Safety
Symbols
General
denitions
of
safety
symbols
used
on
equipment
or
in
manuals
.
Instruction
manual
symbol:
the
product
is
marked
with
this
symbol
when
it
is
necessary
for
the
user
to
refer
to
the
instruction
manual
in
order
to
protect
against
damage
to
the
instrument.
Indicates
dangerous
voltage
(terminals
fed
from
the
interior
by
voltage
exceeding
1000
volts
must
be
so
marked).
Protective
conductor
terminal.
F
or
protection
against
electrical
shock
in
case
of
a
fault.
Used
with
wiring
terminals
to
indicate
the
terminal
that
must
be
connected
to
ground
before
operating
equipment.
Low-noise
or
noiseless
,
clean
ground
(earth)
terminal.
Used
for
a
signal
common,
as
well
as
providing
protection
against
electrical
shock
in
case
of
fault.
A
terminal
marked
with
this
symbol
must
be
connected
to
ground
in
the
manner
described
in
the
installation
(Operation)
manual,
and
before
operating
the
equipment.
Frame
or
chassis
terminal.
A
connection
to
the
frame
(chassis)
of
the
equipment
which
normally
includes
all
exposed
metal
structures
.
Alternating
current
(power
line).
Direct
current
(power
line).
Alternating
or
direct
current
(power
line).
W
arning
denotes
a
hazard.
It
calls
attention
to
a
procedure
,
practice
,
condition
or
the
like
,
which,
if
not
correctly
performed
or
adhered
to
,
could
result
in
injury
or
death
to
personnel.
Caution
sign
denotes
a
hazard.
It
calls
attention
to
a
procedure
,
practice
,
condition
or
the
like
,
which,
if
not
correctly
performed
or
adhered
to
,
could
result
damage
to
or
destruction
of
part
or
all
of
the
product.
Note
denotes
important
information.
It
calls
attention
to
a
procedure
,
practice
,
condition
or
the
like
,
which
is
essential
to
highlight.
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