User's Manual

Airbus Iridium SATCOM System
165E5733-00 L-3 Aviation Recorders Proprietary
Issue, Rev. 02
21 January 2014
Page 36
4. INSTALLATION CONSIDERATIONS
This section provides information on the installation considerations for each of the Airbus Iridium
SATCOM System components.
4.1 Satellite Data Unit (SDU)
The SDU is housed in an ARINC 600 2MCU enclosure, which is designed to be mounted in a
standard ARINC 600 mounting tray. Figure 4-1 shows a typical ARINC 600 2MCU tray used for the
SDU.
Figure 4-1 – 2MCU Mounting Tray
While the SDU does not require forced-air cooling, every attempt should be made to place the SDU in
a benign and well-ventilated environment. Placing the SDU on a plenum shelf in the Electronics Bay
of the aircraft and using a mounting tray that provides cooling air to the SDU is preferred.
The SDU tray should be electrically bonded to the airframe (<20 milliohms). It is recommended that
the SDU be located where easy front panel access is available to facilitate replacing the flash card or
connecting to the Maintenance Port.