Page 4-2
GTX 327 Installation Manual
Revision K
190-00187-02
4.1
Power and Lighting Function
Power Input requirements and Lighting Bus input are listed in the following tables. The power-input pins
accept 11-33 Vdc. Switched Power Out is a power source available for devices such as a remote digital
altitude encoder. Refer to Figures C-1 and C-2 for power interconnections.
4.1.1 Aircraft Power
Table 4-2. Aircraft Power Pin Assignments
Pin Name
Pin Number
I/O
AIRCRAFT POWER 1
15
In
SWITCHED POWER OUT
14
Out
POWER GROUND
13
--
SIGNAL GROUND
25
--
4.1.2 Lighting Bus
The GTX 327 unit can be configured to track a 28 Vdc, 14 Vdc, 5 Vdc or 5 Vac lighting bus using these
inputs. The GTX 327 can also automatically adjust for ambient lighting conditions based on the
photocell. Refer to sections 5.2.2 and 5.2.3 for lighting configuration.
Table 4-3. Aircraft Lighting Pin Assignments
Pin Name
Pin Number
I/O
14 V/5 V LIGHTING BUS HI
24
In
28 V LIGHTING BUS HI
23
In