AirLink MP595 / MP595W Modem User Guide
28
2130795
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 27.
•
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
configuration,
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
3G
Watcher.
See
the
online
help
in
3G
Watcher
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.
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
Summary of Contents for AirLink 595W
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