Garmin Apollo SL30 COMM Installation Manual page 56

Specifications
Pin # I/O Connection
1 I Power +
2 I Power ground
3 O Serial ground
4 I RxD1
5 O TxD1
6 I Test Input
7 I OBS_D {S1}
8 I Flip/Flop
9 O GSI superflag
10 O Nav + valid
11 O + FROM
12 O + TO
13 O CDI + Right
14 O CDI + Left
15 O Back course
16 O OBS_F {S4}
17 -- Reserved
18 -- Reserved
19 O Composite Output
20 O Audio ground
21 O Reserved
22 O Reserved
23 O NAV Audio Output
24 O OBS_H {R HI}
25 O OBS_C {R LO}
26 I OBS_E {S3}
27 O Nav superflag
28 O GSI + valid
29 O NAV - valid
30 O GSI + Up
31 O GSI + Down
32 O GSI - Valid
33 O ILS energize
34 O OBS_G {S2}
35 -- Reserved
36 O Power control
37 O Ground (comp)
48
Table 3 - Rear Panel Connector Pinout
Function
Main DC power input
Main power ground input
RS-232 signal ground
RS-232 channel 1 serial data input
RS-232 channel 1 serial data output
Reserved for manufacturers test
Resolver input pin from Channel D (COS)
Remote NAV/Comm frequency flip/flop input
GSI high level valid flag output
Nav low level valid flag output
+ From flag output
+ To flag output
CDI + Right output
CDI + Left output
Active low output when reverse sensing is engaged
Resolver input pin from Channel F (SIN)
Do not connect
Do not connect
VOR/LOC composite signal
Audio signal ground pin
Do not connect
Do not connect
Low level audio output
Resolver output pin to channel H
Resolver return signals C
Resolver return signals E
Nav high level superflag output
GSI low level valid flag output
Signal ground for NAV valid flag
GSI +Up output
GSI +Down output
Signal ground for GS valid flag
Active low output when a localizer frequency is tuned
Resolver return signals G
Do not connect
Power control output sinks up to 50 mA when unit is on
VOR/LOC composite ground return
1
20
Viewed from rear of unit
19
37
Apollo SL30 Installation Manual