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--69
T.
ARINC 429 BUS Speed to MCDU No. 1/MCDU No. 2/MCDU No. 3
(1) The interpretation of this configuration pin is given in Table 5-29.
Table 5-29.
ARINC 429 Bus Speed to MCDU No. 1/MCDU No.2/MCDU No. 3
TP13 Pin B
Interpretation
0
LOW SPEED ARINC 429 BUS
1
HIGH SPEED ARINC 429 BUS
(2) When this configuration pin is wired to the zero state, the SDU operates its ARINC
429 output bus for MCDU No. 1, No. 2, and No. 3 at the low speed. When wired to
the one state, the SDU operates this bus at the high speed.
U.
Cockpit Voice Call Light/Chime Option
(1) The interpretation of these configuration pins is given in Table 5-30.
Table 5-30.
Cockpit Voice Call Light/Chime Option
TP13 Pins
C
D
Interpretation
0
0
SPARE
0
1
STEADY LIGHTS AND MULTISTROKE CHIME
1
0
FLASHING LIGHTS AND SINGLE STROKE CHIME
1
1
STEADY LIGHTS AND SINGLE STROKE CHIME
(2) The SDU determines the mode of cockpit call annunciation (flashing vs. steady voice
call lamp, multistroke vs single stroke chime) from the states of these configuration
pins. The functionality of the cockpit call annunciation interface (pins MP8E and
MP8G for the call lights, and MP14B and MP14C for the chime) operate according to
the configuration pin connections selected. The selected state of pins TP13C and
TP13D applies to both air- and ground-initiated calls; it only applies to the call
annunciation phase (i.e., following connection acknowledgement by receipt of the
off-hook state as specified by the state of TP13K, a multistroke chime is silenced and
the call lamp remains on steady). The appropriate strap failure(s) is logged/indicated
if an undefined code is present. The SDU defaults to the steady lights and single
stroke chime state if an undefined code is present.
(3) The steady versus flashing light option applies to the call annunciation phase only.
The light remains on (steady) for the duration of the call after the acknowledgement
of the annunciation for either the steady or flashing light option.
