190-01115-01
G3X/G3X Touch Installation Manual - LRU Pinouts
Rev. AC
Page 25-70
25.14.7 Temperature Inputs
Temperature input is used for Outside Air Temperature (OAT) computations. The temperature input is a
three-wire temperature probe interface. OAT Power Out and OAT High are connected internally at the
OAT probe. A GTP 59 or other supported temperature probe is required for the GSU 73 installation. The
GTP 59 is a Resistive Temperature Device (RTD). Refer to
for the temperature probe
interconnect.
25.14.8 Frequency Counter Inputs
Digital inputs are low when the signal is
≤
2 Vdc or the resistance to ground is
≤
375
Ω
, and high when the
signal is > 3.5 Vdc or the resistance to ground is > 100 k
Ω
.
25.14.9 Fuel Select Outputs
If a resistive fuel level sensor is connected to the FUEL 1 or FUEL 2 inputs, the corresponding FUEL
SENSOR PULL-UP 1 or 2 pin must be connected to the +10 V TRANSDUCER POWER pin (58) for the
fuel level sensor to work properly. If using resistive fuel level sensors with the
GP 3/FUEL 3 or GP 4/FUEL 4 inputs, connect the high side of the input to +10 V power through a 1 k
Ω
resistor, as shown in
Pin
Connector
Pin Name
I/O
15
J732
OAT PROBE IN HI
IN
16
J732
OAT PROBE POWER OUT
OUT
35
J732
OAT PROBE IN LO
IN
Pin
Connector
Pin Name
I/O
17
J732
RPM
IN
19
J732
FUEL FLOW
IN
36
J732
CAP FUEL 1 / RPM 2
IN
38
J732
CAP FUEL 2 / FUEL FLOW 2
IN
Pin
Connector
Pin Name
I/O
76
J732
FUEL SENSOR PULL-UP 2 (FUEL 2)
OUT
77
J732
FUEL SENSOR PULL-UP 1 (FUEL 1)
OUT
