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SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
O. SDU Configuration
(1) The interpretation of this configuration pin is given in Table 5-21.
TP12 Pin E
0
SECOND SDU INSTALLED
1
SECOND SDU NOT INSTALLED
(2) When wired to the zero state, this configuration pin indicates a second SDU is
present as part of the MCS system installation. The zero state also indicates pins
MP12C/MP12D and MP12A/MP12B (cross talk to and from the other SDU,
respectively) and MP5J/MP5K (dual system select and dual system disable discretes,
respectively) are connected to the second SDU. When this pin is in the zero state, it
also indicates these signals are used to determine dual SATCOM operation as
specified in SYSTEM OPERATION. The SDU only logs/reports/indicates inactivity on
its input cross--talk bus from the second SDU when this pin is in the zero state. The
SDU can assume (for functional purposes) the presence of a second SDU from the
state of this configuration pin. The SDU also uses the state of this pin (and for dual
SATCOM installations, the state of SDU number pin TP12F) to determine the state of
its output word SDI fields.
P.
SDU Number
(1) The interpretation of this configuration pin is given in Table 5-22.
TP12 Pin F
0
SDU NO. 2
1
SDU NO. 1
The state of this strap is Don't Care for a single SDU configuration.
NOTE:
(2) When wired to the zero state, this configuration pin indicates this SDU is No. 2 in a
dual MCS system installation. The one state indicates this SDU is No. 1 in a dual
installation. The SDU uses the state of this pin and the SDU configuration pin TP12E
to determine the state of its output word SDI fields. In a single MCS system
installation, the status of this configuration pin is ignored.
Honeywell International Inc. Do not copy without express permission of Honeywell.
MCS--4200/7200 Multi--Channel SATCOM System
Table 5-21. SDU Configuration
Table 5-22. SDU Number
Interpretation
Interpretation
23- -20- -35
Page 5--66
15 Jul 2006
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