Garmin G3X Installation Manual page 324

23.5.8 Digital Inputs
GEA 24 digital inputs are capable of sensing either an AC voltage with a peak to peak value of greater than
1 V, or an open collector type digital input. These inputs are configured by the GDU, refer to
31.4.18 (for GDU 37X systems) and
NOTE
There are 2 Fuel Flow Input Channels (channels 1 & 2) on J243 and 2 Fuel Flow Input
Channels on connector J244. As both channel 1 inputs are connected internally, and both
channel 2 inputs are connected internally, the GEA 24 effectively has only 2 two Fuel Flow
input channels. Use Channel 1 and/or Channel 2 inputs as desired, but only connect
inputs from one connector (either the 37 pin connector or the 50 pin connector) for each
channel.
FUEL XDCR +12V_2
FUEL FLOW (shared with Pin 36, J244 connector)
FUEL XDCR GND_2
FUEL XDCR +12V_1
FUEL RETURN (shared w/Pin 37, J244 connector)
FUEL XDCR GND_1
FUEL XDCR +12V_3
FUEL FLOW (shared with Pin 23, J243 connector)
FUEL XDCR GND_3
FUEL XDCR +12V_4
FUEL RETURN (shared with Pin 21, J243 connector)
FUEL XDCR GND_4
RPM 1
RPM XDCR GND_1
RPM 2
RPM XDCR GND_2
RPM XDCR +12V_1
RPM XDCR +12V_2
FUEL QTY +5V_1
FUEL QTY 1
FUEL QTY 1 GND
FUEL QTY +5V_2
FUEL QTY 2
190-01115-01
Rev. AA
Section 32.4.25
Pin Name
G3X/G3X Touch Installation Manual - LRU Pinouts
(for GDU 45X/46X systems)
Connector
J243
J243
J243
J243
J243
J243
J244
J244
J244
J244
J244
J244
J243
J243
J243
J243
J243
J243
J244
J244
J244
J244
J244
Section
Pin I/O
25 Out
23 In
22 --
24 Out
21 In
20 --
34 Out
36 In
38 --
35 Out
37 In
39 --
8 In
7 --
6 In
5 --
9 Out
10 Out
5 Out
6 In
7 --
8 Out
9 In
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