Table 2-7 I/O Expansionc - Garmin GNS 480 Installation Manual

2.7.1.3 I/O Expansion Connector (P5)
Additional I/O for the GNS 480 is achieved via the I/O expansion connector, which consists of a high
density female 78-pin D-sub connector near the bottom of the unit. The pinout for the connector is
defined in the following table.
Pin # I/O Name
1 I RS232 RxD5
2 I RS232 RxD6
3 -- RESERVED
4 O 429 OUT 1A
5 O 429 OUT 2A
6 -- RESERVED
7 I 429 IN 1A
8 I 429 IN 2A
9 I 429 IN 3A
10 I RS232 RxD7
11 -- RESERVED
12 -- RESERVED
13 I Baro In (W)
14 I/O DME Clock Bus
15 I/O DME Data Bus
16 O OBI Clock
17 O OBI Data
18 I Hdg Synchro Y
19 I Hdg Synchro X
20 I Hdg Synchro Ref Hi
21 O RS232 TxD5
22 O RS232 TxD6
23 -- RESERVED
24 O 429 OUT 1B
25 O 429 OUT 2B
26 -- RESERVED
27 I 429 IN 1B
28 I 429 IN 2B
29 I 429 IN 3B
30 I RS232 RxD8
31 -- RESERVED
32 -- RESERVED
33 O Baro Hi
34 I DME Select In
35 I DME Channel Req
36 I OBI Select In
37 O OBI Sync
38 I Hdg Synchro Z
39 I Hdg Synchro Ref Lo
40 O Message Audio Out
41 O Serial Ground 5
42 O Serial Ground 6
43 O Message Audio Gnd
GNS 480 (CNX80) Installation Manual560-0982-01 Rev A
Table 2-7 I/O Expansion Connector Pin-Out (P5)
Description
RS232 channel 5 serial data input
RS232 channel 6 serial data input (opto-isolated)
RESERVED
ARINC 429 Output Channel 1A
ARINC 429 Output Channel 2A
RESERVED
ARINC 429 Input Channel 1A
ARINC 429 Input Channel 2A
ARINC 429 Input Channel 3A
RS232 channel 7 serial data input (receive-only channel)
RESERVED
RESERVED
Baro Correction Input (wiper)
Digital Serial DME Clock Bus
Digital Serial DME Data Bus
Digital OBI Clock
Digital OBI Data
Heading Synchro Input (Y)
Heading Synchro Input (X)
Heading Synchro Reference In (Hi)
RS232 channel 5 serial data output
RS232 channel 6 serial data output (opto-isolated)
RESERVED
ARINC 429 Output Channel 1B
ARINC 429 Output Channel 2B
RESERVED
ARINC 429 Input Channel 1B
ARINC 429 Input Channel 2B
ARINC 429 Input Channel 3B
RS232 channel 8 serial data input (receive-only channel)
RESERVED
RESERVED
Baro Correction Excitation Output
Digital Serial DME Select (active low)
Digital Serial DME Channel Request (RNAV)
RMI Selection input (Open = GPS, GND = NAV)
Digital OBI Sync Pulse
Heading Synchro Input (Z)
Heading Synchro Reference In (Lo)
Low Level Message Audio Out (to audio panel)
RS232 signal ground
RS232 signal ground
Message Audio ground signal (or spare ground)
Installation Procedures
Reference
2.8.10.1
2.8.10.2
2.8.10.2
2.8.10.1
2.8.5
2.8.16
2.8.15.1
2.8.6
2.8.10.1
2.8.10.2
2.8.10.2
2.8.10.1
2.8.5
2.8.16
2.8.15.2
2.8.15.1
2.8.6
2.8.14.1
2.8.10.1
2.8.14.1
2-19