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48 Apollo SL30 Installation Manual
Table 3 - Rear Panel Connector Pinout
Pin # I/O Connection Function
1 I Power + Main DC power input
2 I Power ground Main power ground input
3 O Serial ground RS-232 signal ground
4 I RxD1 RS-232 channel 1 serial data input
5 O TxD1 RS-232 channel 1 serial data output
6 I Test Input Reserved for manufacturers test
7 I OBS_D {S1} Resolver input pin from Channel D (COS)
8 I Flip/Flop Remote NAV/Comm frequency flip/flop input
9 O GSI superflag GSI high level valid flag output
10 O Nav + valid Nav low level valid flag output
11 O + FROM + From flag output
12 O + TO + To flag output
13 O CDI + Right CDI + Right output
14 O CDI + Left CDI + Left output
15 O Back course Active low output when reverse sensing is engaged
16 O OBS_F {S4} Resolver input pin from Channel F (SIN)
17 -- Reserved Do not connect
18 -- Reserved Do not connect
19 O Composite Output VOR/LOC composite signal
20 O Audio ground Audio signal ground pin
21 O Reserved Do not connect
22 O Reserved Do not connect
23 O NAV Audio Output Low level audio output
24 O OBS_H {R HI} Resolver output pin to channel H
25 O OBS_C {R LO} Resolver return signals C
26 I OBS_E {S3} Resolver return signals E
27 O Nav superflag Nav high level superflag output
28 O GSI + valid GSI low level valid flag output
29 O NAV - valid Signal ground for NAV valid flag
30 O GSI + Up GSI +Up output
31 O GSI + Down GSI +Down output
32 O GSI - Valid Signal ground for GS valid flag
33 O ILS energize Active low output when a localizer frequency is tuned
34 O OBS_G {S2} Resolver return signals G
35 -- Reserved Do not connect
36 O Power control Power control output sinks up to 50 mA when unit is on
37 O Ground (comp) VOR/LOC composite ground return
119
20 37
Viewed from rear of unit