SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
MCS--4200/7200 Multi--Channel SATCOM System
23--20--35
15 Jul 2006
Honeywell International Inc. Do not copy without express permission of Honeywell.
Page 5--61
(2) When this configuration pin is wired to the zero state, the SDU operates its input and
output ARINC 429 buses for the CMUs No. 1 and No. 2 at high speed. When wired to
the one state, the SDU operates these buses at the low speed.
E.
Cabin Packet Data Function (CPDF)
(1) The interpretation of this configuration pin is given in Table 5-11.
Table 5-11.
Cabin Packet Data Function (CPDF)
TP10 Pin E
Interpretation
0
CPDF CONNECTED
1
CPDF NOT CONNECTED
(2) When wired to the zero state, this configuration pin indicates the input designated for
the CPDF (MP1E and MP1F) is connected to an ARINC 429 source of data--3 packet
data and that the SDU output (pins MP9A and MP9B) is wired to the CPDF. The SDU
only logs/reports/ indicates CPDF failures and bus inactivity on the CPDF input bus if
this configuration pin indicates the bus is supposed to be connected to an ARINC
source. The SDU can assume (for functional purposes) the presence of the CPDF
connections from the state of this pin.
F.
ARINC 429 BUS Speed of AES ID Input
(1) The interpretation of this configuration pin is given in Table 5-12.
Table 5-12.
ARINC 429 Bus Speed of AES ID Input
TP10 Pin F
Interpretation
0
HIGH SPEED ARINC 429 BUS
1
LOW SPEED ARINC 429 BUS
G. HSU Presence
(1) The interpretation of this configuration pin is given in Table 5-13.
Table 5-13.
HSU Presence
TP10 Pin G
Interpretation
0
HSU INSTALLED
1
HSU NOT INSTALLED
(2) When wired to the zero state, this configuration indicates that SDU pins MP9E/F and
MP9G/H are connected to the high speed data unit (HSDU). The SDU only
logs/reports/indicates inactivity on its HSU input bus when this strap is in the zero
state. The SDU assumes, for functional purposes, the presence of the HSU from the
state of this strap.
