190-01115-01 G3X™/G3X Touch™ Avionics Installation Manual
Rev. AV Page 23-36
23.4.17 Temperature Inputs
GDU 4XX Systems:
Some thermocouple inputs are multi-purpose capable and have several configuration options. CHT5/
CHT6, GP 6/GP 7, TEMP 1/TEMP 2/TEMP 3/TEMP 4, and Oil Temp can be used for resistive based
temperature sensors. TEMP 3/4 are unavailable if CHT 5/6 are in use for CHT. TEMP 5/6 are unavailable
if EGT 5/6 are in use for EGT. TEMP 5/6 support thermocouples only. These inputs are configured by the
GDU (refer to Section 30.4.32
).
GDU 3XX Systems:
Some thermocouple inputs are multi-purpose capable and have several configuration options. CHT5/
CHT6, GP6/GP7, MISC TEMP 1/MISC TEMP 2, and Oil Temp can be used for resistive based
temperature sensors. These inputs are configured by the GDU (refer to Appendix H.4.19
).
NOTE
If installing an ungrounded thermocouple to an Analog In input, a DC reference must be
added to the LO input. This can be accomplished by adding a resistance of 1 MΩ or less
between ground and the Analog In LO input the ungrounded thermocouple is installed on.
Pin Name Connector Pin I/O
CHT1 HI J242 24 In
CHT1 LO J242 12 In
CHT2 HI J242 22 In
CHT2 LO J242 10 In
CHT3 HI J242 20 In
CHT3 LO J242 8 In
CHT4 HI J242 18 In
CHT4 LO J242 6 In
CHT5 HI / CHT 1 RESISTIVE HI / TEMP 3 HI* J242 16 In
CHT5 LO / CHT 1 RESISTIVE LO / TEMP 3 LO* J242 4 In
CHT6 HI / CHT 2 RESISTIVE HI / TEMP 4 HI* J242 14 In
CHT6 LO / CHT 2 RESISTIVE LO / TEMP 4 LO* J242 2 In
EGT1 HI J242 25 In
EGT1 LO J242 13 In
EGT2 HI J242 23 In
EGT2 LO J242 11 In
EGT3 HI J242 21 In
EGT3 LO J242 9 In
EGT4 HI J242 19 In
**GDU 4XX only (applies only to function following the last “/”)
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