AirLink LX60 Series Hardware User Guide
Rev. 2 June 2021
20
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Pin 4 (GPIO)—Use the green wire for I/O configurations. See
Vehicle Installation Considerations
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 LX60 is grounded. (See
Step 2—Mount and Ground the LX60
6.
Use a 4 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 (On/Off control) on the DC power cable to the ignition signal
from the vehicle.
8.
Connect the DC power cable to the LX60.
9.
Reconnect the vehicle’s battery:
a.
Connect the positive terminal
first
.
b.
Connect the negative terminal.
Vehicle Installation: Option 1
This vehicle installation allows the router to operate with the vehicle, in that when the
vehicle ignition is off, the router is off. For vehicle installations, Sierra Wireless
recommends connecting the white On/Off control wire to the vehicle’s ignition switch, as
shown in the following illustration.
Figure 2-8: Vehicle Installation Option 1
4
MP70 router
Power
Ignition Sense
I/O
Ground
-
+
Battery
Ignition
1
3
2
7.5 A Fuse
Vehicle firewall
Vehicle fuse box
Vehicle cabin
Engine compartment
LX60
Battery
2 Ground
4 I/O
1 Power
3 On/Off
Ignition
–
+
Engine compartment
Vehicle firewall
Vehicle cabin
Vehicle fuse box
4 A fuse