Nat RM01-001 User manual

Northern Airborne Technology Ltd.
1925 Kirschner Road
Kelowna, BC, Canada.
V1Y 4N7
Telephone [phone]
Facsimile [phone]
Issued on the authority of Northern Airborne Technology Ltd.
Copyright 2009
Installation and Operation Manual
RM01-001
Remote Memory
SM77
ISSUE 1.01
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Prepared By: J NAT]
226
•
:*:nat
•
RM01-001 Remote Memory
SM77 Installation and Operation Manual
DEStatiD.
DE
03
Approved Bye@:
NAT
117
The status of this installation and operation manual is controlled by issue shown on the title page. The
status of each section is controlled by revision shown
in the footer of each page. Ali revisions affecting
sections of this manual have been incorporated into the latest issue.
ISSUE/REVISION RECORD
Manuallssue Section
Nu
rn ber Revision Number
1.01 Section 1 Rev:
1.01
1.00 Section 1 Rev: 1.00
Section 2 Rev: 1.00
Section 3 Rev: 1.00
Installation and Operation Manual
ENG-FORM: 820-0114.DOT
Revision Description
ETSO Changes
Initial release
Issue Date
Sep 3, 2009
Apr29,2009
Page ii
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
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RM01-001 Remote Memory
SM77 Installation and Operation Manual
Installation and Operation Manual Page iii
ENG-FORM: 820-0114.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
Table of Contents
Section Title Page
1. Description
1.1 Introduction 1-1
1.2 Product Description 1-1
1.3 Design Features 1-1
1.4 Specifications 1-2
1.4.1 Electrical Specifications 1-2
1.4.2 Physical Specifications 1-2
1.4.3 Environmental Specifications 1-2
1.4.4 Product Approval 1-3
2. Installation
2.1 Introduction 2-1
2.2 Unpacking and Inspection 2-1
2.2.1 Warranty 2-1
2.3 Continued Airworthiness 2-1
2.4 Installation Procedures 2-1
2.4.1 Warnings 2-1
2.4.2 Cautions 2-2
2.4.3 Cabling and Wiring 2-2
2.4.4 Mounting 2-2
2.4.5 Post-Installation Checks 2-3
2.5 Adjustments and Connections 2-3
2.6 Accessories Required But Not Supplied 2-3
2.7 Installation Drawings 2-4
3. Operation
3.1 Introduction 3-1
3.2 General Information 3-1
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RM01-001 Remote Memory
SM77 Installation and Operation Manual
Section 1 Rev: 1.01 Issue 1 Page 1-1
ENG-FORM: 800-0115.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
Section 1 Description
1.1 Introduction
Information in this section consists of product description, design features and specifications for the
RM01-001 Remote Memory (RM01). The RM01 has been developed for use in the Northern Airborne
Technology Ltd (NAT) Digital Audio Communication System (DACS) but can be used in other applications
as appropriate. All derivative product information shall be contained in the applicable manual
supplement, which may be obtained from Northern Airborne Technology Ltd as required.
Review all notes, warnings and cautions.
Note: This manual contains information applicable to units s/n 3000 and above. For information
applicable to units below s/n 3000 contact the product support department at Northern Airborne
Technology Ltd.
1.2 Product Description
The RM01 is a Remote Memory unit for the Northern Airborne Technology Ltd. (NAT) Digital Audio
Communication System (DACS).
The DACS is a communications management system that distributes and controls all of the audio in an
aircraft. It manages the audio from all transceivers, receivers and audio warning sources. It enables the
transmission of microphone audio to a selected transmitter and distributes all Inter-Communication
System (ICS) audio.
The RM01 is a remote mounted device that connects to the DACS AMU50 Audio Management Unit. The
RM01 stores the system’s configuration and aural alert files. Storing the system configuration and alert
files in this unit enables the replacement of the AMU50 without the need of downloading a new
configuration file.
The RM01 communicates with the AMU50 over a Serial Peripheral Interface (SPI) port. The RM01 also
receives regulated power from the AMU50.
1.3 Design Features
The RM01 provides digital memory accessible via a serial communications port to service an externally
attached device such as an Audio Management Unit. A Typical application of the RM01 would be to store
system configuration data or digital audio data.
The RM01 provides 64 Mbits of data storage capacity, which supports at least 120 seconds of 16 bit
digital audio data (32 kHz sampled).
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RM01-001 Remote Memory
SM77 Installation and Operation Manual
Section 1 Rev: 1.01 Issue 1 Page 1-2
ENG-FORM: 800-0115.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
1.4 Specifications
1.4.1 Electrical Specifications
Input Signals
Input Operating Voltage
The RM01 requires a conditioned +5 Vdc power supply such as that provided by an
AMU50.
Nominal Operating Input Voltage 5.0 Vdc
Maximum Current: 0.1 A @ 5.0 Vdc
Communication
The RM01 communicates over a Serial Peripheral Interface (SPI) with an external device
such as an AMU50.
1.4.2 Physical Specifications
Height 18.4 mm (0.73 in) maximum
Depth 51.4 mm (2.03 in) maximum
Width 57.2 mm (2.25 in) maximum
Weight 0.04kg(0.09lbs)maximum
Material and Finish Brushed aluminium, conversion coated
Connectors One 9 pin D-sub (male), Jackpost locking hardware
Installation SPI Cable: 0.3 m (11.81 in) maximum
Installation Kit: RM01-IKC
Mounting Bulkhead Mount (four 6-32 screws)
1.4.3 Environmental Specifications
The RM01 has been tested to the environmental conditions listed below. Environmental categories for
which TSO compliance has been demonstrated are listed on the Environmental Qualification Form in
Section 2 of this manual.
Temperature -40 to +70°C (operating)
-45 and +85°C (short-time operating)
-55 to +85°C (ground survival)
Altitude 50,000 feet maximum
Humidity 95 % non-condensing
Shock Operational shock; 6 g for 11 ms
Crash safety (impulse); 20 g for 11 ms
Crash safety (sustained); 20 g for 3 s
Vibration RTCA/DO-160E Section 8 Categories (SBM) (U2FF1)
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RM01-001 Remote Memory
SM77 Installation and Operation Manual
Section 1 Rev: 1.01 Issue 1 Page 1-3
ENG-FORM: 800-0115.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
1.4.4 Product Approval
1.4.4.1 FAA: TSO-C139
When installed as part of the Northern Airborne Technology Ltd DACS:
FAA: TSO-C139 (RTCA/DO-214 Class Ib, RTCA/DO-160E, RTCA/DO-178B Level C)
Refer to SM76 AMU50-001 Audio Management Unit Installation and Operation manual for further
installation compliance details.
1.4.4.2 EASA: ETSO-C50c
When installed as part of the Northern Airborne Technology Ltd DACS:
EASA: ETSO-C50c (RTCA/DO-214 Class Ib, RTCA/DO-160E, RTCA/DO-178B level C)
Refer to SM76 AMU50-001 Audio Management Unit Installation and Operation manual for further
installation compliance details.
Section 1 ends
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RM01-001 Remote Memory
SM77 Installation and Operation Manual
Section 2 Rev: 1.00 Issue 1 Page 2-1
ENG-FORM: 805-0115.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
Section 2 Installation
2.1 Introduction
Information in this section consists of unpacking and inspection procedures, installation procedures, post-
installation checks and installation drawings for the RM01-001 Remote Memory (RM01).
Review all notes, warnings and cautions.
2.2 Unpacking and Inspection
Unpack the equipment carefully and locate the warranty card. Inspect the unit visually for damage due to
shipping and report all such claims immediately to the carrier involved. Check that all items listed below
are present before proceeding and report any shortage immediately to your supplier:
- Warranty Card
- Certificate of Conformity or Release Certification
2.2.1 Warranty
All Northern Airborne Technology Ltd. products are warranted for 2 years from date of installation by an
authorized NAT dealer, to be free of defects in workmanship or performance. This warranty covers all
materials and labour, but is exclusive of any transport to deliver the defective unit to and from NAT or its
designated warranty repair center, or any labour to remove or re-install the defective unit in the aircraft.
Contact NAT for any questions regarding this warranty, its applicability to your units and/or for return
authorization. NAT is the final arbitrator concerning warranty administration. Units which have been
physically damaged, burned, immersed in water or otherwise abused beyond the scope of normal use will
not be considered for warranty. WARRANTY IS VOID UNLESS THE PRODUCT IS INSTALLED BY AN
AUTHORIZED NAT DEALER. Product for which a warranty card is not returned shall be warranted from
date of manufacture.
2.3 Continued Airworthiness
Maintenance of the RM01 Remote Memory is ‘on condition’ only. Periodic maintenance of this product is
not required.
2.4 Installation Procedures
2.4.1 Warnings
Not Applicable.
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RM01-001 Remote Memory
SM77 Installation and Operation Manual
Section 2 Rev: 1.00 Issue 1 Page 2-2
ENG-FORM: 805-0115.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
2.4.2 Cautions
CAUTION:
Do not bundle any lines from this unit with transmitter coax feed 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, motor or blower, or
significant audio interference will result.
In all installations, use shielded cable exactly as shown, and ground only as
indicated. Significant problems may result from not following these guidelines.
Failure to follow the installation and wiring instructions provided in this manual
for power and ground connections, including the rating of the circuit breaker,
may lead to damage in the power input circuitry of the unit.
2.4.3 Cabling and Wiring
All wire shall be selected in accordance with the original aircraft manufacturer's Maintenance Instructions
or AC43.13-1B Change 1, Paragraphs 11-76 through 11-78. Unshielded wire types shall qualify 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 connector map in
Section 2.7 as required.
Allow 3" from the end of the shielded wiring to the shield termination to allow the connector hood to be
easily installed. Reference the interconnect drawing in Section 2.7 for shield termination details. Note that
the hood is a "clamshell" hood, and is installed after the wiring is complete.
Maintain wire segregation and route wiring in accordance with the original aircraft manufacturers
Maintenance Instructions.
Unless otherwise noted, all wiring shall be a minimum of 22 AWG. Refer to the interconnect drawing for
additional specifications. Check that the ground connection is clean and well secured, and that it shares
no path with any electrically noisy aircraft accessories such as blowers, turn and bank instruments or
similar loads.
2.4.4 Mounting
The RM01 can be bulkhead-mounted in any orientation, using four 6-32 screws. No shock or vibration
isolators are required.
The RM01 must be mounted to a clean metal surface which is electrically bonded to the aircraft ground
plane. The unit is finished with a coating that prevents corrosion. This coating is electrically conductive
and should not be removed for electrical bonding.
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RM01-001 Remote Memory
SM77 Installation and Operation Manual
Section 2 Rev: 1.00 Issue 1 Page 2-3
ENG-FORM: 805-0115.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
2.4.5 Post-Installation Checks
2.4.5.1 Voltage/Resistance Checks
Do not attach the RM01 until the following conditions are met.
Install the AMU50 or similar audio management unit and check the following:
a) Check pin <6> for RM01 ground (ground return to AMU).
b) Check pin <5> for chassis ground (less than 0.5 Ω).
2.4.5.2 Power On Checks
Power up the aircraft’s systems.
a) Check pin <1> for RM01 power (5 Vdc from AMU).
Verify normal operation of all functions of the RM01. Refer to the Installation and Operation manual for
the device to which the RM01 is connected for verification of the RM01 operation.
Upon satisfactory completion of all performance checks, make all required log book entries, electrical
load, weight and balance amendments and other documentation as required by your local regulatory
agency before releasing the aircraft for service.
2.5 Adjustments and Connections
The RM01 stores system configuration data for an audio control system such as the DACS. When
installed in the DACS, the configuration data can be modified using the Device Configuration Software
(DevCs) application. Refer to the SM76 AMU50-001 Audio Management Unit Installation and Operation
Manual and the DevCs Installation and Operation manual for information on connection and operation of
the DevCs.
After an RM01 has been programmed using the DevCs, all settings that are essential to aircraft operation
must be verified by a system test in both normal and emergency modes (e.g. direct audio audible to crew,
transmit and receive functions on COM1 and COM2 operate correctly for crew, required intercom
functions operate correctly, etc).
2.6 Accessories Required But Not Supplied
Installation kit p/n RM01-IKC is required to complete the installation. The kit consists of the following:
RM01-IKC consists of
Quantity Description NAT Part #
1 D-sub 9 Pin Socket Housing 20-21-009
9 Contact, Socket Crimp 20-26-901
1 Hood, D-sub, Metal 20-28-009
1 Cable Clamp, D-sub (SET) 20-27-189
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RM01-001 Remote Memory
SM77 Installation and Operation Manual
Section 2 Rev: 1.00 Issue 1 Page 2-4
ENG-FORM: 805-0115.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
2.7 Installation Drawings
DRAWING REV. DESCRIPTION TYPE SERIAL No.
RM01\001\403-0 1.21 Remote Memory Interconnect 3000 and up
RM01\001\405-0 1.00 Remote Memory Connector Map 3000 and up
RM01\001\521-0 1.01 Remote Memory Environmental Qual. Form 3000 and up
RM01\001\922-0 1.10 Remote Memory Mechanical Installation 3000 and up
Section 2 ends following the above documents
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REVISIONS
REV DESCRIPTION DATE BY
1.10
RE FER TO DOCCR02229 FOR DETAILS.
AUG 29/07
MWS
1.20 RE FER TO DOCCR02602 FOR DETAILS. JUL
31/08
TAT
1.21
DOCCR02662 CORRECTED J1 02 PIN 14 TO 41. OCT
24/08
TAT
RM01-001
J1
P1
9 PIN FEMALE DMIN
MATING CONNECTOR
CHASSIS GROUND 5
ffi cc
J1 02
AMU50
RM01 POWER 1 17 RM01 POWER
ffi
RM01 GROUND 6 10 RM01 GROU ND
SPI MOSI 3 n n 41 RM01 MO SI
1 1 1 1
SPI MISO 2 x x 25 RM01 MISO
SPI CLK Hl 8 8 RM01 CLK Hl
1 1 1 1
SPI CLK LO 9
~&
&'[____
9 RM01 CLK LO
SPI RM CS 7 48 RM01 CS
SPARE 4
NOTES:
1. ALL WIRES SHOULD BE 22 AWG UNLESS OTHERWISE SPECIFIED. 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.
ALL SHIELDED WIRE/CABLE SHOULD BE IN ACCORDANCE WITH
MIL-C-27500.
L1
GROUNDED NOT MORE THAN 0.7 FT [0.2 M] FROM UNIT.
& SHIELDS SHOULD
BE GROUNDED TO CONNECTOR
BACK SHELL (METAL TYPE).
ffi CABLING NOT
MORE THAN 1 FT [0.3 M] FROM UNIT.
CONFIDENTIAL AND PROPRIETARY TO NAT L TD.
DESIGNED
MO
•
DRAWN MWS
:•:nat NORTHERN AIRBORNE
TECHNOLOGY LTD.
•
DATE JUL 13/07
TITLE
REMOTE MEMORY
CHECKED
NAT
255
NAT
SIZE 1 CAGE CODE
1 PART NO.
1 REV.
SHEET
APPROVED A 3AB01
RM01-001
1.21 1
/1
114
FILE 403-0.DWG DWG. TYPE
INTERCONNECT 1 DWG. NO. RM01 \001\403-0
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= R s s s c
M p p p H
0 1 1 A A
9
PIN FEMALE DMIN
1 R s
MATING CONNECTOR
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0 s s s
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0 1 1 1
1 R c c
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0 c
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D
VIEW IS FROM REAR OF AIRFRAME CONNECTOR
CONFIDENTIAL AND PROPRIETARY TO NAT LTD.
DESIGNED
MDO
•
DRAWN MWS
:•:nat NORTHERN AIRBORNE TECHNOLOGY
LTD.
•
DATE JUL 12/07
TITLE
NAT
REMOTE MEMORY
CHECKED
249
NAT
SIZE CAGE CODE
1PART NO.
1 REV. 1 SHEET
APPROVED 129 A 3AB01
RM01-001
1.00 1/1
FILE 405-0.DWG DWG. TYPE
CONNECTOR MAR 1 DWG. NO. RM01\001\405-0
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:i:nat: ENVIRONMENTAL QUALIFICATION FORM
•
Description: Remote Memory Document#: RM01\001\521-0
NAT Part#: RM01-001
TSO#:
TSO-C139
Manufacturer's Specification and/or Other Applicable Specification:
RTCAID0-160E, RTCA/D0-214
Manufacturer: Northern Airborne Technology Ltd.
Address: 1925 Kirschner Rd., Kelowna, BC, Canada. V1Y 4N7
Prepared By: ® Checked
By: r ~~T -~
Approved By: @
5 205
149
Conditions
Temperature and Altitude
Ground Survival Low Temperature
Short-Time Operating Low Temp.
Operating Low Temperature
Ground Survival High Temperature
Short-Time Operating High Temp.
Operating High Temperature
ln-flight Loss of Cooling
Altitude
Decompression
Overpressure
Temperature Variation
Humidity
Operational Shocks and Crash Safety
Operational Shocks
Crash Safety
Vibration
1Rev: 1.01
ENG-FORM: 521-0102.DOT
Section
4.0
4.5.1
4.5.1
4.5.2
4.5.3
4.5.3
4.5.4
4.5.5
4.6.1
4.6.2
4.6.3
5.0
6.0
7.0
7.2.2
7.3.2
Description
of Conducted Tests
Category [(A4
)(D1 )-]
-55° c
-45° c
-40° c
+85° c
+70° c
+70° c
N/A. No forced air cooling.
+50,000 ft (+15,240
m)
+8,000 ft to +50,000 ft (+2,438 m to + 15,240 m)
-15,000 ft (-4,752 m)
Category
B.
Category B.
Category B.
Alternate Test Procedure.
Alternate Test Procedure (Impulse).
7.3.3 Test Procedure 2 (Sustained), Unknown or
Random orientation in aircraft.
8.0 Category [(SBM)(U2FF1 )] (without shock
mounts).
Apr21,2009
Page 1 of 31
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
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-------
:i:nat:
. RM01-001 Environmental Qualification Form
Conditions Section Description
of Conducted Tests
Explosive Atmosphere 9.0 Category
X, no test performed.
Waterproofness 10.0 Category
X, no test performed.
Fluids Susceptibility 11.0 Category
X, no test performed.
Sand and Oust 12.0 Category
X, no test performed.
Fungus 13.0 Category
X, no test performed.
Salt Fog 14.0 Category
X, no test performed.
Magnetic Effect 15.0 Category Z.
Power input 16.0 Category
Z.
• Equipment receives conditioned input power
from AMU50-xxx. The equipment was tested
configured as part
of the DACS.
• The system was tested to
D0-160E
subparagraph 16.6.1.3 b, requirement for
equipment with digital circuits.
• The system was tested to
D0-160E
subparagraph 16.6.1.1 b (3) Emergency
Operating Voltage conditions.
• The system was tested to
D0-160E
subparagraph 16.6.2.2 Low Voltage
Conditions
Voltage Spike 17.0 Category
A.
• Equipment receives conditioned input power
from AMU50-xxx. The equipment was tested
configured as part
of the DACS.
Audio Frequency Susceptibility 18.0 Category
Z.
• Equipment receives conditioned input power
from AMU50-xxx. The equipment was tested
configured as part
of the DACS.
lnduced Signal Susceptibility 19.0 Category [ZC].
1Rev: 1.01
Apr21,2009 Page 2 of 31
ENG-FORM: 521-0102.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
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:•:nat:
. RM01-001 Environmental Qualification Form
Conditions Section Description of Conducted Tests
Radio Frequency Susceptibility 20.0 Category [RR].
• D0-160E subparagraph 20.5 Radiated
Susceptibility was tested per D0-214 section
2.5.11 and D0-160E.
Radio Frequency Emission 21.0 Category
H.
Lightning lnduced Transient 22.0 Category [A3Z33].
Susceptibility • The RM01-001 was tested to D0-160E
subparagraph 22.5.2 Cable Bundle Tests
using waveform set
J, Single/Multiple Stroke
Level
3, Multiple Burst Level 3. Ali pulse
waveforms were applied using the ground
injection test method
in section 22.5.2.2
because the cable bundle was too short
to
pass through the injection transformer.
Lightning Direct Effects test 23.0 Category
X, no test performed.
lcing 24.0 Category
X, no test performed.
Electrostatic Discharge 25.0 Category
X, no test performed.
Fire, Flammability 26.0 Category X, no test performed.
Other Tests
REMARKS
• D0-160E, Sections 4 to 8, and 15 to 17 tests were conducted at Northern Airborne Technology
Ltd. (NAT) in Kelowna, BC on RM01-001.
• D0-160E, Sections 18 to 22 tests were conducted at CKC Laboratories
in Bothell, WA on
RM01-001.
• Testing was conducted with the RM01-001 configured as part of the Digital Audio Communication
System (DACS). Where compliance with Minimum Performance Standards is required by
D0-160E it was assessed on the system against D0-214 Section 2.5.
• Testing was performed between June 2008 and March 2009.
End of Environmental Qualification Form
1Rev: 1.01
Apr21,2009
Page 3 of 31
ENG-FORM: 521-0102.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
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RE VISIONS
REV DESCRI PT I ON DATE BY
1.01 DOCCR02157 -
MASS WAS 0.083 lbs. JUL 23/07
MWS
1.02 DOCCR02205 - ADDED TOL TO DIM 1.91[48.51]
AUG 14/07
MWS
1.10 DOCCR02623 -
ADDED WARRANlY VOID & ESD LABEL. SEP 05/08
MWS
~0 .1 6 [M . O]
/ l <i> [ .c . "'l(')
(4 PLACES)
0. 15 [3.8] 11------- 1.9
1± 0. 02 [ 48 .5±0.5 ]- 0. 20 [5 . 0] ES T.-
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NOTES :
1. DIMENSIONI NG AND TO LE RANCI NG
IN ACCORDANCE WITH ASME Y1 4. 5M -1 994
CONFIDENTIAL AND PROPRIETARY TO NAT LTD.
TOLERANCES UN LESS DIMENSI
ONS
DESIGNED MO
•
STATED OTHERW IS E IN INCHES DRAWN
MWS
:•:nat NORTHERN AIRBORNE TECHNOLOGY LTD.
•
O.X =+ / - 0. 030 T HI RD ANGLE
JUN 11/07
O. XX =+ / - 0 .010 PROJECTI ON
DATE
TITLE
REMOTE MEMORY
O.X XX =+ / - 0. 005
-®-Et
~AT O. XXXX=+ / - 0. 002
CHECKED NAT
ANGLE =+ / - 0 .5 DE G.
~05
255
M ASS : 0.09 lbs. (40.8 g) MAX
(~~:)
SIZE 1 CAGE COD E 1
PART NO. 1REV. 1SH
EE T
APPROVED A 3AB01
RM01-001
1.10 1/1
MATERIA L:-
FI NI S H:-
FILE 922-::o.DWG DWG . TYPE MECH. INSTALLATION 1 DWG . NO .
RM01\001\922-0
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RM01-001 Remote Memory
SM77 Installation and Operation Manual
Section 3 Rev: 1.00 Issue 1 Page 3-1
ENG-FORM: 806-0111.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
Section 3 Operation
3.1 Introduction
Information in this section consists of the functional and operational procedures for the RM01-001 Remote
Memory (RM01).
3.2 General Information
The RM01 is a Remote memory unit for the Northern Airborne Technology Ltd. (NAT) Digital Audio
Communication System (DACS).
The DACS is a communications management system that distributes and controls all of the audio in an
aircraft. It manages the audio from all transceivers, receivers and audio warning sources. It enables the
transmission of microphone audio to a selected transmitter and distributes all Inter-Communication
System (ICS) audio.
The RM01 is a remote mounted device that connects to the DACS AMU50 Audio Management Unit. The
RM01 stores the system’s configuration and aural alert files. Storing the system configuration and alert
files in this unit enables the replacement of the AMU50 without the need of downloading a new
configuration file.
The RM01 communicates with the AMU50 over a Serial Peripheral Interface (SPI) port. The RM01 also
receives regulated power from the AMU50.
Optionally, more than one RM01 may be used in an aircraft to provide rapid re-configuration of an aircraft
audio when an aircraft is assigned to a different role. The connector on the harness from the AMU50 can
be moved to the RM01 which contains the configuration appropriate to the required role.
The RM01 Remote Memory has no operator accessible controls.
Section 3 ends
The document reference is online, please check the correspondence between the online documentation and the printed version.

The document reference is online, please check the correspondence between the online documentation and the printed version.