjusted from the front panel, if desired, by pressing and holding the Music
Volume (SPR) key.

Press the Music Volume (SPR) for more than one second, a beep tone will be heard, and the music vol­ume will begin to increase. To decrease the volume, release the Music Volume (SPR) button, and press
and hold again, the beep tone will occur and the volume will decrease. Continue to hold until the desired
level is reached.

Note: Since it is possible to turn the volume completely off, you may need to turn the volume up if you
don’t hear music when you expect to.

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It will take about 10 seconds to go from minimum to maximum volume.

3.11.5 Power on announcement

If the Intercom or Music Distribution is changed from the factory default, the configuration will be
played when the unit is powered up. To defeat this announcement, hold the TEL and AUX buttons when
for more than two seconds. The feature can be enabled again using the same sequence.

3.12 Bluetooth® interface

The KMA 30 has a Bluetooth interface. The audio panel is always “discoverable,” so you just need to
search for the KMA 30 from your Bluetooth-equipped phone or music source. The default access code is
0000, if needed. Once the KMA 30 has been “paired” with your Bluetooth device, the TEL distribution
will act as described in § 3.4.

You can answer a call by pushing the TEL button while it is ringing. Calls can be answered from the tele­phone handset or the audio panel. You can disconnect from either the handset or the audio panel. When a
call is disconnected or dropped, the TEL button indicator will extinguish after a few moments.

3.12.1 Pairing and unpairing Bluetooth devices

The KMA 30 can be paired with up to eight individual devices. When that number is exceeded, one device
will be automatically un-paired to allow the new device. The device eliminate will be selected at random
by the Bluetooth module. Hint, if your old phone is not recognized by the KMA 30, you may simply need
to re-pair.

3.12.1.1 Paring separate music and telephone devices

It is possible to use a different music source (iPad, iPod with Bluetooth adapter, Bluetooth enabled laptop,
etc) and telephone. However, the music source must be paired first, before the telephone, if the telephone
also has music streaming capability. Otherwise, the Smartphone will also take over the music streaming.

3.12.1.2 Changing access codes

If desired, you can change the 4-digit code needed to pair your device. Hold the button shown in the fol­lowing table, and turn the KMA 30 on. You will hear a tone indicating that the code was changed.

Hold button on power up Pairing Code

Nav 1 0000 (default)

Nav 2 1234

MKR 1111

Table 3-5 Bluetooth PIN codes

3.13 Internal Recorder and playback

The KMA 30 comes equipped with an internal recorder. This digital system stores the last incoming audio
from the radio you have selected for transmit. It can store as many of 8 incoming messages, and up to 45
seconds of audio. The pilot and copilot hear the playback. It is also possible to modify the unit to exclude
the copilot from the playback, and annunciation playback. Contact Bendix/King, for more details.

Recording is automatic. To play back the last recorded message, press and hold the COM Receive
pushbutton associated with the selected radio transmitter for about one (1) second. You can either wait for
the message to finish playing before accessing the prior message, or cancel the current playback and step
backward. To cancel the playback, press and hold the COM receive playback button for two seconds (2).
The next time the button is pressed for one (1) second, the next earlier message will be heard. The play-

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back will stop whenever there is more incoming selected com audio, and the message can be replayed
from the beginning by pressing the selected Com Receive button again for 1 second.

Figure 3-4 Playback Controls

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Section IV – Warranty

4.1 Warranty

Seller’s obligation and Buyer’s sole remedy under this warranty is repair or replacement, at Seller’s elec­tion, of any Product Nonconformance. All Products repaired or replaced are warranted only for the unex­pired portion of the original warranty period.

Seller assumes round trip shipping costs for Nonconforming Products in an amount not to exceed normal
surface shipping charges to and from Seller’s nearest warranty repair facility for such Products. The party
initiating transportation bears the risk of loss or damage to Products in transit. If Seller reasonably deter­mines, after analysis of the returned Product, that a Nonconformance does not exist, then Buyer will pay
all expenses related to the improper return including, but not limited to, analysis and shipping charges.

Seller will not be liable under this warranty for: (1) maintenance, repair, installation, handling, packaging,
transportation, storage, operation or use of Products which is improper or otherwise not in compliance with
Seller’s instruction; (2) Product alteration, modification or repair by anyone other than Seller or those spe­cifically authorized by Seller; (3) accident, contamination, foreign object damage, abuse, neglect or negli­gence after Product shipment to Buyer; (4) damage caused by failure of a Seller-supplied Product not un­der warranty or by any hardware or software not supplied by Seller; (5) use of counterfeit or replacement
parts that are neither manufactured nor approved by Seller for use in Seller-manufactured Products; (6)
products not manufactured by Honeywell (but manufacturer’s warranty is passed through to Buyer to the
extent permitted); or (7) Products normally consumed in operation or which have a normal life inherently
shorter than the foregoing warranty period including, but not limited to, consumables (e.g. flashtubes,
lamps, batteries, storage capacitors).

Seller has no obligation under this warranty unless Buyer maintains records that accurately document op­erating time, maintenance performed and the nature of the unsatisfactory condition of Seller’s Product.
Upon Seller’s request, Buyer will give Seller access to these records for substantiating warranty claims.

THESE WARRANTIES ARE EXCLUSIVE AND IN LIEU OF ALL OTHER WARRANTIES, WHETHER
WRITTEN, EXPRESS, IMPLIED, STATUTORY OR OTHERWISE, INCLUDING, BUT NOT LIMITED TO,
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR PARTICULAR PURPOSE. IN
NO EVENT WILL SELLER BE LIABLE FOR ANY INCIDENTAL, CONSEQUENTIAL, SPECIAL, OR
INDIRECT DAMAGES, EVEN IF INFORMED OF THE POSSIBILITY OF SUCH DAMAGES AND
NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY LIMITED REMEDY. NO
EXTENSION OF THIS WARRANTY WILL BE BINDING UPON SELLER UNLESS SET FORTH IN
WRITING AND SIGNED BY SELLER'S AUTHORIZED REPRESENTATIVE.

Bendix/King by Honeywell

KMA 30 Audio Panel and Intercom System

Installation and Operator’s Manual

200-890-5464 Appendix A Rev. 1, Aug. 2012

Appendix A – KMA 30 Installation Drawings

J2 J1

Viewed from Back

15
30

44

1

16
31

15
30

44

1

16
31

Ground Lug

Ground Lug
475-440-0001 (x2)

Back plate as sy

475-009-0001
ground lug (x2)

475-440-0001 (x2)
Screw w/washer

Ground lug detail

Rear plate detail (not to scale)

0.37in

3.87in

5.53in

6.04in

0.36in

0.96in

1.28in

6.31in

1.28in

Caut ion : App ly st e ad y pr es s ur e to th e bez el wh il e s cr ewin g t h e u n i t in t o t h e t r a y t o

en s ur e even s ea t i n g of t h e u n i t a n d c onn ec t or s.

Bendix/King by Honeywell

KMA 30 Audio Panel and Intercom System

Installation and Operator’s Manual

200-890-5464 Appendix B Rev.3, May 2010

Appendix B – J1 Connector Interconnect

Com 1 Audio Hi

Com 1 Mic Key

Com 1 Lo

Communications
Transceiver #1

Communications
Transceiver #2

Nav 1 Audio Hi

Nav 1 Audio Lo

VHF Nav 1

Nav 2 Audio Hi

Nav 2 Audio Lo

VHF Nav 2

DME Audio Hi

DME Audio Lo

DME Receiver

Com 2 SPR Load

Unswitched Input #1 Hi

Unswitched Aud io Lo

Unswitched Audio #1

Unswitched Input #2 Hi

Unswitched Aud io Lo

Unswitched Audio #2

Pilot M ic Audio Hi

Pilot Mic PTT

Pilot M ic Lo

36

37

38

39

MKR Ant.

1
2

RG-5 8A/U Co ax

9
10
11
12

Com 1 Mic Audio Hi

Com 2 Audio Hi

Com 2 Mic Key

Com 2 Lo

13
14
15
30

Com 2 Mic Audio Hi

17
18

19
20

21
22

Com 2 Spr Load

Com 2 Spr Load

27
28

31
32

44
43

33
34
35

Telephone

3
4
5

TEL Audio Hi

TEL M ic Audio Hi

TEL Audio Lo

ADF Audio Hi

ADF Audio Lo

ADF Receiver

7
8

Notes:

1. All shields should be grounded at audio panel only.
Other end remains floating.

2. All Power, and Ground wires shall be #22 gage wire
Lighting #22 AWG, other wires minimum #24 AWG

3. All mic and headphone jacks must be isolated from ground.

4. Speaker loads may be required on some older transceivers.
Consult manufacturer's information.
COM 2 Speaker load is the only one provided in the KMA 30.

5. All shielded wires must be MIL 22750 or 27500.

6. Unswitched inputs 1, is always presented to speaker
and crew headphones, regardless of SPR switch or PTT.

7. COM active output provides a logic low when there
is activity on COMs or other selected audio. This is used to prioritze
audio warnings in some systems.

8. No connection to pins 25, and 26

9. DME audio is passed when AUX button is pressed

10. Unswitched #3 is adjustable

11. Unswitched #2 is selectable over the speaker

Pilot PTT

See Note 4

KMA 30 Connector, J1 (Sub-D 44-pin, male on tray)

Unswitched Input #3 Hi

Unswitched Aud io Lo

Unswitched Audio #3

29

See Note 6, 10 & 11

Pass. Phones ( R)

Pass Phones (L )

Pass. Phones L o

Pass. 1 Phones Jack

Pass. 4 Pho ne s Jac k

Ext. Marker Lamp (Blue)

Ext. Marker Lamp (White)

Ext. Marker Lamp (Amber)

MM Sense Output

White Lamp Output

Blue Lamp Output

Amber Lamp

MM Sense

Ext. Marker Annunciator

Pass. 3 Pho ne s Jac k

Pass. 2 Pho ne s Jac k

24

COM Active Output

See Note 7

AUX Audio Hi
AUX Audio L o

AUX Receiver

23

41
40
42

Bendix/King by Honeywell

KMA 30 Audio Panel and Intercom System

Installation and Operator’s Manual

200-890-5464 Appendix C Rev. 1, Aug. 2012

Appendix C – J2 Connector Interconnect

22

20

31
16
1

35
36

24
23
25

4
3
2

Copilot Phones (R)

Copilot Phones (L)

Copilot Phones Lo

Pass. 1 Mic Ja ck

Pass. Mic Lo

Pass. Mic Hi

37
38

Pass. 2 Mic Ja ck

Pass. Mic Lo

Pass. Mic Hi

39
40

Pass. 3 Mic Jack

Pass. Mic Lo

Pass. Mic Hi

41
42

Pass. 4 Mic Jack

Pass. Mic Lo

Pass. Mic Hi

32
33
34

Copilot Mic Audio

Copilot PTT

Copilot Mic Lo

Copilot PTT

Copilot Mic Jack

14

13

Ent. #2 Mute

12

Playbac k

PMA8000B J2 CONNECTOR
(Sub-D 44-pin male on tray)

Ent. #2 Input

27
26
28

Ent. #2 Audio (R)

Ent. #2 Audio (L)

Ent. #2 Audio Lo

19

______ __
PA Active

Note 8

Notes:

Ent. #1 Audio (R)

Ent. #1 Audio (L)

Ent. #1 Audio Lo

Ent. #1 Input

5
6
7

Copilot PhonesJac k

Pilot Phones (R)

Pilot Phones (L)

Pilot Phones Lo

Pilot Phones Jack

8
9

Ground Lug

Airframe Ground

11-33 VDC

See Note 4

PA Mute

18

30

Speaker Hi

Speaker Lo

44
43

Swap
Switch

Swap

10
11

Cockpit Spe aker

1. All Power, and Ground wires must be #22 gage wire
Lighting #22 AWG, other wires minimum #24 AWG.

2. All shields should be grounded at audio panel only,
other end remains floating

3. Pins 8 and 9 connected through a 5 A breaker.

4. PA Mute is a TTL level logic output that is pulled
low when radio PTT active, for external systems.

5. All shielded wires must be MIL 22750 or 27500.

6. Optional switch to remotely activate playback

7. For music distribution information, see Section 2.5.1.

8. Pin 19 is pulled to ground when the PA mode is activated,
and pilot PTT active, for speaker relay control.
See Sect 2.4.11.

9. AUX enable goes low when AUX button is on. May be used for
passenger mute inhibit by connection to pin 13
Should NOT be used when DME is installed and
activated with AUX button.

10. Reserved

11. No connection to Pin 17, 29, 30

12. Use care when connecting music signal and ground inputs.
Refer to section 2.4.1.1 for more information.
Failure to properly interface music can result in
added noise.

13. Unswitched 4 audio low connected where
convenient, but should NOT go to ent. low

Unswitched Input #4 Hi

Unswitched Audio Lo

Unswitche d Audio #4

15

See Note 9

7
6
5

28 V Lights Hi

28-Volt lights lo

7
6
5

14 V Lights Hi

14-Volt lights lo

AUX Enable

See Note 9

5A Breake r
See Note 3

Note 6

Note 12

Note 13

Lighting
See Sect. 2.4.9

Lighting See Sect. 2.4.9

Bendix/King by Honeywell

KMA 30 Audio Panel and Intercom System

Installation and Operator’s Manual

200-890-5464 Appendix D Rev. 1, Aug. 2012

Appendix D – Instructions for FAA Form 337 and continuing
airworthiness

8.1 Instructions for FAA Form 337, Audio Panels

One method of airworthiness approval is through an FAA Form 337, Major Repair and Alteration (Airframe, Power­plant, Propeller, or Appliance) In the case of the KMA 30, you may use the following text as a guide.

Installed audio selector and 6-place intercom, Bendix/King KMA 30, part number 050-890-(XXXX) in ( lo­cation ) at station . Installed per AC43.13-2, Chapter 2, paragraph 23 (Instrument Panel Mounting).

Installed per Bendix/King Installation Operators Manual p/n 200-890-(XXXX), revision (), dated ( ).

These units are FAA-Approved under TSO C50c for audio amplifiers, and/or TSO C35d for Marker Beacon
Receivers, and meets appropriate environmental qualifications outlined in RTCA DO-160D as appropriate or
this aircraft.

Interface to existing aircraft radios in accordance with installation manual and in compliance with practices
listed in AC43.13-2, Chapter 2. All wires are Mil-Spec 22759 or 27500. Connection to aircraft dimmer bus is
____________________. Power is supplied to the unit through a 3A circuit breaker (type and part number),
and total electrical load does not exceed % of the electrical system capacity with the KMA 30 added.

Aircraft equipment list, weights and balance amended. Compass compensation checked. A copy of the opera­tion instructions, contained in Bendix/King document 202-890-( ), revision ( ), dated ( ), is placed in the air­craft records. All work accomplished listed on Work Order .

8.2 Instructions for Continuing Airworthiness, Audio System

Sample ICA Checklist for Bendix/King Audio System:

Section Item Information

1 Introduction Installation of Audio Panel with integrated marker beacon receiver and inter-

communications system.

2 Description Installation as described in manufacturer’s installation manual referenced on

FAA Form 337, including interface with other avionics audio as required.
3 Controls See installation and operator’s guide referenced on FAA Form 337.
4 Servicing None Required
5 Maintenance Instructions On Condition, no special instructions
6 Troubleshooting In the event of a unit problem, place the unit into “off,” “fail-safe” and/or

“emergency” mode. This allows pilot communications using COM 1. Follow

checkout instructions in the installation manual referenced on the FAA Form

337. For a specific unit fault, contact the manufacturer at [phone] for

special instructions.
7 Removal and replacement informa-

tion

Removal: Using a 3/32” Allen-head wrench, carefully unscrew the locking

screw located in the center of the unit. While turning the wrench CCW, gently

pull on the EDGES of the bezel until the unit is free from the mounting tray.

Installation: Engage the locking screw at the back. Turn the locking screw CW,

while applying slight pressure to the edges of the bezel. Do not over tighten!
8 Diagrams Not applicable
9 Special Inspection Requirements Not Applicable
10 Protective Treatments Not Applicable
11 Structural Data Not Applicable
12 Special Tools None
13 Not Applicable Not Applicable
14 Recommended Overhaul Periods None
15 Airworthiness Limitations Not Applicable
16 Revision To be determined by installer

Bendix/King by Honeywell

KMA 30 Audio Panel and Intercom System

Installation and Operator’s Manual

200-890-5464 Appendix E Rev. 1, Aug. 2012

Appendix E – RTCA DO160D Environmental Qualification
Form

Audio Selector Panel/Intercom/Marker Beacon Receiver

Part Number: 050-890-( )

FAA TSO Number: C50c, C35d

Manufacturer: Bendix/King Incorporated 9800 Martel Road Lenoir City TN 37772

Conditions Section Conducted Tests

Temperature and Altitude
Low Temperature
High Temperature
In-flight Loss of Cooling
Altitude
Decompression
Overpressure

4.0

4.5.1

4.5.2

4.5.4

4.6.1

4.6.2

4.6.3

Equipment tested to CAT A1 & D1

-55° C Survival, -15°C Low Operating (A1)
+85°C Survival, +70°C High Short Time Operating
Not Applicable, no cooling required
50,000’ unpressurized (D1)
Not Applicable
Not Applicable

Temperature variation 5.2 Equipment tested to Category C
Humidity 6.0 Equipment tested to Category A
Shock 7.0 Equipment tested to Operational test only
Operational 7.2 Equipment tested to Operational test only
Crash Safety 7.3 Equipment tested to Operational test only
Vibration 8.0 Equipment tested to Category M & N
Explosion 9.0 Category X, not tested
Waterproofness 10.0 Category X, not tested
Fluids Susceptibility 11.0 Category X, not tested
Sand and Dust 12.0 Category X, not tested
Fungus 13.0 Category X, not tested
Salt Spray 14.0 Category X, not tested
Magnetic Effect 15.0 Equipment tested to Category Z
Power input 16.0 Equipment tested to Category B
Voltage Spike 17.0 Equipment tested to Category A
Audio Frequency Susceptibility 18.0 Equipment tested to Category B
Induced Frequency Susceptibility 19.0 Equipment tested to Category A
Radio Frequency Susceptibility 20.0 Equipment tested to Category T
Radio Frequency Emission 21.0 Equipment tested to Category B
Lightning Induced Transient
Susceptibility

22.0 Equipment tested to Category XXE2

Lightning Direct Effects 23.0 Category X, not tested
Icing 24.0 Category X, not tested
ESD 25.0 Category X, not tested