PS Magazine - TB 43-PS-561
PS, The Preventative Maintenance Monthly
ISSUE 561
AUGUST 1999
Precision Lightweight Global Positioning System Receiver . . .
A wrong hookup can lead to the
memory battery getting a charge from
the vehicle battery and the memory bat-
tery exploding. This happens when the
memory battery cap touches a ground-
ed metal object while the PLGR is con-
nected to the vehicle’s power.
stop!
yer
frying
my
brain
!
oops!
i must have
hooked up
the
external power
wrong
.
wire with the in-line fuse is always the
positive or “hot” wire. It is always con-
nected to a positive terminal.
Also, remember that when the ex-
ernal power cable is disconnected
from the PLGR, but still connected to
the vehicle’s power source, your cable
is “hot.”
So when the PLGR is removed from
its external power source because your
mission is over, remove the cable, too.
For those times you can’t remove the
cable, make sure the plug-in is secured
and not allowed to swing around and
make contact with metal.
Step two is to make sure the PLGR
ground is the same as the vehicle
ground. This can be a bit confusing
since most military vehicles have bat-
teries connected in series.
The PLGR grounding wire should
be attached to the same battery post
as the ground wire that runs from
the vehicle to the vehicle’s battery.
An alternative is to attach the
grounding wire to the vehicle body.
Wire with in-line fuse
goes to positive terminal
In-line
fuse
he AN/PSN-11 PLGR can be pow-
ered from an external source using
cable, NSN 6150-01-375-8661. But
you must hook up the cable right! A
cable connected wrong could damage
the PLGR, the cable and you.
Step one in the hookup process is to
make sure you don’t reverse the polar-
ity when attaching the cable to the ve-
hicle power source. A good way to
make sure is to remember that the cable
PS 561
51
AUG 99
PS 561
50
AUG 99
...but this is better
This will work.
..
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