Garmin GTX 32 Installation Manual - Page 30

Power Function, Aircraft Power, Pin Name, Connector, Altitude Functions, NOTES

Get Garmin GTX 32 PDF manuals and user guides View all Garmin GTX 32 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 30 highlights

4.2 Power Function 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 Appendix C for power interconnections. 4.2.1 Aircraft Power Table 4-2. Aircraft Power Pin Assignments Pin Name Connector Pin I/O AIRCRAFT POWER 1 P3271 15 In AIRCRAFT POWER 2 P3271 23 In SWITCHED POWER OUT P3271 14 Out POWER GROUND P3271 13 -- SIGNAL GROUND P3271 25 -- 4.3 Altitude Functions Altitude functions with pin assignments are shown for reference in connection to the GNS 480 (CNX80) system. When installed as part of a Garmin Integrated Flight Deck system, altitude data is received from the GIA 63 in RS-232 format. Parallel gray code altitude inputs are considered active if either the voltage to ground is < 1.9 V or the resistance to ground is < 375 Ω. These inputs are considered inactive if the voltage to ground is 11-33 Vdc. Refer to figures in Appendix C for parallel gray code and serial data altitude interconnection. Carefully check encoder input lines for correct connection after wiring is complete. NOTES The GTX 32 contains internal altitude code line isolation diodes to prevent the unit from pulling the encoder lines to ground when the transponder is turned off. If two separate altimeters are connected to the GTX 32, one providing parallel gray code and the other, serial data, the unit selects only one for use at a time, with serial data input receiving the highest priority. For altimeters that can be connected in both serial data and parallel gray code format, such as the Garmin GAE 43 (Garmin P/N 013-00066-00), select one or the other but not both wiring connections. When connecting two GTX 32 transponders to a GPS, the unit can only receive RS-232 serial data from one unit at a time. Use a DPDT switch to connect both serial data and External Standby Select. Refer to Figure C-4 Sheets 1 and 2. Page 4-2 Revision F GTX 32 Installation Manual 190-00303-60

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
Page 4-2
GTX 32 Installation Manual
Revision F
190-00303-60
4.2
Power Function
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 Appendix C for power interconnections.
4.2.1
Aircraft Power
Table 4-2.
Aircraft Power Pin Assignments
Pin Name
Connector
Pin
I/O
AIRCRAFT POWER 1
P3271
15
In
AIRCRAFT POWER 2
P3271
23
In
SWITCHED POWER OUT
P3271
14
Out
POWER GROUND
P3271
13
--
SIGNAL GROUND
P3271
25
--
4.3
Altitude Functions
Altitude functions with pin assignments are shown for reference in connection to the GNS 480 (CNX80)
system.
When installed as part of a Garmin Integrated Flight Deck system, altitude data is received from
the GIA 63 in RS-232 format.
Parallel gray code altitude inputs are considered active if either the voltage to ground is < 1.9 V or the
resistance to ground is < 375
Ω
.
These inputs are considered inactive if the voltage to ground is
11-33 Vdc.
Refer to figures in Appendix C for parallel gray code and serial data altitude interconnection.
Carefully check encoder input lines for correct connection after wiring is complete.
NOTES
The GTX 32 contains internal altitude code line isolation diodes to prevent
the unit from pulling the encoder lines to ground when the transponder is
turned off.
If two separate altimeters are connected to the GTX 32, one providing
parallel gray code and the other, serial data, the unit selects only one for use
at a time, with serial data input receiving the highest priority.
For altimeters that can be connected in both serial data and parallel gray code
format, such as the Garmin GAE 43 (Garmin P/N 013-00066-00), select one
or the other but not both wiring connections.
When connecting two GTX 32 transponders to a GPS, the unit can only
receive RS-232 serial data from one unit at a time.
Use a DPDT switch to
connect both serial data and External Standby Select.
Refer to Figure C-4
Sheets 1 and 2.