User's Manual

GTS Processor Installation Manual Page 4-13
190-00587-50 Revision A
The ‘sense’ of the AIR/GROUND* and the GEAR DOWN AND LOCKED*
Active Low Discrete Inputs are configurable using the GTS Processor Install
Tool.
Two discrete inputs (CLIMB INHIBIT* 1 and CLIMB INHIBIT* 2) have been provided to indicate that
the aircraft cannot climb at the rate of 1500 feet per minute. The 1500 fpm climb limit condition should be
assumed whenever CLIMB INHIBIT* 1 OR CLIMB INHIBIT* 2 are active.
Two discrete inputs (INCREASED CLIMB INHIBIT* 1 and INCREASED CLIMB INHIBIT* 2) have
been provided to indicate that the aircraft cannot climb at the rate of 2500 feet per minute. The 2500 fpm
climb limit condition should be assumed whenever INCREASED CLIMB INHIBIT* 1 OR INCREASED
CLIMB INHIBIT* 2 are active.
Connect ADVISORY INHIBIT* 1 to the audio inhibit output from a higher priority audio source, such as
TAWS.
ADVISORY CANCEL*, SELF TEST INITIALIZE SELECT*, and TRAFFIC OPERATE/STANDBY*
inputs are driven with pulsed signals. When the switch is activated, these inputs provide the following
functionality:
· ADVISORY CANCEL* cancels the audio for the currently playing aural alert (if any). This input
can be connected to a Traffic Advisory acknowledge momentary switch to mute TA audio.
· SELF TEST INITIALIZE SELECT* initiates the Self Test function. In normal operating mode,
transitions to the active state on this line toggles the intruder altitude filter between UNR (+9,900 ft
to -9,900 ft), ABV (+9000 ft to -2700 ft), NRM (+2700 ft to -2700 ft), and BLW (+2700 ft to
-9000 ft).
· TRAFFIC OPERATE/STANDBY* toggles between Operate and Standby modes.
4.5.5 Active High Discrete Inputs
ACTIVE: 8 V ≤ Vin ≤ 36 V
INACTIVE: 0 V ≤ Vin ≤ 3.5 V, or Rin ≥ 100k ohms
Sink current is internally limited to approximately 1 mA typical for an input connected to +28VDC.
NOTE
Table 4-18 Active High Discrete Inputs
Pin Name Connector Pin I/O
HEADING VALID P8002 68 In
ANALOG RADAR ALTIMETER VALID P8002 76 In
DRAFT