Safety Symbols
The general definitions of safety symbols used on equipment or in manuals are listed below.
Direct current.
Alternating current.
Earth (ground) terminal.
Protective conductor terminal. For protection against electrical shock in case of a fault. Used
with field wiring terminals to indicate the terminal which must be connected to ground before
operating equipment.
Frame or chassis terminal. A connection to the frame (chassis) of the equipment which normally
includes all exposed metal structures.
Grounded terminal which indicates the earth potential.
On supply.
Off supply.
Standby supply. The equipment will be marked with this symbol is not completely disconnected
from AC mains when power switch is in the standby position.
In position of a bi-stable push switch.
Out position of a bi-stable push switch.
Hazardous voltage and potential for electrical shock. Do not touch terminals that have this
symbol when the equipment is on.
Hot surface. Avoid contact. Surfaces are hot and may cause personal injury if touched.
Caution, refer to accompanying documentation. The equipment will be marked with this symbol
when it is necessary for the user to refer to the instruction manual.
The warning 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
in injury or death to personal.
The caution sign denotes a hazard. It calls attention to an operating procedure,
practice, condition or the like, which, if not correctly performed or adhered to,
could result in damage to or destruction of part or all of the equipment.
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