Installation Manual

Lynx NGT-9000
Installation Manual
0040-17001-01 (Revision W) Installation Page 2-10
2.3.5 Discrete Inputs and Output Connections
Refer to the wiring diagrams (Figure 2-6) to view connection details. Refer to functional description in
the General Information section for details. Installations with a compatible control panel may need to use
the discretes if a function is missing or if the display is not within the pilot primary field of view. Use the
following information to review connection options.
• TAWS Caution (Disc 1 Out, pin 21) status lamp (amber color). Power should be connected to
dimming bus or day/night switch. Label lamp “TAWS Caution”. This lamp is required when TAWS
is installed and the NGT-9000 panel display is not within the pilot's primary field of view.
• TAWS Warning (Disc 2 Out, pin 22) status lamp (red color). Power should be connected to dimming
bus or day/night switch. Label lamp “TAWS Warning”. This lamp is required when TAWS is
installed and the NGT-9000 panel display is not within the pilot's primary field of view.
• Traffic Alert (Disc 3 Out, pin 23) status lamp (amber color). Power should be connected to dimming
bus or day/night switch. Label lamp “Traffic Alert”. Installation necessary when no traffic display is
installed. This lamp is recommended when the Traffic Alert lamp is installed and the NGT-9000
panel display is not within the pilot's primary field of view.
• Audio Mute Out (Disc 5 Out, pin 25). The Audio Mute can be connected to other CAWS alerting
systems if required that need to mute the traffic system for a higher priority audio annunciation.
• ADS-B Out Fail (Disc 6 Out, pin 26) status lamp (amber color). Power should be connected to
dimming bus or day/night switch. Label lamp “ADS-B Fail”.
• IDENT input (Disc 1 In, pin 27) switch (momentary). It is required if other equipment does not have
the capability to activate the IDENT pulse. Label switch “IDENT”.
• Audio Mute input (Disc 2 In, pin 28). Connected to other CAWS alerting systems that need to mute
the traffic system for a higher priority audio annunciation.
• On-Ground input (Disc 3 In, pin 29). Connected to a squat switch, airspeed monitor, or a collective
switch. This discrete can be set in the DCM settings to either ground on ground, open on ground, or
not used.
• Audio Acknowledge (Disc 4 In, pin 30). Used to cancel the audio from a TAWS or Traffic Aural.
This discrete is used only when the optional TAWS, TAS, TCAS, or ATAS functionality is
configured. Available with Release 2.0 and later.
• Control Panel Select (Disc 5 In, pin 31). Release 3.2 and later. Optional connection used to select
ARINC 429 compatible Control Panel #1 or #2. When set to Ground, Control Panel #1 (ARINC 429
input pins 44 – 45) are used. When set to Open, Control Panel #2 (ARINC 429 input pins 46 – 47) is
used.
Note – Automatic control panel source selection is not available via the NGT-9000 (i.e. a selection
of an inactive or failed control panel will not automatically switch back to the operational Control
Panel.) The control panel system is intended to automatically set this discrete to perform this
switching. Control Panel #1 is located in front or left side of the aircraft. Control Panel #2 is located
in Aft or right side of the aircraft.
• Standby Mode (Disc 6 In, pin 32). Used to place the unit’s transponder in Standby Mode. This is an
optional connection typically used when dual transponders are installed. Available with Release 2.1
and later.