Page 4-6
GMA 347 Installation Manual
Revision A
190-00325-01
4.3
J3472 Connector Pin Assignments
This section covers the pin connections of J3472 only.
4.3.1 Aircraft Power and Lighting
Power Input requirements and Lighting Bus inputs are listed in the following tables. The power-input
pins accept 11-33 Vdc. AIRCRAFT POWER 2 is for connecting to an alternate power source, such as on
aircraft with two electrical buses. Refer to Figure C-1 for power interconnections.
Table 4-3. Aircraft Power Pin Assignments, J3472
Pin
Pin Name
Description
I/O
53
AIRCRAFT POWER 1
Unit power
In
55
AIRCRAFT POWER 1
Unit power
In
30
AIRCRAFT POWER 2
Unit power
In
32
AIRCRAFT POWER 2
Unit power
In
69
POWER GROUND
Aircraft ground
--
71
POWER GROUND
Aircraft ground
--
14
POWER GROUND
Aircraft ground
--
16
POWER GROUND
Aircraft ground
--
4.3.2 Lighting Bus
The GMA 347 can be configured to track a 28 Vdc or 14 Vdc lighting bus using these inputs. Refer to
Figure C-1 for lighting interconnections.
Table 4-4. Aircraft Lighting Pin Assignments, J3472
Pin
Pin Name
Description
I/O
51
14 V LIGHTING HI
14V Backlighting input, 0 to 14 Vdc
In
52
28 V LIGHTING HI
28V Backlighting input, 0 to 28 Vdc
In
