Onnector P In -O Ut (P7) - Garmin Apollo CNX80 Installation Manual

Installation Procedures
2.7.1.4 Nav I/O Connector (P7)
A navigation I/O connector, which handles VHF NAV / GPS switching, resolver and main CDI/VDI
interfaces, is located vertically on the left side of the rear panel. The NAV I/O hooks internally to the VHF
NAV board and consists a standard 37-pin D-sub connector, and has a pinout similar to the SL30 VHF
NAV unit for simpler field upgrading. The pinout for the connector is defined in the following table.
Pin # I/O Name
1 I Power +
2 I Power ground
3 O Spare ground
4 -- RESERVED
5 -- RESERVED DB30 TxD
6 -- RESERVED
7 I OBS_ D {S1}
8 I Main CDI Select In
9 O Main GS Superflag
10 O Main CDI + Valid
11 O Main CDI + FROM
12 O Main CDI + TO
13 O Main CDI + Right
14 O Main CDI + Left
15 O Back Course Out
16 O OBS_ F {S4}
17 O GPS Indicator Out
18 O NAV Indicator Out
19 O Composite Out
20 O NAV Audio Ground
21 -- RESERVED
22 -- RESERVED
23 O NAV Audio Out
24 O OBS_H {R HI}
25 O OBS_C {R LO}
26 I OBS_E {S3}
27 O Main CDI Superflag
28 O Main GS + Valid
29 O Main CDI - Valid
30 O Main GS + Up
31 O Main GS + Down
32 O Main GS - Valid
33 O ILS Energize
34 O OBS_G {S2}
35 -- RESERVED
36 O Power Control Out
37 O Composite Ground
(see Figure 2-8 for a diagram of a 37-pin connector)
2-22
Table 2-8 NAV I/O Connector Pin-Out (P7)
Description
Main Aircraft Power Input (+10 to +36 VDC)
Main Aircraft Power Ground
No current assignment
RESERVED
RESERVED (for use with the DB30)
RESERVED
OBS Resolver input pin from channel D (COS)
Selects between GPS & VHF NAV on Main CDI Output
Glideslope Indicator Valid flag output (high-level )
Nav Valid flag output (low-level)
+ From flag output
+ To flag output
CDI + Right output
CDI + Left output
active low output when reverse sensing is engaged
OBS OBS Resolver input pin from channel F (SIN)
active low output when GPS selected on Main CDI output 2.8.7.1
active low output when VHF NAV selected on Main CDI
out
VOR/LOC composite signal
audio signal ground pin
RESERVED
RESERVED
low-level nav audio output
OBS Resolver output pin to channel H
OBS Resolver return signals C
OBS Resolver return signals E
CDI high-level Valid flag output
Nav Valid flag output (low-level )
Nav Valid flag signal ground
Glideslope + Up output
Glideslope + Down output
Glideslope Valid flag signal ground
active low output when a localizer frequency is tuned
OBS Resolver return signals G
RESERVED
power control output sinks up to 50ma when unit is on
return path for the composite signal
560-0982-00 Rev D Apollo CNX80 Installation Manual
Reference
2.8.1
2.8.10.1
2.8.2
2.8.9.1
2.8.2
2.8.7.2
2.8.2
2.8.4
2.8.13.1
2.8.13.1
2.8.2
2.8.8.1
2.8.2
2.8.8.4
2.8.4