190-01115-01
G3X/G3X Touch Installation Manual - LRU Pinouts
Rev. AC
Page 25-5
25.1.4
Power
GAD 27 POWER IN (+14V only) is the GAD 27 unit power input and is internally diode OR’d with the
Keep Alive bus (TB273) to provide power redundancy.
25.1.5
CAN Bus
The CAN Bus conforms to the BOSCH standard for Controller Area Network 2.0-B, and complies with
ISO 11898. Pin 3 is used to terminate the CAN bus (only if a CAN termination adapter is not used as
shown in
). To terminate the CAN bus at the GAD 27 short the pins (2 and 3) together.
Refer to
for details on configuring and terminating the CAN bus. The CAN bus on J271
is used for communications between G3X LRUs.
25.1.6
Discrete Inputs
The GAD 27 has 9 discrete inputs that can be configured as Active Low or Active High. The GAD 27
discrete inputs conform to the following specification:
Low: Vin < 3.5 VDC, or Rin < 375
Ω
High: Vin > 8 VDC, or Rin > 100k
Ω
Note that a floating (disconnected) input on Discrete Inputs 1-7 will be treated as High, while a floating
input on Discrete Inputs 8-9 will be treated as Low.
Pin Name
Connector
Pin
I/O
GAD 27 POWER IN
J271
7
In
GAD 27 POWER GND
J271
8
--
Pin Name
Connector
Pin
I/O
CAN HI
J271
1
I/O
CAN LO
J271
2
I/O
CAN TERMINATE
J271
3
--
Pin Name
Connector
Pin
I/O
DISCRETE IN 1
J271
9
In
DISCRETE IN 2
J271
10
In
DISCRETE IN 3
J271
11
In
DISCRETE IN 4
J271
12
In
DISCRETE IN 5
J271
13
In
DISCRETE IN 6
J271
14
In
DISCRETE IN 7
J271
15
In
DISCRETE IN 8
J271
48
In
DISCRETE IN 9
J271
49
In
