Sierra Wireless AirLink MP890, User Manual

Page: 38 / 67

AirLink MP User Guide
30 2130795
Ground the power harness
You must connect the black ground wire from the power harness to the grounded
negative terminal of the vehicle battery, or another appropriate electrical ground.
Failing to ground the power harness properly may damage the MP modem, may
cause radio interference, and can be dangerous. (See
Ground the MP modem on
page 24.) The ground wire in the MP modem power harness is not fused.
Power connections
Connecting the MP modem’s power wires properly is important—poor
connections can damage the wiring, the MP modem, or the vehicle’s electrical
system, and can be dangerous.
Note: Ensure that all wires
are correctly spliced or
crimped. Improper
grounding and wire
connections may lead to
equipment damage or
safety hazards.
Correct wire splicing
You can splice the wires of the power harness to the car wiring. Proper splicing is
essential to reliable operation of the MP modem. Do
NOT use “quick taps”; they
reduce the integrity of the wire that is cut and let moisture into the cable.
An appropriate method of splicing is to strip a small portion of the insulation,
solder the wires together, then heat-shrink the connection to re-insulate it.
Crimp terminals
If suitable terminal connection points are available on the vehicle for power and
ignition sense, then using automotive crimp terminals is recommended. When
using crimp terminals, do not leave bare wire exposed. Do not use a crimp
terminal for more than one wire unless it is designed for that purpose.
Office installation
Use the AC/DC adapter available from Sierra Wireless to connect the power
harness to a standard outlet.
Step 4—Connect the MP modem to computer
cable
The MP modem connects to:
• A computer through a USB, Ethernet, or serial port
• Other optional devices through the DB15HD I/O connector
Note: Do not connect the MP modem to the computer until you have installed the
software.
The MP modem connects to a computer using:
• A USB cable (with a Type A connector on the computer end and a Type B
connector on the MP modem end). The maximum of the USB cable is 5.5 m
(18 feet). These cables are readily available from many suppliers.