8
of
10
MN301200
Rev
A
WIRING
Step
Five
ELECTRICAL
CONNECTIONS:
The
LV41
and
LV42
series
feature
a
SPDT
relay
contact.
SPDT,
single
pole
double
throw
allows
for
operation
of
both
increasing
and
decreasing
level,
depending
on
the
connections
made
between
the
terminals
of
the
micro
‐
switch
and
the
cable.
SPDT,
which
is
a
three
‐
conductor
cable,
has
one
lead
that
is
common,
one
that
is
normally
open
(NO),
and
the
other
that
is
normally
closed
(NC).
For
the
proper
connections
of
these
conductors
please
refer
to
the
wiring
diagrams
below.
NC
Wiring:
The
Normally
Closed
(NC)
wiring
is
typically
used
for
a
filling
operation.
The
contact
will
close
at
a
low
level
and
open
at
a
high
level.
NO
Wiring:
The
Normally
Open
(NO)
wiring
is
typically
used
for
an
emptying
operation.
The
contact
will
close
at
a
high
level
and
open
at
a
low
level.
Warning:
When
making
the
connections
described
above,
ensure
that
the
maximum
motor
power
does
not
exceed
the
values
indicated
on
the
level
switch.
The
power
supply
cable
is
an
important
part
of
the
sump
float.
Should
the
cable
appear
to
be
damaged,
discontinue
use
immediately
and
proceed
to
replace
the
unit.
The
terminal
used
must
also
be
protected
against
accidental
break.
Also,
correctly
insulate
any
wire
not
in
use.
