SKY899
Installation Manual
009-11900-001
Installation - Page 2-29
Revision F
July 18, 2013
The SKY899 can accept altitude that is compatible with ARINC characteristic 552 and 552A. In addition,
special drivers are available to support the following altimeters:
Bonzer Mark 10X
Collins ALT-50
Collins ALT-55
King KRA 405 (Aux. Output #1)
King KRA10/10A
Sperry AA-100
Terra TRA 3000
Analog radio altitude connections:
RAD_ALT_IN_HI
P1-6 (High)
RAD_ALT_IN_LO
P1-7 (Low)
RAD_ALT_FLG
P1-14 (Valid Flag)
See appendix A for signal characteristics. Some analog radio altimeters have multiple outputs (e.g., King
model KRA405), verify the output to be interfaced to matches the signal characteristics listed table A-1.
2.18.2 ARINC-429
Radio altimeter ARINC-429 speed can be 12.5 or 100 kHz. Refer to paragraph 2.9.1 for ARINC-429
general sensor input information.
2.19 SERIAL DATA
The TRC has one RS-232 debug port (J7, terminal device) for service menu access. The TRC has an
auxiliary RS-232 and RS-422 data bus designated for future use (do not connect at this time).
Debug port connection:
DIAG_GND
P7-5
DIAG_RX
P7-2
DIAG_TX
P7-3
CTS
P7-7
RTS
P7-8
Auxiliary RS-232 connection (future use):
RS232_TX2
P1-86
RS232_RX2
P1-87
RS232_GND2
P1-88
Auxiliary RS-422 connection (future use):
RS422_TXA
P1-77
RS422_TXB
P1-78
RS422_RXA
P1-79
RS422_RXB
P1-80
2.20 SOFT-KEYS
Soft-key inputs are active low (see Appendix A for signal levels). If using a WX-1000/SKY497 display
connect the soft-keys 1 thru 4 per figures 2-2 or 2-3. Do not connect an external display to soft-key inputs
when sharing the WX-1000/SKY497 display with a WX-1000 processor.
The document reference is online, please check the correspondence between the online documentation and the printed version.