L3 Technologies AFIRS228S User Manual
AFIRS 228S Iridium
Global Communications System
Installation Manual
Part Numbers
SDU: 228E5733-00
SCM: 418E5733-00
Publication: 165E5733-00 Rev. 03
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EXPORT CONTROL STATEMENT IRIDIUM SATCOM
TECHNOLOGY / DATA:
“This Iridium SATCOM System Technical Data is being exported from
the United States in accordance with the Export Administration
Regulations (ECCN #7E994), No License Required (NLR). Diversion
contrary to U.S. law is prohibited. In accordance with U.S. Law (Title
15CFR Part 746 and Supplement No. 1 to Part 774; and Title 31CFR)
resale/re-export or transfer to certain designated countries is
prohibited without the prior written consent of the U.S. Department of
Commerce.”
HTSUS/Schedule B: 85439.09.000
This manual contains date-sensitive information. To verify the latest
revision level of this manual, visit our document down-load site at
http://www.L3ar.net.
©Copyright 2014 by L-3 Communications.
All rights reserved. No part of this manual may be reproduced or
utilized in any form or by any means, electronic or mechanical,
including photocopying, recording, or by information storage and
retrieval system, without permission in writing.
Inquiries should be addressed to:
L-3 Communications,
Aviation Recorders Publications
Vendor Code: 06141 P. O. Box 3041
Sarasota, Florida 34230
Phone: (941) 371–0811;
FAX: (941) 377–5591
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FCC Certification
This device complies with Part 15 of the FCC rules. Operation is subject to the following
two conditions: (1) This device may not cause harmful interference, and (2) this device
must accept any interference received, including interference that may cause undesired
operation. Changes or modifications not expressly approved by the party responsible for
compliance could void the user’s authority to operate the equipment.
NOTE: This equipment has been tested and found to comply with the limits for a Class A
digital device, pursuant to part 15 of the FCC Rules. These limits are designed to pro-vide
reasonable protection against harmful interference when the equipment is operated in a
commercial environment. This equipment generates, uses, and can radiate radio frequency
energy and, if not installed and used in accordance with the instruction manual, may cause
harmful interference to radio communications. Operation of this equipment in a residential
area is likely to cause harmful interference in which case the user will be required to correct
the interference at his own expense.
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RECORD OF REVISIONS
Rev. Issue Date Description Pages By
00 01 November 2013 Initial issue. All CM
01 15 December 2013
02 21 January 2014
03 16 July 2014 Software PN Change, removed
Corrected SDU & SCM TopLevel Part Numbers.
Corrected SDU & SCM TopLevel Part Numbers.
references to unused features,
removed non-configurable,
updated wiring diagrams, added
MCDU screenshots, added voice
and data modem models
All CM/SC
All CP
1, 6, 7, 8,
9, 22, 23,
34, 38, 39,
70-73
CP
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Table of Contents
RECORD OF REVISIONS ............................................................................................................. iv
List of Figures ..................................................................................................................................4
List of Tables....................................................................................................................................5
Appendices ......................................................................................................................................5
Supplemental Documents ...............................................................................................................5
1. Introduction ................................................................................................................................6
1.1 Applicability ........................................................................................................................6
1.2 Model Designation .............................................................................................................6
1.2.1 Iridium SATCOM System .................................................................................................................... 6
1.3 Part Numbers ....................................................................................................................6
1.4 Reference Documents ......................................................................................................6
1.5 Definitions of Acronyms and Terms ..................................................................................8
2. Description and Operation ...................................................................................................... 12
2.1 System Overview ........................................................................................................... 12
2.2 System Architecture ....................................................................................................... 13
2.3 External System Interfaces ............................................................................................ 13
3. Equipment Specifications ....................................................................................................... 16
3.1 Satellite Data Unit (SDU) ............................................................................................... 16
3.1.1 Mechanical Specifications ............................................................................................................... 17
3.1.2 Environmental Specifications –Iridium SATCOM System .............................................................. 18
3.2 SDU Configuration Module (SCM) ................................................................................. 18
3.2.1 Mechanical Specifications ............................................................................................................... 19
3.2.2 Environmental Specifications .......................................................................................................... 20
3.3 Iridium SATCOM System Satellite Antenna .................................................................. 20
3.4 Antenna Coaxial Cable .................................................................................................. 21
3.5 Interface Specifications .................................................................................................. 22
3.5.1 SDU Rear Connector (J1) .................................................................................................................. 22
3.5.2 Power Input ...................................................................................................................................... 24
3.5.3 Chassis Ground ................................................................................................................................. 24
3.5.4 ARINC 429 Digital Serial Bus Input .................................................................................................. 25
3.5.5 ARINC 429 Digital Serial Bus Output ............................................................................................... 25
3.5.6 Rear Ethernet Ports .......................................................................................................................... 25
3.5.7 Discrete Inputs .................................................................................................................................. 25
3.5.8 Discrete Outputs............................................................................................................................... 26
3.5.9 Microphone Input ............................................................................................................................ 27
3.5.10 Iridium / GPS Antenna ..................................................................................................................... 27
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3.6 Maintenance Front Panel Ethernet Port (J2) ................................................................. 27
3.7 SDU Configuration Module (SCM) ................................................................................. 27
3.8 ARINC 429 Receiver Protocols ...................................................................................... 28
3.9 ARINC 429 Receiver Activity Status .............................................................................. 29
3.10 ARINC 429 Transmitter Protocols.................................................................................. 29
3.10.1 From SDU to ATSU / FWC ................................................................................................................ 29
3.10.2 From SDU to MCDU .......................................................................................................................... 30
4. Installation Considerations ..................................................................................................... 32
4.1 Satellite Data Unit (SDU) ............................................................................................... 32
4.2 SDU Configuration Module (SCM) ................................................................................. 32
4.3 Iridium Antenna System ................................................................................................. 33
4.3.1 Antenna Specifications .................................................................................................................... 33
4.3.2 Antenna Mounting ........................................................................................................................... 35
4.3.3 Coaxial Antenna Cable ..................................................................................................................... 36
5. SATCOM Installation Materials .............................................................................................. 38
5.1 Required Materials ......................................................................................................... 38
6. System Interface Wiring ......................................................................................................... 40
6.1 General ........................................................................................................................... 40
6.2 Primary Power, Antenna, and SCM ............................................................................... 40
6.3 ARINC 429 Interfaces .................................................................................................... 41
6.3.1 Receiver Protocols ............................................................................................................................ 41
6.3.2 Transmitter Protocols ...................................................................................................................... 41
6.4 MCDU ............................................................................................................................. 42
6.5 ACARS ATSU ................................................................................................................ 43
6.6 CFDIU Interface ............................................................................................................. 44
6.7 Date, Time, and Position ................................................................................................ 44
6.8 Rear Ethernet Ports........................................................................................................ 44
6.9 Discrete Inputs ............................................................................................................... 45
6.9.1 Landing Gear Control Interface Unit (LGCIU) Input ....................................................................... 45
6.9.2 Function Assignment ........................................................................................................................ 45
6.10 Discrete Outputs ............................................................................................................. 47
6.11 SATCOM ........................................................................................................................ 47
6.11.1 Audio Integrating System ................................................................................................................ 47
7. SATCOM System Configuration ............................................................................................. 50
7.1 Access the Maintenance User Interface (MUI) .............................................................. 51
7.1.1 Home Page Tab Descriptions ........................................................................................................... 52
7.1.2 Faults Page ........................................................................................................................................ 54
7.1.3 Part Numbers Page........................................................................................................................... 55
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7.2 Maintenance Mode ......................................................................................................... 56
7.2.1 Maintenance Mode Upgrades Page................................................................................................ 57
7.3 Configure the Iridium SATCOM System ........................................................................ 64
7.3.1 Address Book .................................................................................................................................... 64
7.3.2 Owner Requirements Table (ORT) Parameters .............................................................................. 66
7.3.3 Installation Configuration Table (ICT) ............................................................................................. 68
7.3.4 User Access Table (UAT) Parameters .............................................................................................. 68
7.4 Upgrade Iridium SATCOM System Software ................................................................ 69
7.4.1 Upgrade Materials ............................................................................................................................ 69
7.4.2 Upgrade the Iridium SATCOM System Software ............................................................................ 70
7.5 Exit Maintenance Mode .................................................................................................. 72
8. Maintenance and Checkout .................................................................................................... 74
8.1 Post-Installation Checkout ............................................................................................. 74
8.1.1 Before Power-On Tests .................................................................................................................... 74
8.1.2 Aircraft Systems Interface Tests ...................................................................................................... 74
8.1.3 Operational System Tests ................................................................................................................ 78
8.1.4 EMI Tests ........................................................................................................................................... 79
8.2 Instructions for Continued Airworthiness ....................................................................... 79
List of Figures
FIGURE 2-1 –IRIDIUM SATCOM SYSTEM OPERATIONAL CONCEPT ............................................................................................. 12
FIGURE 2-2 –IRIDIUM SATCOM SYSTEM BLOCK DIAGRAM ......................................................................................................... 13
FIGURE 2-3 –IRIDIUM SATCOM SYSTEM EXTERNAL INTERFACES ............................................................................................... 14
FIGURE 3-1 –IRIDIUM SATCOM SYSTEM SATELLITE DATA UNIT (SDU) ....................................................................................... 16
FIGURE 3-2 – SDU OUTLINE DRAWING (DIMENSIONS IN [MILLIMETERS] AND INCHES) .......................................................... 17
FIGURE 3-3 –IRIDIUM SATCOM SYSTEM SDU CONFIGURATION MODULE (SCM) ..................................................................... 18
FIGURE 3-4 – SCM OBLIQUE VIEW ................................................................................................................................................ 19
FIGURE 3-5 – SCM CONNECTOR VIEW SHOWING LOCATION OF PIN 1 ...................................................................................... 19
FIGURE 3-6 – SCM OUTLINE DRAWING (DIMENSIONS IN [MILLIMETERS] AND INCHES) .......................................................... 20
FIGURE 3-7 –IRIDIUM SATCOM SYSTEM ANTENNA ..................................................................................................................... 20
FIGURE 3-8 – IRIDIUM ANTENNA COAXIAL CABLE AND CONNECTORS ...................................................................................... 21
FIGURE 3-9 – SDU CONNECTOR MAP ............................................................................................................................................ 24
FIGURE 4-1 – TYPICAL 2MCU MOUNTING TRAY FOR THE SDU ................................................................................................... 32
FIGURE 4-2 - IRIDIUM ANTENNA, OUTLINE AND DIMENSIONS .................................................................................................. 34
FIGURE 4-3 - IRIDIUM ANTENNA, GASKET .................................................................................................................................... 35
FIGURE 4-4 – IRIDIUM ANTENNA COAXIAL CABLE ....................................................................................................................... 36
FIGURE 6-1 – PRIMARY POWER, ANTENNA, AND SCM INTERFACE ............................................................................................ 40
FIGURE 6-2 – MCDU INTERFACE .................................................................................................................................................... 42
FIGURE 6-3 – ACARS ATSU INTERFACE .......................................................................................................................................... 43
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FIGURE 6-4 – CFDIU INTERFACE..................................................................................................................................................... 44
FIGURE 6-5 – REAR ETHERNET PORTS ........................................................................................................................................... 45
FIGURE 6-6 – DISCRETE INPUT INTERFACES ................................................................................................................................. 46
FIGURE 6-7 – LATCHED ACP AUDIO INTERFACE ........................................................................................................................... 48
FIGURE 7-1 – MAINTENANCE PORT LOCATION ............................................................................................................................ 50
FIGURE 7-2 – HOME PAGE – GENERAL TAB .................................................................................................................................. 52
FIGURE 7-3 – FAULTS PAGE (FAULT TAB) ...................................................................................................................................... 54
FIGURE 7-4 – FAULTS PAGE (HISTORY TAB) .................................................................................................................................. 54
FIGURE 7-5 – PART NUMBERS PAGE (SOFTWARE TAB) ............................................................................................................... 55
FIGURE 7-6 – PART NUMBERS PAGE (HARDWARE TAB) .............................................................................................................. 55
FIGURE 7-7 – MAINTENANCE MODE INITIAL DISPLAY SCREEN ................................................................................................... 56
List of Tables
TABLE 1-1 – PART NUMBERS ........................................................................................................................................................... 6
TABLE 1-2 – REFERENCES ................................................................................................................................................................. 6
TABLE 1-3 – ACRONYMS AND TERMS ............................................................................................................................................. 8
TABLE 3-1 – J1A TOP PLUG (TP) INSERT ........................................................................................................................................ 22
TABLE 3-2 – J1B MIDDLE PLUG (MP) INSERT ................................................................................................................................ 23
TABLE 3-3 – J1C BOTTOM PLUG (BP) INSERT ................................................................................................................................ 24
TABLE 3-4 – ARINC 429 RECEIVER PROTOCOLS – ATSU/FWC...................................................................................................... 28
TABLE 3-5 – ARINC 429 RECEIVER PROTOCOLS – MCDU ............................................................................................................. 28
TABLE 3-6 – ARINC 429 RECEIVER PORT MONITORING ............................................................................................................... 29
TABLE 3-7 – ARINC 429 TRANSMITTER PROTOCOLS SDU – ATSU/FWC ..................................................................................... 29
TABLE 3-8 – ARINC 429 TRANSMITTER PROTOCOLS SDU – MCDU ............................................................................................. 30
TABLE 7-1 - READ PRIVILEGES BY ROLE ......................................................................................................................................... 60
TABLE 7-2 - DOWNLOAD PRIVILEGES BY ROLE ............................................................................................................................. 61
TABLE 7-3 – MODIFY PRIVILEGES BY ROLE .................................................................................................................................... 62
Appendices
Appendix A – Wiring Diagram ................................................................................................................................. 1
Appendix B – ORT Worksheet ................................................................................................................................ 4
Appendix C – System Faults ................................................................................................................................... 6
Supplemental Documents
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1. INTRODUCTION
This section provides a general introduction to the Iridium SATCOM System and its applicable
standards and references.
1.1 Applicability
This Installation Manual provides the information necessary to plan the Iridium SATCOM System
installation and integration in the aircraft. It defines the mechanical and electrical interfaces for each
Line Replaceable Unit (LRU) and provides the procedures required to properly configure, test, and
maintain the Iridium SATCOM System. This manual is applicable to the following software version(s):
Software Part Number: 840E5733-09
1.2 Model Designation
This manual covers model designation Iridium SATCOM System.
1.2.1 Iridium SATCOM System
The Iridium SATCOM System has a dual-channel Iridium link, one dedicated for safety-services data
and the other prioritized for safety-services voice.
1.3 Part Numbers
The following part numbers are defined for the LRUs of the Iridium SATCOM System.
Table 1-1 – Part Numbers
Part Number Description
228E5733-00 Iridium SATCOM System Satellite Data Unit (SDU)
418E5733-00 Iridium SATCOM System SDU Configuration Module (SCM)
Formatted: No underline, Font color: Auto, Not Highlight
1.4 Reference Documents
Table 1-2 – References
Ref. Document Number Description
1.
ANSI/TIA/EIA-232F-1997
2.
ARINC 429-19 Mark 33 Digital Information Transfer System (DITS)
3.
ARINC 573-7 Mark 2 Aircraft Integrated Data System (AIDS Mark 2)
4.
ARINC 600-16 Air Transport Avionics Equipment Interfaces
5.
ARINC 619-3 ACARS Protocols For Avionic End Systems
6.
ARINC 664-2 Aircraft Data Networks
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AFIRS 228S Iridium Global Communications System Installation Manual
Ref. Document Number Description
7.
ARINC 702-6 Flight Management Computer System
8.
ARINC 702A-3 Advanced Flight Management Computer System
9.
ARINC 717-14 Flight Data Acquisition and Recording System
10.
ARINC 718-4 Mark 3 Air Traffic Control Transponder (ATCRBS/MODE S)
11.
ARINC 718A-2 Mark 4 Air Traffic Control Transponder (ATCRBS/MODE S)
12.
ARINC 739A-1 Multi-Purpose Control And Display Unit
13.
ARINC 741-13 Aviation Satellite Communication System
14.
ARINC 758-2 Communications Management Unit (CMU) Mark 2
15.
ARINC 761-4
16.
FAA TSO C-159a
17.
GAMA Publication
No. 11, Ver. 5.1
18.
IEEE 802.3-2008
19.
RTCA/DO-160G
20.
RTCA/DO-214
21.
RTCA/DO-262A Minimum Operational Performance Standards for Avionics
22.
TIA/EIA-422-B
Second Generation Aviation Satellite Communication System,
Aircraft Installation Provisions
Technical Standard Order, Avionics Supporting Next Generation
Satellite Systems (NGSS)
ARINC 429, General Aviation Subset
IEEE Standard for Information Technology-Specific Requirements
- Part 3: Carrier Sense Multiple Access with Collision Detection
(CMSA/CD) Access Method and Physical Layer Specifications
Environmental Conditions and Test Procedures for Airborne
Equipment
Audio Systems Characteristics and Minimum Operational
Performance Standards for Aircraft Audio Systems and
Equipment
Supporting Next Generation Satellite Systems (NGSS)
Electrical Characteristics of Balanced Voltage Digital Interface
Circuits
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1.5 Definitions of Acronyms and Terms
Table 1-3 – Acronyms and Terms
Acronym Definition
ACARS Aircraft Communications Addressing and Reporting System
ACP Audio Control Panel
ADB Address Book
AFIRS Automated Flight Information Reporting System
ANSI American National Standards Institute
APU Auxiliary Power Unit
ATE Automatic Test Equipment
ATS Air Traffic Service
ATSU Air Traffic Service Unit
ARINC Aeronautical Radio Incorporated
AWG American Wire Gauge
BCD Binary Coded Decimal
BITE Built-In Test Equipment
BOP Bit Oriented Protocol
BP Bottom Plug
BSP Board Support Package
CF Compact Flash
CNSSA Core Non-Safety Services Application
CTS Clear To Send
DITS Digital Information Transfer System
DTP Date Time Position
EFB Electronic Flight Bag
EIA Electronics Industry Association
ELA Embedded Logic Application
FAA Federal Aviation Administration
F/W Firmware
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Acronym Definition
FWC Flight Warning Computer
GAMA General Aviation Manufacturers Association
GFI General Format Identifier
GPS Global Positioning System
GSE Ground Service Equipment
HBP Harvard Bi-Phase
HYB Hybrid
ICA Instructions for Continued Airworthiness
ICAO International Civil Aviation Organization
ICD Interface Control Document
ICE Iridium Certified Equipment
ICT Installation Configuration Table
IEEE Institute of Electrical and Electronics Engineers
IMEI International Mobile Equipment Identifier
ISO International Organization for Standardization
LGCIU Landing Gear Control Interface Unit
LED Light Emitting Diode
LRU Line Replaceable Unit
LSK Line Select Key
MCDU Multi-Purpose Control and Display Unit
MOPS Minimum Operational Performance Specifications
MP Middle Plug
MUI Maintenance User Interface
N/C Normally Closed
NGSS Next Generation Satellite Systems
N/O Normally Open
ORT Owner Requirements Table
PBX Public Branch Exchange
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Acronym Definition
PC Personal Computer
P/N Part Number
PSTN Public Switched Telephone Network
PTT Push To Talk
RMS Root-Mean-Square
RTS Request To Send
RTCA Radio Technical Commission for Aeronautics
RX Receive
SAL System Address Label
SATCOM Satellite Communications
SCM SDU Configuration Module
SDI Source/Destination Identifier
SDU Satellite Data Unit
SIM Subscriber Identity Module
SSA Safety Service Application
SSM Signed Status Matrix
SW Software
TIA Telecommunications Industry Association
TNC Threaded Neill–Concelman
TP Top Plug
TX Transmit
TSO Technical Standard Order
UAT User Access Table
UTC Coordinated Universal Time
VAC Volts Alternating Current
VDC Volts Direct Current
WPS Words Per Second
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2. DESCRIPTION AND OPERATION
This section describes the system operation and architecture.
2.1 System Overview
The Iridium SATCOM System provides multiple voice and data communications functions in the
aircraft. The Automated Flight Information Reporting System (AFIRS) provides a satellite voice and
data communications (SATCOM) link with the Public Switched Telephone Network (PSTN) via the
Iridium® satellite network. The system uses a standard ARINC 741/761 SATCOM interface to the flight
crew’s Audio Integrating System and ARINC 739A Multi-Purpose Control and Display Units (MCDUs)
in the cockpit.
Figure 2-1 –Iridium SATCOM System Operational Concept
The Iridium SATCOM System provides a dedicated safety-services data channel with the capability to
send and receive standard ACARS messages between the aircraft’s Air Traffic Service Unit (ATSU)
and a safety-services certified terrestrial service provider.
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2.2 System Architecture
The Iridium SATCOM System consists of modular avionics components that can be tailored to meet
customer needs. The core system components are the Satellite Data Unit (SDU), the SDU
Configuration Module (SCM), and the Iridium Antenna (see Figure 2-2).
Figure 2-2 –Iridium SATCOM System Block Diagram
2.3 External System Interfaces
• Audio System Interface (1)
• ARINC 429 Transmitters (6) and Receivers (16)
• Discrete Outputs (8) and Inputs (16)
• Iridium Antenna (1)
• User Media Interfaces – SIM (1), CF (1)
• Maintenance Interfaces – Ethernet (1)
• Ethernet Ports (4)
• Voice Modem – Iridium 9523
• Data Modem – Iridium 9602
Figure 2-3 illustrates the interfaces that the Iridium SATCOM System provides to external aircraft
systems or to the user.
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Figure 2-3 –Iridium SATCOM System External Interfaces NEED EFB GRAPHIC
• Audio System Interface (1)
This interface consists of a Microphone Input to the SDU and an Interphone Output from the SDU
to connect to a standard (DO-214) Audio Integrating System (e.g. Audio Panel) in the aircraft.
• ARINC 429 Transmitters (6) and Receivers (16)
These interfaces can be software-configured to connect to various aircraft systems to support both
the display and control functions of the Iridium SATCOM System. Typical interfaced systems
include MCDUs, ACARS ATSUs, etc.
• Maintenance Front Panel Ethernet Port J2 (1)
An RJ45 jack on the front panel provides Maintenance Port access using an Ethernet connection.
• Rear Ethernet Ports (4)
These interfaces can be used to connect to several different systems. Typical interfaced
systems include EFB, etc.One of these ports can also be used to provide a remote maintenance
port interface (e.g. in the flight compartment).
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•
Discrete Outputs (8) and Inputs (16)
Discrete inputs and outputs can be used to provide or supplement various flight crew control and
display interactions, particularly for voice functions. Discrete inputs can also be used to determine
the states of various aircraft systems when this information is not available on a databus (e.g.
Weight-on-Wheels, Doors Closed, etc.).
•
Iridium Antenna (1)
An antenna mounted on the top of the fuselage is used to communicate with both the Iridium
satellite network and the GPS satellite network.
•
User Media Interfaces – SIM (1), CF (1)
There are two types of media available for the user to insert or remove from the Iridium SATCOM
System. The SCM contains a user accessible Subscriber Identity Module (SIM) card slot for
storage of the Iridium communications management information. The SDU contains a front panel
accessible Compact Flash (CF) that must be installed to be used for system fault testing.
•
Voice Modem – Iridium 9523
Connects the Iridium System in the aircraft to the Iridium satellite for voice communication.
•
Data Modem – Iridium 9602
Connects the Iridium System in the aircraft to the Iridium satellite for ACARS data communication.
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3. EQUIPMENT SPECIFICATIONS
This section describes the mechanical and environmental specifications of the components of the
Iridium SATCOM System.
3.1 Satellite Data Unit (SDU)
The SDU is housed in an ARINC 600 2MCU enclosure designed to be mounted in a standard ARINC
600 mounting tray.
Figure 3-1 –Iridium SATCOM System Satellite Data Unit (SDU)
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3.1.1 Mechanical Specifications
Dimensions 7.81” x 2.27” x 15.02” (198.3mm x 57.7mm x 381.5mm)
Weight 7.7 lbs. (3.49 kg) Max
Material/Finish Aluminum Alloy with Black Polyurethane Finish
Mounting ARINC 600 2MCU Mounting Tray
Rear Mating Connector Size 2 ARINC 600 Receptacle
Maintenance Connector RJ45 (8P8C) Modular Connector Jack
Flash Card CompactFlash® (Type I or Type II)
Radiall P/N: NSXN2P201S0004
Figure 3-2 – SDU Outline Drawing (dimensions in [millimeters] and inches)
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3.1.2 Environmental Specifications –Iridium SATCOM System
Refer to Supplemental Documents for environmental testing conditions, categories and
descriptions of the SDU tests conducted.
Note:
DO-160G categories for the Iridium SATCOM System are as specified by the design.
3.2 SDU Configuration Module (SCM)
The SCM is housed in a small enclosure designed to be mounted within 24” of the SDU rear
connector. Typically, the SCM will be mounted on or near the ARINC 600 mounting tray used for the
SDU. See Figure 3-6 for an outline of this component.
Figure 3-3 –Iridium SATCOM System SDU Configuration Module (SCM)
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3.2.1 Mechanical Specifications
Dimensions 1.00” x 2.00” x 4.69” (25.4mm x 50.8mm x 119.1mm)
Weight 0.4 lbs. (0.18 kg) Max
Material/Finish Aluminum alloy with clear chromate per MIL-DTL-5541,
Type II, Class 3 on all surfaces
Note:
Resistance not to exceed 20 milli-ohms
- Between mounting plate and module
- Between mounting plate and aircraft structure
Figure 3-4 – SCM Oblique View
Figure 3-5 – SCM Connector View Showing Location of Pin 1
Note:
Connector is a 9-pin D-Sub, P/N ABS1145A09P03B
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Figure 3-6 – SCM Outline Drawing (dimensions in [millimeters] and inches)
3.2.2 Environmental Specifications
Refer to Supplemental Documents for environmental testing conditions, categories, and
descriptions of the SCM tests conducted.
3.3 Iridium SATCOM System Satellite Antenna
The antenna is a Commercial Off the Shelf (COTS) unit that is mounted on the top of the aircraft’s
fuselage. It provides satellite connectivity for both the GPS and Iridium satellite systems.
Figure 3-7 –Iridium SATCOM System Antenna
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3.4 Antenna Coaxial Cable
For details on the selection and installation of the antenna coaxial cable, please see Section 4.3.3
which provides recommended coaxial cable types to be used which meet the Iridium SATCOM
System requirements.
Figure 3-8 – Iridium Antenna Coaxial Cable and Connectors
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A B C D E F G H J K
Ethernet
Ethernet
Ethernet
Ethernet
Ethernet
Ethernet
Ethernet
Ethernet
AFIRS 228S Iridium Global Communications System Installation Manual
3.5 Interface Specifications
3.5.1 SDU Rear Connector (J1)
Table 3-1 – J1A Top Plug (TP) Insert
1
1A
Tx+
Ethernet
2
1A
Rx-
3 O O O O O O O O O O
4
O O O O O O O O O O
5
4B
Tx+
Ethernet
6
4B
Rx-
7 O O O O O O O O O O
8
O O O O O O O O O O
9
O O O O O O O O O O
1A
Rx+
Ethernet
1A
Tx-
4B
Rx+
Ethernet
4B
Tx-
O O
O
O O O O O O O O
O O O O O O O O
2B
Tx+
Ethernet
2B
Rx-
2B
Rx+
Ethernet
2B
Tx-
O O
O O
3B
Tx+
Ethernet
3B
Rx-
3B
Rx+
Ethernet
3B
Tx-
10
O O O O O O O O O O
11
O O O O O O O O O O
12
O O O O O O O O O O
13
O O O O O O O O O O
14
O O O O O O O O O O
15
O O O O O O O O O O
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A B C D E F G H J K
No. 1
No. 1
No. 1
No. 1
No. 2
No. 2
No. 3
No. 3
No. 4
No. 4
No. 2
No. 2
No. 5
No. 5
No. 6
No. 6
No. 7
No. 7
No. 8
No. 8
No. 9
No. 9
No. 2
No. 3
No. 5
No. 5
No. 1
No. 1
No. 1
No. 1
No. 2
No. 2
No. 11
No. 12
No. 13
No. 14
No. 15
No. 5
No. 6
No. 7
No. 8
Phone
Phone
Phone
Phone
Table 3-2 – J1B Middle Plug (MP) Insert
1
O O O O O O
2
Ext. 1
Mic Audio
Hi
Ext. 1
Mic Audio
Lo
Ext. 1
Audio Out
Hi
Ext. 1
Audio Out
Lo
A429Rx
O O O O O O
A429Rx
A
A429Tx
B
A429Tx
A
B
3 O O
4
O
No. 1
5
Discrete
Output
6
A429Rx
No. 10
7
A429Rx
No. 8
8
Discrete
Input
9
RS232
Com
No. 2
10
RS422Rx+
RS232RXD
11
Discrete
Input
No. 14
12
A429Rx
Fault
13
Output
14 O
A
A
A
N/C
LGCIU 1
Discrete
A429Rx
No. 10
A429Rx
No. 2
Discrete
Output
RS232
No. 2
RS422Rx-
RS232CTS
Discrete
No. 14
A429Rx
Output
Chime
Output
A429Rx
O O O O O O O
No. 2
B
B
B
Discrete
Input
A429Rx
No. 3
A429Tx
No. 12
A429Rx
A429Tx
No. 3
RS422Tx-
RS232TXD
Discrete
Input
No. 6
A429Tx
Input
Com
Input
Fault
N/O
A429Rx
A
No. 3
Discrete
Input
A429Rx
A
No. 3
A429Tx
A
No. 12
A429Rx
A
A429Tx
A
No. 3
RS422Tx+
RS232RTS
Discrete
Input
No. 6
A429Tx
A
O O O O O O O O
O O O O O O O O
A429Rx
B
Discrete
A429Rx
B
A429Tx
B
Discrete
B
RS422Tx-
B
RS232TXD
RS422Rx+
RS232RXD
Discrete
A717Rx A A717Rx
B
A
No. 4
Input
A
No. 4
A
No. 3
Output
No. 3
Input
A429Rx
B
No. 5
Discrete
Input
A429Rx
B
No. 4
A429Tx
B
No. 9
Discrete
Input
RS422Tx+
RS232RTS
No. 3
RS422Rx-
RS232CTS
LGCIU
HPP
B
A429Rx
A
No. 6
Discrete
Input
A429Rx
A
No. 11
A429Rx
A
No. 4
Discrete
Output
RS422Rx+
RS232RXD
No. 4
RS422Tx-
RS232TXD
Discrete
Output
No. 15
A429Rx
A
RS422Rx-
RS232CTS
RS422Tx+
RS232RTS
A429Rx
B
No. 7
Discrete
Input
A429Rx
B
No. 11
A429Rx
B
No. 10
Discrete
Input
No. 4
Discrete
Output
No. 15
A429Rx
B
A429Tx
A
SCM
Power
SCM
Data
A429Rx
A
No. 1
RS232
Com
No. 13
A429Rx
A
RS422Tx-
RS232TXD
No. 4
RS422Rx+
RS232RXD
Discrete
Output
No. 16
A429Rx
A
A429Tx
B
SCM
Ground
SCM
Clock
A429Rx
B
No. 4
RS232
Com
No. 13
A429Rx
B
RS422Tx+
RS232RTS
No. 4
RS422Rx-
RS232CTS
Discrete
Output
No. 16
A429Rx
B
15 O O O O O O
Ext. 2
Tip
Ext. 2
Ring
Ext. 3
Tip
Ext. 3
Ring
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AFIRS 228S Iridium Global Communications System Installation Manual
Table 3-3 – J1C Bottom Plug (BP) Insert
Pin Size Description
1 20 Not Used
2 12 Primary 28 VDC Power Input
3 12 Power Ground
4 20 Not Used
5 20 Not Used
6 20 Not Used
7 12 Not Used
8 16 Chassis Ground
9 16 Not Used
10 16 Not Used
11 16 Not Used
12 5 Not Used
13 5 Iridium/GPS Antenna
Figure 3-9 – SDU Connector Map
3.5.2 Power Input
The Iridium SATCOM System is powered by +28 VDC.
3.5.3 Chassis Ground
Quantity 1
Format DC Chassis Ground
For redundant chassis ground connection only.
Not to be used as a normal current carrying conductor.
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3.5.4 ARINC 429 Digital Serial Bus Input
Quantity 16
Format DITS, ARINC 429 Low or high speed
Low Speed Data Rate 12.5 Kbps ± 1%
High Speed Data Rate 100 Kbps ± 1%
SSM/SDI/Data Definition Software Selectable Protocols
3.5.5 ARINC 429 Digital Serial Bus Output
Quantity 6
Format DITS, ARINC 429 Low or high speed
Low Speed Data Rate 12.5 Kbps ± 1%
High Speed Data Rate 100 Kbps ± 1%
SSM/SDI/Data Definition Software Selectable Protocols
3.5.6 Rear Ethernet Ports
Quantity 4
Format 802.3 10BASE-T/100BASE-TX, half- and full-duplex modes
(auto-negotiated)
ARINC 664P2 Physical Layer
3.5.7 Discrete Inputs
Quantity 16 Configurable
Input Impedance >10 k
Fault Current <15 mA
DIN+ Voltage Range Logic High: 7.0 – 36.0 VDC
Pulse Width (Min) 100 ms
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Ω
Logic Low: 0 – 3.5 VDC
AFIRS 228S Iridium Global Communications System Installation Manual
3.5.7.1 Configurable Inputs
Each configurable discrete input is individually software-configurable for the following:
• Signal Level: Open-Ground (Negative-Seeking) or Open-28V (Positive-Seeking)
• Logic Assignment: Active Low or Active High
• Function: Selected from list
Refer to Section 6.9 for additional information on use of configurable inputs.
3.5.8 Discrete Outputs
Each discrete output transitions between an “Open Circuit” (high-impedance-to-ground) and a “Closed
Circuit” (low-impedance-to-ground) state to indicate a change in output logic.
Quantity 8 Configurable
“Open Circuit” Impedance >100 kΩ
“Open Circuit” Voltage (Max) 36 VDC
“Closed Circuit” Current Limit (Min) 500 mA
Voltage Across “Closed Circuit” <1.25 V
3.5.8.1 Configurable Outputs
The discrete outputs use “Open-Closed” signal levels, where the output is either high-impedance to
ground (Open) or low-impedance to ground (Closed). Each configurable discrete output is individually
software-configurable for the following:
• Logic Assignment: Active Low (Closed) or Active High (Open)
• Function: Selected from list.
Refer to Section 6.10 for additional information on use of configurable outputs.
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