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 Figure 20-2
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 , and high when the
signal is > 3.5 Vdc or the resistance to ground is > 100 k.
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
resistor, as shown in Section 29
.
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
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