Safety instructions Smartec S CLD134
6 Endress+Hauser
1.5 Notes on safety conventions and symbols
Safety symbols
Electrical symbols
#
Warning!
This symbol alerts you to hazards. They can cause serious damage to the instrument or to persons
if ignored.
"
Caution!
This symbol alerts you to possible faults which could arise from incorrect operation. They could
cause damage to the instrument if ignored.
!
Note!
This symbol indicates important items of information.
%
Direct Current (DC)
A terminal at which DC is applied or through which DC flows.
&
Alternating Current (AC)
A terminal at which (sine-form) AC is applied or through which AC flows.
)
Ground connecting
A terminal, which, from the user’s point of view, is already grounded using a grounding system.
*
Protective ground terminal
A terminal which must be grounded before other connections may be set up.
b
Alarm relay
Input
Output
DC voltage source
Temperature sensor
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