Digital Inputs - Garmin G3X Touch Installation Manual

25.5.8

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
33.4.19 (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. AC
Section 34.4.26
Pin Name
G3X/G3X Touch Installation Manual - LRU Pinouts
(for GDU 4XX 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
Page 25-33