Garmin GTX 33 Installation Manual - Page 42

Power Functions, 4.3 Temperature Inputs, Aircraft Power, Table 4-2.

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4.2 Power Functions Power Input requirements are listed in the following tables. The power-input pins accept 14/28 Vdc. Switched Power Out is a power source available for devices such as a remote digital altitude encoder. Refer to Figure D-1 and D-2 for power interconnections. 4.2.1 Aircraft Power Table 4-2. Aircraft Power Pin Name AIRCRAFT POWER 1 AIRCRAFT POWER 1 AIRCRAFT POWER 2 AIRCRAFT POWER 2 SWITCHED POWER OUT XPDR REMOTE POWER OFF POWER GROUND POWER GROUND SIGNAL GROUND SIGNAL GROUND Connector Pin I/O P3301 21 In P3301 42 In P3301 56 In P3301 60 In P3301 62 Out P3301 54 In P3301 27 -- P3301 43 -- P3301 51 -- P3301 58 -- 4.3 Temperature Inputs Temperature function with pin assignments are shown for reference since the temperature function is available in the GTX 33. In the Garmin Integrated Flight Deck system, temperature data is received from the GIA 63 in RS-232 format. Table 4-3. Temperature Inputs Pin Name CURRENT TEMPERATURE PROBE OUT CURRENT TEMPERATURE PROBE IN Connector P3301 P3301 Pin I/O 41 Out 44 In Temperature function is provided for the external display system via input to the GTX 33 transponder. The Temperature input is used for Outside Air Temperature (OAT) display and Density Altitude computations. The type of temperature probe required is a current sensor type, such as a Garmin GTP 59 or an AD590-KH or AD592 made by Analog Devices. The GTX 33 is not configurable for different types of temperature sensors. The temperature-input specification is 1 micro amp per degree Kelvin (1 uA/°K). GTX 33 Installation Manual Page 4-4 190-00906-00 Rev. F

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GTX 33 Installation Manual
190-00906-00
Page 4-4
Rev. F
4.2
Power Functions
Power Input requirements are listed in the following tables. The power-input pins accept 14/28 Vdc.
Switched Power Out is a power source available for devices such as a remote digital altitude encoder.
Refer to Figure D-1 and D-2 for power interconnections.
4.2.1
Aircraft Power
4.3
Temperature Inputs
Temperature function with pin assignments are shown for reference since the temperature function is
available in the GTX 33. In the Garmin Integrated Flight Deck system, temperature data is received from
the GIA 63 in RS-232 format.
Temperature function is provided for the external display system via input to the GTX 33 transponder. The
Temperature input is used for Outside Air Temperature (OAT) display and Density Altitude computations.
The type of temperature probe required is a current sensor type, such as a Garmin GTP 59 or an
AD590-KH or AD592 made by Analog Devices. The GTX 33 is not configurable for different types of
temperature sensors. The temperature-input specification is 1 micro amp per degree Kelvin (1 uA/°K).
Table 4-2.
Aircraft Power
Pin Name
Connector
Pin
I/O
AIRCRAFT POWER 1
P3301
21
In
AIRCRAFT POWER 1
P3301
42
In
AIRCRAFT POWER 2
P3301
56
In
AIRCRAFT POWER 2
P3301
60
In
SWITCHED POWER OUT
P3301
62
Out
XPDR REMOTE POWER OFF
P3301
54
In
POWER GROUND
P3301
27
--
POWER GROUND
P3301
43
--
SIGNAL GROUND
P3301
51
--
SIGNAL GROUND
P3301
58
--
Table 4-3.
Temperature Inputs
Pin Name
Connector
Pin
I/O
CURRENT TEMPERATURE PROBE OUT
P3301
41
Out
CURRENT TEMPERATURE PROBE IN
P3301
44
In