11
actively
drive
these
pins
high
or
low.
The
embedded
software
UI
allows
you
to
read
and
set
the
value
to
the
connected
device.
The
power
input
voltage
of
logic
low
is
DC
0~10V.
Logic
high
is
DC
11~30V
.
Wire
the
digital
input
just
like
wiring
the
power
input
introduced
in
chapter
2.2.
2.4
Wiring
Digital
Output
The
switch
provides
2
digital
outputs,
also
known
as
Relay
Output.
The
relay
contacts
are
energized
(open)
for
normal
operation
and
will
close
for
fault
conditions.
The
fault
conditions
include
power
failure,
Ethernet
port
link
break
or
other
pre
‐
defined
events
which
can
be
configured
in
the
switch
UI.
Wiring
digital
output
is
exactly
the
same
as
wiring
power
input
introduced
in
chapter
2.2.
2.5
Wiring
Earth
Ground
To
ensure
the
system
will
not
be
damaged
by
noise
or
any
electrical
shock,
we
suggest
you
to
make
exact
connection
with
the
Earth
Ground.
On
the
bottom
side
of
the
switch,
there
is
one
earth
ground
screw.
Loosen
the
earth
ground
screw
by
screw
drive;
then
tighten
the
screw
after
earth
ground
wire
is
connected.
