Garmin G3X Installation Manual page 296

23.1.4 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.
GAD 27 POWER IN
GAD 27 POWER GND
23.1.5 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 Section 2.3.1.3.3). To terminate the CAN bus at the GAD 27 short the pins (2 and 3) together.
Refer to Section 2.3.1.3.2
is used for communications between G3X LRUs.
CAN HI
CAN LO
CAN TERMINATE
23.1.6 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 Low, while a floating
input on Discrete Inputs 8-9 will be treated as High.
DISCRETE IN 1
DISCRETE IN 2
DISCRETE IN 3
DISCRETE IN 4
DISCRETE IN 5
DISCRETE IN 6
DISCRETE IN 7
DISCRETE IN 8
DISCRETE IN 9
190-01115-01
Rev. AA
Pin Name
for details on configuring and terminating the CAN bus. The CAN bus on J271
Pin Name
Pin Name
Connector
J271
J271
Connector
J271
J271
J271
Connector
J271
J271
J271
J271
J271
J271
J271
J271
J271
G3X/G3X Touch Installation Manual - LRU Pinouts
Pin I/O
7 In
8 --
Pin I/O
1 I/O
2 I/O
3 --
Pin I/O
9 In
10 In
11 In
12 In
13 In
14 In
15 In
48 In
49 In
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