AirLink MP70 Hardware User Guide
Rev 4 Nov.16
16
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Connect the Router to the Vehicle’s Electrical
System
To connect the router to the vehicle’s electrical system:
1.
Ensure that the vehicle is turned off.
2.
Remove the key from the ignition.
3.
Disconnect the vehicle’s battery:
a.
Disconnect the negative terminal
first
.
b.
Disconnect the positive terminal.
4.
Connect the black (ground) wire on the DC power cable to the vehicle
chassis.
5.
Ensure that the MP70 is grounded. (See
6.
Use a 7.5 A, fast blow fuse, recommended to have no more than +/- 10% de-
rating over the operating temperature range, to connect the red (power) wire
on the DC power cable to the vehicle’s fuse box. (See
.)
7.
Connect the white wire (Ignition) on the DC power cable to the ignition signal
from the vehicle.
8.
Connect the DC power cable to the MP70.
9.
Reconnect the vehicle’s battery:
a.
Connect the positive terminal
first
.
b.
Connect the negative terminal.
3
Ignition
Sense
White
Ignition Sense: Connected to the vehicle ignition or an external
switch. The MP70 is off when this pin is either open-circuit or
grounded, and on when this pin is connected to power.
Note: If you do not connect pin 3 to the ignition, you MUST
connect it to the positive terminal of your power supply or
battery. If you are using a Sierra Wireless AC adapter, the
connection is inside the cable.
I
4
GPIO
Green
User configurable digital input/output or analog voltage sensing
input. Connect to switch, relay or external device. For more
information, see
on page 19 and refer to the
ALEOS Software Configuration User Guide.
I/O
Table 2-2: Power Connector Pin and DC Cable Wires
Pin
Name
Associated DC
Cable Wire Color
Description
Type
