190-01115-01
G3X/G3X Touch Installation Manual - LRU Pinouts
Rev. AC
Page 25-6
25.1.7
Flap Inputs
The GAD 27 has 4 active low Flap discrete inputs that allow for manual control of flap motors. Pilot
switches (#1 switches) take priority over copilot switches when they disagree unless pilot switches are both
inactive. Flap Limit Up and Flap Limit Down switches (optional) can be used to indicate point of
maximum travel. A GEA 24 or GSU 73 must be used to monitor a flap position sensor if predefined
positions are to be used.
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)
25.1.8
Lighting Bus
The GAD 27 can monitor from 1 to 3 lighting bus control inputs, supply up to 3 DC lighting outputs, and
up to 3 PWM lighting outputs. The +12V OUTPUT pin can be used to provide supply voltage for
potentiometer inputs used to vary the lighting bus outputs. The DC Lighting outputs provide a reference
voltage only, 10mA max, and do not power lights. Attempting to source more than 10 mA of current from
these DC reference outputs may damage them.
The DC Lighting outputs are a variable DC voltage (output voltage is based on the lighting control input
voltage) that is used to vary the brightness of the lighting.
The PWM lighting outputs (pins 45, 46, 47) are active low, and can sink a maximum of 500 mA average
current. The pulse width modulation (PWM) of the output signal (square wave) is varied to control the
brightness of the lighting.
Lighting Bus Inputs
Pin Name
Connector
Pin
I/O
FLAP UP 1 SWITCH
J271
18
In
FLAP DOWN 1 SWITCH
J271
19
In
FLAP UP 2 SWITCH
J271
20
In
FLAP DOWN 2 SWITCH
J271
21
In
FLAP LIMIT UP
J271
22
In
FLAP LIMIT DOWN
J271
23
In
Pin Name
Connector
Pin
I/O
LIGHTING BUS GROUND
J271
38
--
LIGHTING CONTROL IN 1
J271
39
In
LIGHTING CONTROL IN 2
J271
40
In
LIGHTING CONTROL IN 3
J271
41
In
