Install Manual

Preliminary
SKY899
Installation Manual
A-3
Rev. A
SIGNAL CHARACTERISTICS
ARINC-429 External Interface CONNECTION Connector-Pin
Signal Name
(Continued) 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
Audio (Alert) Output This output is directly compatible with industry standard audio panels
(see paragraph 2.10).
NOTE
Audio output from the TRC is transformer isolated.
This output is disabled when a terrain warning alarm is detected (see
paragraph 2.7.1)
CONNECTION Connector-Pin
Signal Name
P1-89
(AUDIO_H) - 600 Ω
P1-90
(AUDIO_L) - 150 Ω
P1-91 (AUDIO_C) Audio Common
CABLE Minimum 22 AWG twisted shielded pair cable for
lengths up to 30 ft.
POWER 40 mW into a 600 Ω load. Audio level is adjustable
via service menu.
FREQUENCY 0 - 3.0 kHz
LOAD Z Selectable 150 or 600 Ω
Audio Inhibit This input senses a terrain warning alarm and temporarily disables the
(Terrain Warning System - SKY899 audible alert messages until the warning clears (see paragraph
2.7.1).
GPWS) The input can be either a constant flag signal or an alternating flag
output. The flag must be cleared for five (5) seconds before the TRC
accepts a "NO ALARM" condition and restores audible alerts.
IF THE
AIRCRAFT IS NOT EQUIPPED WITH TERRAIN WARNING SYSTEM
, LEAVE THIS
INPUT UNCONNECTED
.
NOTE
If the aircraft is equipped with terrain warning system (GPWS), it
must be connected to the TRC.