Garmin 155XL Maintenance Manual page 23

3.6 EXTERNAL CONNECTORS
The GPS 155XL provides interfaces to various General Aviation Instruments via a 37 pin connector, J1, and a 26
pin connector, J2. Tables 3-3 and 3-4 provide pinout information to aid in troubleshooting.
J1 PIN
NUMBER
3-8
Table 3-3. J1 Pinout Information
1 D-BAR LEFT +
2 TO +
3 FLAG +
4 FLAG -, D-BAR RIGHT +, FROM +, STATOR E, STATOR G
5 RESERVED
6 RESERVED
7 OBI CLOCK
8 OBI DATA
9 APPROACH ARM LOW
10 NAV SUPER FLAG
11 RESERVED
12 ARRIVAL ANNUN
13 APPROACH ACTV ANNUN
14 ROTOR C
15 ARINC 429 OUT B
16 ARINC 429 OUT A
17 RS232 IN 1
18 RS232 IN 2
19 RS232 OUT 2
20 MESSAGE ANNUN
21 AIRCRAFT POWER (14-28 VDC)
22 GROUND
23 OBI SYNC
24 RS232 OUT 1
25 AIRCRAFT POWER (14-28 VDC)
26 GROUND
27 RESERVED
28 APPROACH ARM ANNUN
29 CHARGE ENABLE
30 BATTERY + (POSITIVE)
31 RESERVED
32 ARINC 429 IN A
33 ARINC 429 IN B
34 BATTERY - (NEGATIVE)
35 STATOR D
36 RESERVED
37 STATOR F
PIN DEFINITION
190-00067-25 Rev D