Table of Contents
Advertisement
MP 555 GPS Vehicle Installation Guide
Note: If you choose to install a
separate switch, it must still be
connected to the white gnition
sense wire, not the red battery
wire, so that the modem can
perform a controlled shutdown,
as described on page 21.
22
(under software control), de-registering and saving any
relevant operational data before powering off.
Ignition sense options
There are three ways to connect the ignition sense wiring:
•
Engine on only. The white ignition sense wire can be
connected to the vehicle's ignition switch so that the
MP 555 GPS is powered on only when the ignition key is
switched to the full "On" position, i.e. when the engine has
been started. In this configuration, the engine must be
running for the modem to be on.
—or—
•
Accessory on. The white ignition sense wire can be
connected to the vehicle's ignition switch so that the
MP 555 GPS is powered on when the ignition is switched
to "Accessory" mode. In this configuration, the modem is
on
whenever other vehicle electrical devices can be switched
on
—such as when the radio and windshield fan can run.
—or—
•
Separately switched. The white ignition sense wire can be
connected to a separate switch, mounted under the
dashboard or in another convenient location, which allows
i
the MP 555 GPS to be turned on or off regardless of the
position of the ignition key. In this configuration, the
modem can be powered on or off even if the key is not in the
ignition.
The modem also has a "Power Off Timer". When power is
removed from the ignition sense wire, the modem remains on
for the period defined by the Power Off Timer. The maximum
duration is four hours.) The Power Off Timer is configured in
Watcher. See the online help for details.
Power Harness Grounding
The black ground wire from the power harness must be
connected to the grounded negative terminal of the vehicle
battery, or another appropriate electrical ground if you are
using an alternate power source. Failing to ground the power
harness properly may damage the MP 555 GPS, may cause
radio interference, and can be dangerous. (See "Grounding the
Modem" on page 18.
The ground wire in the MP 555 GPS power harness is not
fused.
)
(
2130297
Advertisement
Table of Contents
