Install Manual Part 3
Table Of Contents
- CHAPTER 4- MAINTENANCE
- APPENDIX A - SIGNAL & CABLE CHARACTERISTICS
- APPENDIX B - CHECKOUT USING TCAS-201 RAMP TEST SET
- APPENDIX C - CHECKOUT USING T-49C FLIGHTLINE TESTER
- APPENDIX D - USING THE TERMINAL DEVICE
- APPENDIX E - CHECKOUT USING ALTERNATE DISPLAY
SKY497
Installation Manual
A-4
Rev. C
SIGNAL CHARACTERISTICS
Display Power Power supply to WX-1000/SKY497 display. +15/-15 V dc from the
WX-1000 Processor (if installed) and output to the display.
CONNECTION P1-24 (DPWR+15_IN) From Processor
P1-5 (DPWR-15_IN) From Processor
P1-15 (DSPLY_GND) From Processor
P1-7 (DPWR+15_OUT) To Display
P1-6 (DPWR-15_OUT) To Display
P1-14 (DSPLY_GND) To Display
CABLE See paragraph 2.6.3.
VOLTAGE +15/-15 V dc
CURRENT 0.7 A input max.
Ground Proximity Warning This input senses a GPWS alarm and temporarily disables the
System (GPWS) Flag Input SKY497 audible alert messages until the warning clears (see para 2.6.9).
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
GPWS, LEAVE THIS INPUT UNCONNECTED.
NOTE
If the aircraft is equipped with GPWS, it must be connected to the
TRC.
CONNECTION TRC P1-32 (GPWS)
CABLE Minimum 22 AWG wire for lengths up to 30 ft.
VOLTAGE GPWS ALARM, Aircraft Ground.
NO GPS ALARM, open or 5-35 V dc.
CURRENT <5 mA sourced.
Heading Valid Indicates that the heading source is providing valid heading information.
If the heading source does not have a FLAG LO (-), the heading source
FLAG HI(+) input is connected to P1-53 (HDG_FLG+) and P1-52
(HDG_FLG-) is connected to ground.
NOTE
The active polarity (i.e., HEADING FLAG (+) or HEADING FLAG (-)
is selected via the Heading Flag Sense jumper P1-68 (see Table A on
the Interconnect Wiring Diagram, figures 2-2 and 2-3, sheet 2)
located in the connector
back-shell
.
If the heading system has a low level flag between 1.5 V dc and 2.7 V dc (when
valid), P1-68 (HEADING FLAG SENSE) should not be jumpered to ground
and P1-53 (HDG_FLG+) must remain unconnected.
CONNECTION P1-53 (HDG FLAG+)
P1-52 (HDG FLAG-)
CABLE See paragraph 2.6.4.
VOLTAGE High Sense (FLAGHI - FLAGLO):
Min: 5.0 V dc
Max: 30.0 V dc
Low Sense (FLAGHI - FLAGLO):
Min: -30.0 V dc
Max: 1.0 V dc
INPUT IMPEDANCE >2 kΩ
INPUT CURRENT Active: Min: 1 mA
Max: 15 mA