Garmin GTN 635, Руководство по установке

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Page 5-14 GTN 625/635/650 TSO Installation Manual
Rev. C 190-01004-02
5.2.9 Discrete Inputs
Pin Name Connector Pin I/O
OBS MODE SELECT* P1001 16 In
AUDIO INHIBIT IN* P1001 36 In
TAWS INHIBIT IN* P1001 37 In
AIR/GROUND* P1001 38 In
CDI SOURCE SELECT* P1001 39 In
DEMO MODE SELECT* P1002 1 In
SYSTEM ID PROGRAM* P1002 10 In
SPARE DISC IN D* P1002 11 In
An asterisk (*) following a signal name denotes that the signal is Active-Low, requiring a ground to
activate. If there is no asterisk, the signal is Active-High.
Active-low discrete inputs are considered active if either the voltage to ground is ≤3.5 VDC or the
resistance to ground is ≤375 . These inputs are considered inactive if the voltage to ground is
6.5-33 VDC or the resistance to ground is >100 k .
Active-high discrete inputs are considered active if either the voltage to ground is >6.5 VDC. These
inputs are considered inactive if the voltage to ground is ≤3.5 VDC or the resistance to ground is
≤375 .
5.2.9.1 OBS MODE SELECT*
The OBS MODE SELECT* discrete input may be used to toggle between GPS OBS and GPS AUTO
modes of operation. A momentary low on this pin performs the same function as pressing the ‗OBS‘ key
on the GTN display.
5.2.9.2 AUDIO INHIBIT IN*
The AUDIO INHIBIT IN* discrete input may be used to suppress TAWS and touch screen feedback
audio from the GTN.
5.2.9.3 TAWS INHIBIT IN*
The TAWS INHIBIT IN* discrete input, when toggled momentarily low, may be used to inhibit TAWS
alerts from the GTN.
5.2.9.4 AIR/GROUND*
AIR/GROUND* discrete is active-low, and can be configured to interpret if the aircraft is airborne or on
the ground based upon whether the input is grounded or open.
5.2.9.5 CDI SOURCE SELECT* (GTN 650 Only)
The CDI SOURCE SELECT* discrete input may be used to toggle between display of GPS and
VOR/LOC/Glideslope information on the MAIN external CDI/HSI. A momentary low on this pin
performs the same function as pressing the ‗CDI‘ key on the GTN display.