Sierra Wireless AirLink MP, Руководство пользователя

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Hardware and Software Installation
Rev 1.0 Mar.10 27
• Engine on only. Connect the white ignition sense wire to the vehicle’s
ignition switch so that the MP modem is powered on only when the ignition
key is switched to the full “On” position, that is, when the engine has been
started. In this configuration,
the engine must be running for the MP modem
to be on.
—or—
• Accessory on. Connect the white ignition sense wire to the vehicle’s ignition
switch so that the MP modem is powered on when the ignition is switched to
“Accessory” mode. In this configuration, the MP modem is on
whenever other
vehicle electrical devices can be switched on —such as when the radio and
windshield fan can run.
—or—
Note: If you choose to
install a separate switch, it
must be connected to the
white ignition sense wire,
not the red battery wire, so
that the MP modem can
perform a controlled
shutdown, as described on
page 26 .
• Separately switched. Connect the white ignition sense wire to a separate
switch mounted in a convenient location, which allows the MP modem to be
turned on or off regardless of the position of the ignition key. In this configu-
ration, the MP modem can be powered on or off
even if the key is not in the
ignition.
The MP modem also has a “Power Off Timer”. When power is removed from the
ignition sense wire, the MP modem remains on for the period defined by the
Power Off Timer, up to a maximum of 240 minutes. The Power Off Timer is
configured in ACEview. See the online help in ACEview for details.
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 22.) 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.