190-01134-11 GMA 350/350c/350H/350Hc Installation Manual
Rev. J Page 4-5
4.2 Power
4.2.1 Aircraft Power
4.3 Serial Data
4.3.1 RS-232
The RS-232 outputs conform to EIA Standard RS-232C with an output voltage swing of at least ±5V when
drawing a standard RS-232 load.
4.4 Lighting
.The GMA 350/350H can be configured to track a 28 Vdc or 14 Vdc lighting bus. The default
configuration assumes a 14 Vdc lighting bus. Refer to the GMA 350/350H Configuration Tool User’s
Guide (190-01349-00) for instructions on configuration.
Annunciator brightness is controlled by the photocell and is not affected by the lighting bus.
If the lighting bus input drops below 1.5 Vdc the backlight will track the photocell.
Table 4-3. Aircraft Power
Pin Name Connector Pin I/O
AIRCRAFT POWER J3502 8 In
AIRCRAFT POWER J3502 9 In
POWER GROUND J3502 10 --
POWER GROUND J3502 11 --
Table 4-4. RS-232
Pin Name Connector Pin I/O
RS-232 IN J3502 17 In
RS-232 OUT J3502 18 Out
Table 4-5. Lighting Bus
Pin Name Connector Pin I/O
LIGHTING BUS IN HI J3502 7 In
LIGHTING BUS IN LO J3502 5 Out