Install Manual

Preliminary
SKY899
Installation Manual
Figure 2-4. Interconnect Wiring with
Alternate Display (Sheet 1 of 2)
2-11 (page 2-12 blank)
Rev. A
NOTES:
1.) ALL WIRES TO BE 22 AWG EXCEPT WHERE NOTED.
2.) TP - USE TWISTED SHIELDED PAIR CABLE. TERMINATE SHIELD TO AIRFRAME GROUND AT SENSOR (OR POWER SOURCE).
4.) FUTURE OPTION.
5.) A RADIO ALTIMETER, AIRDATA COMPUTER, OR OTHER ARINC 429 OUTPUT DEVICE MAY REPLACE ANALOG SENSORS FOR
MAGNETIC HEADING, RADIO ALTITUDE, OR BAROMETRIC ALTITUDE.
SQUAT SWITCH
LANDING GEAR POSITION
ALTITUDE
A1
A2
A4
B1
B2
B4
C1
C2
C4
D4
SEE NOTE 6
LOW
HIGH
Z
Y
X
}
}
26 VAC REFERENCE
HEADING
DIRECTIONAL GYRO COMPASS
TRANSMITTER
RECEIVER
COMPUTER
UNIT
HEADING_FLG
N/C
HEADING_X
HEADING_Y
HEADING_Z
HEADING_H
HEADING_C
51
46
47
48
49
50
J1 P1
DSPLY_GND_OUT
ALT_A1
ON/OFF
ALT_A2
ON/OFF_RET
ALT_A4
ALT_B1
ALT_B2
ALT_B4
ALT_C1
ALT_C2
ALT_C4
ALT_D4
SQUAT
GEAR
TP
ALT_COMMON
TRC899
3.) THE SUM CABLE WILL HAVE A BLUE BAND AT EACH END. THE DIFFERENCE CABLE WILL HAVE A RED BAND AT EACH END.
6.) TIE THE OUTER SHIELD TO THE CONNECTOR BACKSHELL. CONNECTOR BACKSHELL IS CHASSIS GROUND.
HEADING INPUT CABLE
SEE NOTE 6
"OFF"
"ON" 3A @ 28VDC
WHT
ORN
BLU
WHT
BLU
WHT
BLU
BLU
BLU
WHT
BLU
ORN
WHT
WHT
BLU
BLU
WHT
ORN
ORN
TP
BLU
WHT
9.) DO NOT INSTALL EXTERNAL ISOLATION DIODES.
SEE NOTE 9
SEE NOTE 9
ALT_COMN
SFTKEY4_IN
SFTKEY3_IN
SFTKEY2_IN
SFTKEY1_IN
N/C
BLU
WHT
BLU
YEL
BLKTP
TP
10.) THESE TWO DEVICES MUST BOTH BE HIGH SPEED OR BOTH BE LOW SPEED.
HEADING VALID
DIGITIZER
P/O P/O
SEE NOTE 6
N/C
10
18
21
20
19
69
33
71
72
24
70
67
68
60
61
58
59
57
5
56
4
6
14
7
RADIO ALT
SEE NOTE 9
DC ANALOG ALT
VALID F LAG
HIGH
LOW
SCL
SDA
PLUG_GND
3.3V
LP2OUT
LP1OUT
85
LAMP BLW
PERSONALITY PLUG
PLUG_GND
2
100
92
99
3.3V
SDA
SCL
LAMP ABV
66
D2
ALT_D2
}
7.) REFER TO INSTALLATION INSTRUCTIONS FOR CABLE SELECTION ON ANTENNA CABLES.
11.) THESE TWO DEVICES MUST BOTH BE HIGH SPEED OR BOTH BE LOW SPEED.
}
SEE NOTE 12
12.) ONLY USED WITH EXTERNAL DISPLAYS THAT DO NOT ANNUNCIATE ABOVE AND BELOW.
DISPLAY_GND_OUT
TEST/ALT
RANGE
STBY/OPER
SEE NOTE 13
13.) IF D2 IS NOT USED THEN IT IS A "NO CONNECT" (N/C).
14.) OPTIONAL, MAY BE USED TO DRIVE INDICATOR DEPICTING OPERATIONAL MODE.
8.) USE AUDIO_H FOR 600 OHM AUDIO SYSTEMS. USE AUDIO_L FOR 150 OHM AUDIO SYSTEMS.
RAD_ALT_IN_LO
RAD_ALT_IN_HI
RADIO_ALT_FLG
TP
BACKSHELL
CONNECTOR
INSIDE
OPER_MODE
DISCRETE
LAMP, SEE NOTE 14
DISCRETE I/O SEE NOTE 4
31
32
N/C