Garmin GDU 370 Installation Manual page 143

Pin Connector
47 P732
67 P732
28 P732
8 P732
27 P732
7 P732
66 P732
46 P732
70 P732
50 P732
48 P732
68 P732
10 P732
9 P732
A.3.8 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 C-1?????? for the temperature probe
interconnect.
Pin Connector
15 P732
16 P732
35 P732
A.3.9 Frequency Counter Inputs
Digital signals are updated to the display at a rate of 10 times per second (10 Hz). 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. Digital inputs can also be configured as discrete inputs.
Pin Connector
17 P732
19 P732
36 P732
38 P732
* Indicates Active Low
G3X Installation Manual – Pinouts
190-01115-01
Pin Name
ANALOG IN 22 HI
ANALOG IN 22 LO
ANALOG IN 23 HI
ANALOG IN 23 LO
ANALOG IN 24 HI
ANALOG IN 24 LO
ANALOG IN 25 HI
ANALOG IN 25 LO
ANALOG/CURRENT MONITOR IN 1 HI
ANALOG/CURRENT MONITOR IN 1 LO
ANALOG/CURRENT MONITOR IN 2 HI
ANALOG/CURRENT MONITOR IN 2 LO
THERMOCOUPLE REF IN HI
THERMOCOUPLE REF IN LO
Pin Name
OAT PROBE IN HI
OAT PROBE POWER OUT
OAT PROBE IN LO
Pin Name
FREQUENCY COUNTER IN* 1
FREQUENCY COUNTER IN* 2
FREQUENCY COUNTER IN* 3
FREQUENCY COUNTER IN* 4
I/O
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
IN
I/O
IN
OUT
IN
I/O
IN
IN
IN
IN
Page A-15
Revision A