190-01115-01
G3X/G3X Touch Installation Manual - LRU Pinouts
Rev. AC
Page 25-7
Lighting Bus Outputs
25.1.9
External Lighting Discrete Inputs
The GAD 27 has 3 active-low discrete lighting inputs. The Light 1 and Light 2 inputs can be connected to
cockpit switches to control the operation of the two supported aircraft external lights. Typically these
inputs are used to control one or two landing lights, or a pair of separate landing and taxi lights.
The Alternating Flash On input can optionally be used to support a cockpit switch to control the flashing
behavior of the aircraft's external lights. If this input is not connected, the external lights may still be set to
flash automatically based on airspeed (see
These active-low discrete inputs conform to the following specification:
Low: Vin < 3.5 VDC, or Rin < 375
Ω
(input active)
High: Vin > 8 VDC, or Rin> 100k
Ω
(input inactive)
25.1.10 Motor Disconnect Input
Motor Disconnect is an active low discrete input, that when active, interrupts trim and flap movement.
Connecting this input to a switch is not required, the unit will operate normally when the switch is either
inactive or the input is not used.
The Motor Disconnect input is an active-low discrete input that conforms to the following specification:
Low: Vin < 3.5 VDC, or Rin < 375
Ω
(input active, motor movement inhibited)
High: Vin >8 VDC, or Rin > 100k
Ω
(input inactive, motor movement allowed)
Pin Name
Connector
Pin
I/O
+12V OUTPUT
J271
37
Out
LIGHTING BUS GROUND
J271
38
--
DC LIGHTING 1
J271
42
Out
DC LIGHTING 2
J271
43
Out
DC LIGHTING 3
J271
44
Out
PWM LIGHTING 1
J271
45
Out
PWM LIGHTING 2
J271
46
Out
PWM LIGHTING 3
J271
47
Out
Pin Name
Connector
Pin
I/O
LIGHT 2 SWITCH
J271
34
In
LIGHT 1 SWITCH
J271
35
In
ALTERNATING FLASH ON
J271
36
In
Pin Name
Connector
Pin
I/O
MOTOR DISCONNECT
J271
16
In