User's Manual

Table Of Contents
ABBREVIATED COMPONENT MAINTENANCE MANUAL
1458-A-1101 / 1458-A-1300
(c) The SCM is a dedicated peripheral of the SDU. The SCM package envelope and
mounting arrangement conform to ARINC 781-2. The interconnecting cable between the
SDU and the SCM must not be longer than 393.7 inches (10 meters).
1
Weight
a
The combined maximum weight of the A350 SDU and SCM is 18.72 pounds
(8.5 kg), exclusive of mounting trays, fans, and interconnecting cable.
2
Form Factor
a
The A350 SDU and SCM form factors are compliant with ARINC 781.
3
Connectors
a
The SDU uses two external interface connectors:
Rear Connector - accommodates coaxial and signal interconnections in
the TP insert, quadrax and signal interconnections in the MP insert, and
coaxial, and power interconnections in the BP insert. The top insert pin
assignment are in accordance with ARINC 781 with the following deviations
as shown in the Table 8.
Front Connector - an RJ45 and 9S DSUB connector providing 10bT
Ethernet and an RS-232 maintenance interface to the control processor.
Table 8. SDU Rear Connector Pin Deviations
Description Pin Deviation
CP maintenance TXD TP01A ATE pin 1
CP maintenance RXD TP01B ATE pin 2
CP/DP maintenance GND TP01C ATE pin 3
Data I/O processor maintenance TXD TP01D ATE pin 4
Data I/O processor maintenance RXD TP01E ATE pin 5
CC1 processors #1 and #2 maintenance GND TP01F ATE pin 6
CC1 processor #1 maintenance TXD TP01G ATE pin 7
CC1 processor #1 maintenance RXD TP01H ATE pin 8
CC1 processor #2 maintenance TXD TP01J ATE pin 9
CC1 processor #2 maintenance RXD TP01K ATE pin 10
Download security TP02A ATE pin 11
No connect TP02B ATE pin 12
Voice processor maintenance GND TP02C ATE pin 13
Voice processor maintenance TXD TP02D ATE pin 14
Voice processor maintenance RXD TP02E ATE pin 15
CC2 and CC3 maintenance GND TP02F ATE pin 16
CC2 processor maintenance TXD TP02G ATE pin 17
CC2 processor maintenance RXD TP02H ATE pin 18
EFFECTIVITY
ALL
23-15-30
Page 41 of 70
5 Oct 2012
© Honeywell International Inc. Do not copy without express permission of Honeywell.
Interim DRAFT for FCC Approval Purposes
Do Not Use for Maintenance
10-Feb-2013