MFJ MFJ-4418, Инструкция по эксплуатации

Страница: 9 / 20

Internal Settings and Fuses
Figure 8 Board Parts Locations
JP2: The jumper is accessible by removing the bottom cover. Set the jumper for
UNSWITCHED
(jumper 1 to 2, default) or
IGNITION SENSE
(jumper 2 to 3). “Unswitched”
powers the microcontroller from the battery input and the “Ignition Sense” from the ignition
sense line.
F1 Fuse:
The fuse is accessible by removing the bottom cover. This fuse is a 30A automotive
blade type. Do not use a fuse of a higher current rating.
Operation:
Once wired in the MFJ-4418 will boost the incoming voltage to 13.8V when enabled for any
voltage between the minimum voltage and 13.8V. If the incoming voltage is above what the
output voltage is set to the output voltage will rise to the incoming voltage minus about a half
volt. When the MFJ-4418 is not energized the input voltage is passed to the output connectors
and has about a half volt drop due to the internal rectifiers.
There are protective diodes that protect the input and output from exceeding 18V or being
reverse wired.
The MFJ-4418 is not designed to boost the voltage of a 6V electrical system up to 13V and will
not run on a positive ground system. It will also not reduce the voltage of a 24V or higher system
to 13V.
Fuse F1
Jumper JP2