This product is now licensed to Anodyne Electronics Manufacturing (AEM) from Northern
Airborne Technology (NAT). AEM is responsible for all matters related to this product, including
sales, support and repair services.
Please note the transition to convert product manuals and supporting documentation is an
ongoing process and is being addressed on an ‘as needed’ basis.
All references to NAT product part numbers (and associated images) are equivalent to AEM
product part numbers.
laws. No part of this document may be reproduced or transmitted in any form or
by any means including electronic, mechanical, photocopying, recording, or
otherwise, without the prior written permission of AEM.
Installation and Operation Manual Page ii
ENG-FORM: 820-0100.DOTX
CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRONICS MANUFACTURING CORP.
AA31 ICS Mode Controller
Prepared By:
Checked By:
Approved By:
AEM MANUAL REVISIONS
Section
Revision Number
Revision Description
Date
Updated
, 2012
A
SM10 Installation and Operation Manual
Tony Pearson
Designer
pr 14, 2012
Loen Clement
Designer
May 24/12
Tom Betzelt
Product Support
Manager
May 28, 2012
The status of this installation a nd operation manual is c ontrolled by issue shown on t he title page. The
status of each section is controlled by revision shown in the footer of each page. All revisions affecting
sections of this manual have been incorporated into the latest issue.
AllRev: 5.00
drawings and templateApril 14
Installation and Operation Manual Page iii
ENG-FORM: 820-0100.DOTX
CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRONICS MANUFACTURING CORP.
AA31 ICS Mode Controller
SM10 Installation and Operation Manual
Table of Contents
Section Title Page
1.0Description
1.1Introduction 1-1
1.2Purpose of Equipment 1-1
1.3Features 1-1
1.4Specifications 1-2
1.4.1 Electrical Specifications 1-2
1.4.2 Physical Specifications 1-2
1.4.3 Environmental Specifications 1-3
1.5Unit Nomenclature 1-3
2.0Installation
2.1Introduction 2-1
2.2Unpacking and Inspection 2-1
2.2.1 Warranty 2-1
2.3Installation Procedures 2-1
2.3.1 Warnings 2-1
2.3.2 Cautions 2-1
2.3.3 Cabling and Wiring 2-1
2.3.4 Notes 2-2
2.3.5 External Switches and Lamps 2-2
2.3.6 Post-Installation Checks 2-2
2.4Continued Airworthiness 2-3
2.5Accessories Required But Not Supplied 2-3
2.6Installation Drawings 2-4
3.0Operation
3.1Introduction 3-1
3.2General 3-1
3.3Operation Specifics 3-1
3.3.1 Intercom Function Selector 3-1
3.3.2 Annunciators 3-2
Installation and Operation Manual Page iv
ENG-FORM: 820-0100.DOTX
CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRONICS MANUFACTURING CORP.
AA31 ICS Mode Controller
SM10 Installation and Operation Manual
Section 1.0 Description
1.1 Introduction
This manual contains information on the AA31-001 and AA31-002 ICS Mode Controllers . All derivative
products will be covered by manual supplements, which can be obtained from AEM as required.
Information in this section consists of purpose of equipment, features and specifications.
1.2 Purpose of Equipment
The AA31 I CS Mode Controller provides a convenient, centralized method of organizing the aircraft audio
system into multiple intercom circuits for independent or common operation. This function is especially
valuable for EMS and law enforcement applications, where several independent operations occur within the
aircraft that often require isolation from each other, while retaining the ability to share common communication.
The AA31 can provide ICS switching for three or four AEM Audio Controllers, or other AEM products
incorporating an ICS TIE LINE. The AA31 also has provisions for driving external annunciators and interfacing
for ICS Calling.
1.3 Features
Front panel annunciators provide positive indication of the ICS mode selection. The LED on the right of
the ICS Function Knob lights green to indicate ICS Function is ALL COMMON. The LED on the left of the
ICS Function Knob lights amber to indicate that any of the ICS functions are in the ISO (isolated) position.
The AA31 has four annunciator outputs, one output for each ICS Function. The outputs on the AA31-002
can drive the Isolated Warning inputs on an AEM Audio Controller. The outputs on the AA31-001 and
AA31-002 can drive external lamps.
The AA31 provides load matching so that the ICS Levels will not change as the ICS Function is changed.
When the AA31 isolates an Audio Controller’s ICS Tie Line, it connects a resistor, equal to the load of the
ICS Tie Line, in place of the isolated Audio Controller.
The REAR CALL annunciators illuminate when a rear call signal is activated.
ICS Function switching is a passive circuit, so it will continue to operate with no power to the AA31. The
annunciators and outputs will fail without power.
April 14, 2012 Rev: 5.00 Page 1-1
ENG-FORM: 800-0100.DOTX
CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRONICS MANUFACTURING CORP.
AA31 ICS Mode Controller
SM10 Installation and Operation Manual
1.4 Specifications
1.4.1 Electrical Specifications
Input Power +28 Vdc
Power Requirements
Nominal 155 mA max @ +27.5 Vdc
Lighting 80 mA max @ +27.5 Vdc
Annunciators
REAR CALL (left) Amber (dimming)
REAR CALL (right) Amber (dimming)
ISO Amber (dimming)
COMMON Green (dimming)
Circuitry Type Tie Lines are single ended
Output Signals
Quantity 4 ICS Tie Lines,
2 Rear Call Lines,
4 Mode Annunciator Lines
Circuitry Type Tie Lines are single ended.
ICS Function Outputs (4) All ISO, REAR ISO, PILOT ISO, ALL COMMON.
AA31-001 Source 100 mA Max
AA31-002 Open Collector Output Sink 100 mA Max
1.4.2 Physical Specifications
Height 1.13" (28.7 mm) max.
Depth 2.82” (71.61 mm) behind pa nel
Width 4.90" (124.5 mm) behind panel
5.75” (146.1 mm) in front of panel
Weight 0.50 lbs (225 g)
Mounting Panel mount Dzus rail (4 fasteners)
Faceplate Engraved acrylic edge lit panel.
Connectors Male 25-pin D-sub with jack screw fasteners
Material/Finish Chassis & cover are 5032-H32 brushed aluminum with
conversion coating finish
April 14, 2012 Rev: 5.00 Page 1-2
ENG-FORM: 800-0100.DOTX
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AA31 ICS Mode Controller
SM10 Installation and Operation Manual
1.4.3 Environmental Specifications
Temperature: -40q C. to +55q C (normal)
-55q C. to + 85q C (survival)
Altitude 25,000 feet (7, 620 m)
Humidity 95% for 48 hours
Shock 6 g for 11 ms
Qualification
DO-160C Env. Cat. B4-BA[MN]XXXXXXXXXXXXXXXX
1.5 Unit Nomenclature
Other variants are available; please contact AEM f or further information.
AA31-001 Mode selector for organizing multiple ICS circuits
Visual LED annunciation of mode status
External annunciation – 100mA max @ 28 Vdc
Two rear call annunciators with separate circuits
28 Vdc backlighting
Provides voltage for external annunciation
AA31-002 Mode selector for organizing multiple ICS circuits
Visual LED annunciation of mode status
External annunciation – 100mA max @ 28 Vdc
Two rear call annunciators with separate circuits
28 Vdc backlighting
Provides switched grounds for external annunciation
End of Section 1.0
April 14, 2012 Rev: 5.00 Page 1-3
ENG-FORM: 800-0100.DOTX
CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRONICS MANUFACTURING CORP.
AA31 ICS Mode Controller
SM10 Installation and Operation Manual
Section 2.0 Installation
2.1 Introduction
Information in this section consists of: unpacking and inspection procedures, installation procedures,
post-installation checks, and installation drawings.
2.2 Unpacking and Inspection
Unpack the equipment carefully. Inspect the unit visually for damage due to shipping and report all such
claims immediately to the carrier involved. Note that each unit should have the following:
- AA31 ICS Mode Controller
- Product Information Card
- Release certification
Verify that all items are present before proceeding and report any shortage immediately to your supplier.
2.2.1 Warranty
All Anodyne Electronics Manufacturing Corp. (AEM) products are warranted for 2 years. See the website
www.aem-corp.com/warranty for complete details.
2.3 Installation Procedures
2.3.1 Warnings
Do not bundle any lines from this unit with transmitter coax lines. Do not bundle any logic, audio, or DC
power lines from this unit with 400 Hz synchro wiring or AC power lines. Do not position this unit next to
any device with a strong alternating magnetic field such as an inverter, or significant audio interference
will result.
2.3.2 Cautions
In all installations, use shielded cable exactly as shown and ground as indicated. Significant problems
may result from not following these guidelines.
2.3.3 Cabling and Wiring
All unshielded wire shall be selected in accordance with AC43.13-1B Change 1, Paragraphs 11-76
through 11-78. Wire types should be to MIL-W-22759 as specified in AC43.13-1B Change 1, Paragraphs
11-85, 11-86, and listed in Table 11-11. For shielded wire applications, use Tefzel MIL-C-27500 shielded
wire with solder sleeves (for shield terminations) to make the most compact and easily terminated
interconnect. Follow the wiring diagrams in Section 2.6 as required.
April 14, 2012 Rev: 5.00 Page 2-1
ENG-FORM: 805-0100.DOTX
CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRONICS MANUFACTURING CORP.
AA31 ICS Mode Controller
SM10 Installation and Operation Manual
Allow 3 inches from the end of the wire to the shield termination to allow the hood to be easily installed.
Note that the hood is a ‘clamshell’ hood, and is installed after the wiring is complete.
All wiring should be at least 22 AWG, except power and ground lines, which should be at least 20 AWG.
Ensure that all ground connections are clean and well secured.
2.3.4 Notes
All Audio Controllers used with the AA31 must have the ICS Tie and Gain Modifications installed. This
will only be a concern on Audio Controllers prior to s/n 1918.
Power for the AA31 may be sourced from a dedicated ½ Amp protection device, or from the protection
device that provides power to the primary Audio Controller. Observe proper wire size selection in the
case of the latter.
Any Audio Controllers wired as 'Rear' Controllers have their ICS tie lines permanently connected together.
2.3.5 External Switches and Lamps
The Rear Call Switches are generally momentary, push button switches that are used to activate the ICS
Call LED's associated with the AA31. These switches can be individual items supplied by the installing
agency, or an integral part of the Audio Controllers in the aircraft.
The AA31 provides outputs to drive external lamps/annunciators to indicate the position of the ICS
Function Selector switch. These annunciators can be individual items supplied by the installing agency,
or an integral part of the Audio Controllers in the aircraft. In most cases, the various outputs are tied
together at the AA31 and used to drive a single ‘isolated’ annunciator.
2.3.6 Post-Installation Checks
If any preset requires adjustment, be sure this is carried out before the aircraft leaves, and that the unit
and its mating connector are secured before departure. Make all required log book entries, electrical
load, weight and balance amendments and other paperwork as required by your local regulatory agency.
2.3.6.1 Voltage/Resistance Checks
Do not attach the AA31 until the following conditions are met.
Check the following:
a) P101 pin <1> for +28 Vdc relative to ground.
b) P101 pin <14> for continuity to ground (less than 0.5 ).
In an Intercom System with four Audio Controllers, check for continuity between Terminations 1, 2 and 3.
Pins <7> to <19>, Pins <8> to <20>, and Pins <9> to <21> should measure less than 1 .
April 14, 2012 Rev: 5.00 Page 2-2
ENG-FORM: 805- 0100. DOTX
CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRONICS MANUFACTURING CORP.
AA31 ICS Mode Controller
SM10 Installation and Operation Manual
2.3.6.2 Power On Checks
Power up the audio system with the AA31 installed. Verify that the ISO (amber) and COMMON (green)
LEDs light as the ICS Function Knob is rotated from the ALL COMMON position to the isolated positions.
Verify that the ICS Function Outputs are correctly driving their external annunciators, if installed.
Ensure that the REAR CALL annunciators on the front panel of the AA31 are operating correctly if
external switches for this function are installed.
Check that turning on the panel lights will backlight the AA31 faceplate and will dim the faceplate
annunciators.
Verify that ICS Audio is being switched between Audio Controllers as the ICS Function Knob is rotated.
Ensure that the ICS Audio level is consistent at each Audio Controller as the ICS function knob is rotated.
Upon satisfactory completion of all performance checks, make the required log entries and
complete the necessary Regulatory Agency paperwork before releasing the aircraft for service.
2.4 Continued Airworthiness
Maintenance of the AA31 is ‘on condition’ only. Periodic maintenance of this product is not required.
2.5 Accessories Required Bu t Not Supplied
Installation kit p/n AA31-IKC (crimp) is required to complete the installation. The kit consists of the
following:
CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRONICS MANUFACTURING CORP.
AA31 ICS Mode Controller
DRAWING
REV.
DESCRIPTION
TYPE
AA31-001
AA31\001\403-0
1.01
ICS Mode Controller
Interconnect
AA31\001\405-0
1.01
ICS Mode Controller
Connector Map
AA31\001\905-0
1.10
ICS Mode Controller (Sheet 1 of 2)
Faceplate
AA31\001\922-0
1.10
ICS Mode Controller
Mechanical Installation
AA31-002
AA31\002\403-0
1.01
ICS Mode Controller
Interconnect
AA31\002\405-0
1.01
ICS Mode Controller
Connector Map
AA31\002\905-0
2.00
ICS Mode Controller (Sheet 1 of 3)
Faceplate
AA31\002\922-0
2.00
ICS Mode Controller
Mechanical Installation
SM10 Installation and Operation Manual
2.6 Installation Drawings
Section 2.0 ends following the above documents
April 14, 2012 Rev: 5.00 Page 2-4
ENG-FORM: 805- 0100. DOTX
CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRONICS MANUFACTURING CORP.
AA31
AA31
AA31
REAR
REAR
REAR
CALL
CALL
CALL
2.00
RAS#33 - CHANGED TO AEM LOGO, UPDATED HOLE SCHEDULE.
REAR ISOPILOT ISO
PILOT ISO
ALL ISO
ALL ISO
ALL ISO
INTERCOM FUNCTION
INTERCOM FUNCTION
INTERCOM FUNCTION
REAR ISOPILOT ISO
REAR ISO
ALL COMMON
ALL COMMON
ALL COMMON
REAR
REAR
REAR
CALL
CALL
CALL
13-Dec-11MWS
Dec 21/11
21 Dec. 11
ICS MODE CONTROLLER
SIZE
A
L9015
1:11 of 3
AA31-002
905-0
KELOWNA BC CANADA
WWW.AEM-CORP.COM
SHEET
(250)-763-1088
REV
2.00
EST.461.81
2.46 62.5 EST.
4.90
124.5
PRODUCT LABEL
71.12.80
REV
DESCR
2.00 RAS#33 - UPDATED TO AEM FORMAT.04-Jan-12
DATEREVBY
MWS
REAR
AA31
CALL
1.12 28.3
CENTER OF GRAVITY
WEIGHT: 0.50 lbs. (0.225Kg)
PILOT ISO
ALL ISO
INTERCOM FUNCTION
DRAWN
CHECKED
APPROVED
CONFIDENTIAL AND PROPRIE TARY
THE INFORMATION CONTAINED IN THIS
DRAWING IS THE SOLE PROPERTY OF
ANODYNE ELECTRONICS MANUFACTURING.
ANY REPRODUCTION IN PART OR AS A WHOLE
WITHOUT THE WRITTEN PERMISSION OF
ANODYNE ELECTRONICS MANUFACTURING IS
REAR ISO
ALL COMMON
NAMEDATE
TGM
PROHIBITED.
REAR
CALL
JAN 25/99
Jan 19/12
Jan 19/12
UNLESS OTHERWISE SPECIFIED:
DIMENSIONS ARE IN INCHES
TOLERANCES:
FRACTIONAL
ANGULAR: MACH
TWO PLACE DECIMAL
THREE PLACE DECIMAL
INTERPRET GEOMETRIC
TOLERANCING PER:
MATERIAL
0.5 Deg
BEND
0.01
0.005
N/A
FINISH
N/A
DO NOT SCALE DRAWING
0.95±0.02
TITLE:
SIZE
A
SCALE: 2:3
24.1±0.5
ICS MODE CONTROLLER
CAGE CODE
L9015
DRAWING No.:
0.60 15.2 EST.
3.95±0.05 100.3±1.35.75 146.1
15-1925 KIRSCHNER RD.
KELOWNA BC V1Y 4N7
(250)-763-1088
WWW.AEM-CORP.COM
REVPART No.
922-0
AA31-002
SHEET 1 OF 1
2.00
AA31 ICS Mode Controller
REAR CALL LEFTISOALL COMMONREAR CALL RIGHT
Annunciator Annunciator AnnunciatorAnnunciator
SM10 Installation and Operation Manual
Section 3.0 Operation
3.1 Introduction
Information in this section consists of the functional and operational procedures for the AA31 ICS Mode
Controller.
3.2 General
The AA31 ICS Mode Contr oller prov ides a c onvenient, ce ntralized m ethod of organizing the aircraft audio
system into multiple i ntercom circuits for independent or com mon operation. This func tion is especially
valuable for EMS and law enforcement applications, where several indepen dent operations occur within
the aircraft that often require isolation from each other, while retaining the ability to share common
communication.
3.3 Operation Specifics
Intercom Function Selector
3.3.1 Intercom Function Selector
The Intercom Function selector is a rotary 4-position switch that is used to select ‘talk groups’ for intercom
(ICS).
Select ing A LL IS O is ola tes a ll IC S po sit ions from eac h ot her . The I CS t ie li nes of th e Pil ot Au dio C on tro ller, Co pilot Aud io Controller, and the Rear Audio C ontroller(s ) are not connect ed, but the ICS ti e lines of both Rear
Audio Controllers remain connected t ogether.
Selecting PILOT ISO isolates the pilot f rom all other p ositions . The Pilot Audio Controller is n ot c on nec te d
to the ICS tie line of any other Audio Controller, but the ICS tie line of the Co-pilot Audio Controller is
connected to the ICS tie line of the Rear Audio Controller(s).
April 14, 2012 Rev: 5.00 Page 3-1
ENG-FORM: 806-0100.DOTX
CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRONICS MANUFACTURING CORP.
AA31 ICS Mode Controller
SM10 Installation and Operation Manual
Selecting REAR ISO iso lates the Pilot and Co -pilo t from the R ear positi on(s). Th e ICS tie li nes of the Pilot
and Co-pilot Audio Contr ollers are connecte d together, but there is no conn ection bet ween the Fr ont (Pilot
or Co-pilot) and Rear Audio Controller(s).
Selecting ALL COMMON connects all ICS positions t o each other. All Audio Controller ICS tie lines are
connected together.
3.3.2 Annunciators
The annunciators are LEDs that illuminate to indicate the current call or isolation status of the unit.
The REAR CALL left annunciator illuminates amber when a REAR CALL LEFT signal is activated.
The ISO Annunciator il luminates amber when any ICS ‘Isolate’ condition (ALL ISO, PILOT ISO or REAR
ISO) is selected on the intercom function selector.
The ALL COMMON annun ciator illuminates green when ALL COMMON (no iso lation) is selected on the
intercom function selector.
The REAR CALL right annunciator illuminates amber when a REAR CALL RIGHT signal is activated.
End of section 3.0
April 14, 2012 Rev: 5.00 Page 3-2
ENG-FORM: 806-0100.DOTX
CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRONICS MANUFACTURING CORP.
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