190-01115-01 G3X™/G3X Touch™ Avionics Installation Manual
Rev. AV Page 23-29
23.4.8 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
Appendix H.4.19
(for GDU 37X systems) and Section 30.4.32 (for GDU 4XX systems)
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.
Pin Name Connector Pin I/O
FUEL XDCR +12V_2 J243 25 Out
FUEL FLOW (shared with Pin 36, J244 connector) J243 23 In
FUEL XDCR GND_2 J243 22 --
FUEL XDCR +12V_1 J243 24 Out
FUEL RETURN (shared w/Pin 37, J244 connector) J243 21 In
FUEL XDCR GND_1 J243 20 --
FUEL XDCR +12V_3 J244 34 Out
FUEL FLOW (shared with Pin 23, J243 connector) J244 36 In
FUEL XDCR GND_3 J244 38 --
FUEL XDCR +12V_4 J244 35 Out
FUEL RETURN (shared with Pin 21, J243 connector) J244 37 In
FUEL XDCR GND_4 J244 39 --
RPM 1 J243 8 In
RPM XDCR GND_1 J243 7 --
RPM 2 J243 6 In
RPM XDCR GND_2 J243 5 --
RPM XDCR +12V_1 J243 9 Out
RPM XDCR +12V_2 J243 10 Out
FUEL QTY +5V_1 J244 5 Out
FUEL QTY 1 J244 6 In
FUEL QTY 1 GND J244 7 --
FUEL QTY +5V_2 J244 8 Out
FUEL QTY 2 J244 9 In
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