BX
688
User
Guide
signal'.
4.
When
GPS
signal
is
not
detected
(e.g.
in
underground
parking),
BX
688
will
stop
alarming.
5.
On
the
back
of
BX
688,
DIP
switch
2
and
3
are
used
to
set
alarm
speed
by
hand.
When
start-up
speed
is
set
by
software
in
computer
through
connecting
with
Data
collection
box,
then
can’t
set
by
hand
any
more.
The
parameter
will
accord
the
computer
setting
through
connecting
with
Data
collection
box.
BX
688
video
output
function
*
Only
for
the
BX
688
V4
Commercial
Professional
Version
with
video
output
For
the
BX
688
V4
Commercial
Professional
Version,
it
has
a
RCA
video
socket,
which
can
output
NTSC
video
signal
(We
can
also
customize
PAL
signal
Power Supply
BX
688
power
input
is
9V-32V,
it
works
with
both
12V
and
24V
power,
fit
for
the
gas
car
and
diesel
vehicle.
It
has
good
peak-voltage
protection
measures.
Driver
Fatigue
Monitor
System
is
with
low
power
consumption,
in
the
12V
cases,
the
average
current
is
less
than
100mA,
while
in
the
24V,
the
average
current
is
about
60mA.
AVL System (GPS) Connection - Alarm Signal Interface
Lead’s color
Pin number Definition of signal
Red
pin-1
Power+
，
DC12V/DC24V
Black
pin-2
Power-
，
GND
Yellow
pin-3
Signal output of” fatigue warning”,
When fatigue detector alarming, output low level(0V);
When alarm stopped, output high level(4.2V)
Blue
pin-4
Signal output of “no portrait warning”
When portrait not detected, output low level(0V);
When portrait detected, output high level(4.2V)
Note:
Please
do
not
touch
the
power+
to
the
input
and
output
signal
lines.
Because
it
will
damage
the
BX
688.
Please
do
not
connect
BX
688's
power
input
via
5
Pin
cable
and
cigarette
lighter
adapter
at
the
same
time,
otherwise
it
may
burn
BX
688.
BX
688
RCA video socket
5pin SM plug
