190-01115-01 G3X™/G3X Touch™ Avionics Installation Manual
Rev. AV Page 23-30
23.4.9 Discrete Inputs
The GEA 24 has 4 configurable discrete inputs that can be used as either Active High or Active Low.
These inputs are configured by the GDU (refer to Appendix H.4.19
for GDU 37X systems and to
Section 30.4.32
for GDU 4XX systems).
When configured as Active Low, the inputs conform to the following specification:
Active: Vin < 3.5 VDC, or Rin < 375 Ω
Inactive: Vin > 8 VDC, or Rin > 100 kΩ
When configured as Active High the inputs conform to the following specification:
Active: Vin > 8 VDC, or Rin > 100 kΩ
Inactive: Vin < 3.5 VDC, or Rin < 375 Ω
The GP1-GP7 inputs and the RPM2 input may also be used as additional discrete inputs. If GP6 or GP7 are
used for this purpose, the corresponding GP6 LO or GP7 LO pin must also be connected to ground (see
Section 23.4.12
).
The GP1-GP7 inputs may also be used as additional discrete inputs. When configured as an Active Low
discrete input, the GP1-GP7 inputs require an additional pull-up resistor, as shown in Figure 26-2.2
.
FUEL QTY 2 GND J244 10 --
GP 3 / FUEL QTY 3 HI / +5V 3 J244 11 Out
GP 3 / FUEL QTY 3 J244 12 In
GP 3 / FUEL QTY 3 LO / GND J244 13 --
GP 4 / FUEL QTY 4 HI / +5V 4 J244 14 Out
GP 4 / FUEL QTY 4 J244 15 In
GP 4 / FUEL QTY 4 LO / GND J244 16 --
Pin Name Connector Pin I/O
DISCRETE IN 1 J244 40 In
DISCRETE IN 2 J244 41 In
DISCRETE IN 3 J244 42 In
DISCRETE IN 4 J244 43 In
Pin Name Connector Pin I/O
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