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SIGNAL
ARINC-429 External Interface The SKY899 has seven ARINC-429 receivers and three ARINC-429
009-11900-001
Revision F
The document reference is online, please check the correspondence between the online documentation and the printed version.
SKY899
Installation Manual
CHARACTERISTICS
transmitters (paragraph 2.9). Four of the channels are paired internally
and can operate at either low speed (12.5 kHz) or high speed (100 kHz).
However, the paired channels must be set to the same speed. The
transmitters operate only at high speed (100 kHz).
The first ARINC-429 transmitter (A429TX1) is intended to provide the
capability to interface with alternate display device. The second and third
ARINC-429 transmitters (A429TX2 & TX3) are future options.
Five of the ARINC-429 receivers can be used to input data from other
avionics systems. The sixth and seventh receivers are not used at this
time (future option).
1. The radio altimeter must provide full range output between 0 and
2500 feet. Not all altimeters provide this full range output. The full
range output can sometimes be obtained as a mod to the radio
altimeter. Check with the specific altimeter manufacturer for
compatibility and availability of modification, if necessary.
2. The TRC can accept Radio Altimeter input from ARINC-429 or DC
analog source. The Barometric Altitude can be ARINC-429 or
Gilham Code. The Heading can be ARINC-429 or Synchro (XYZ).
Select only one source for each aircraft input.
3. If 429 barometric altitude is used, it should be from the same source
that is interfaced with the transponder or it must be at least as
accurate as that source, i.e., ± 125 ft.
4. Receive channels 1 and 2 must be set to the same speed (12.5 or 100
kHz). Receive channels 3 and 4 must be set to the same speed (12.5
or 100 kHz). Channel 5 is independent of the other receivers and can
be to 12.5 or 100 kHz.
CONNECTION
Connector-Pin
NOTES
Signal Name
P1-54
A429RX1_A Ch. 1 line A
P1-55
A429RX1_B Ch. 1 line B
P1-62
A429RX2_A Ch. 2 Line A
P1-63
A429RX2_B Ch. 2 Line B
P1-64
A429RX3_A Ch. 3 Line A
P1-65
A429RX3_B Ch. 3 Line B
P1-73
A429RX4_A Ch. 4 Line A
P1-74
A429RX4_B Ch. 4 Line B
P1-75
A429RX5_A Ch. 5 Line A
P1-76
A429RX5_B Ch. 5 Line B
P1-83
A429RX7_A Ch. 7 Line A
P1-84
A429RX7_B Ch. 7 Line B
P1-81
A429RX8_A Ch. 8 Line A
P1-82
A429RX8_B Ch. 8 Line B
P1-42
A429TX1_A Ch. 1 Line A
P1-43
A429TX1_B Ch. 1 Line B
P1-44
A429TX2_A Ch. 2 Line A
P1-45
A429TX2_B Ch. 2 Line B
P1-52
A429TX3_A Ch. 3 Line A
P1-53
A429TX3_B Ch. 3 Line B
Appendix A - Page A-3
July 18, 2013
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