User's Manual

Airbus Iridium SATCOM System
165E5733-00 L-3 Aviation Recorders Proprietary
Issue, Rev. 02
21 January 2014
Page 42
6. SYSTEM INTERFACE WIRING
This section provides information on the system interface wiring required for the Airbus Iridium
SATCOM System.
6.1 General
All wire types and installation practices must comply with the requirements for the aircraft. Unless
otherwise noted, minimum wire size is 22 AWG for standard copper wire or 24 AWG for high strength
copper alloy wire.
Terminate all shields at ground block or ground stud on SDU tray. Keep shield drains and unshielded
conductor lengths as short as practicable (<3”).
6.2 Primary Power, Antenna, and SCM
The primary power, antenna, and SCM connections shown in Figure 6-1 are required for all Airbus
Iridium SATCOM System installations. The system will start and continue to operate whenever power
(20.5 – 32.2 VDC) is available at the Primary Power Input pin (J1C-2).
Figure 6-1 – Primary Power, Antenna, and SCM Interface
6.3 ARINC 429 Interfaces
The Airbus Iridium SATCOM System has 16 ARINC 429 receive ports and 6 ARINC 429 transmit
ports. Each port is software-configurable for high or low speed, and the receive ports are also
individually software-configurable for odd, even or no parity checking. The transmit ports always
transmit odd parity.