Field Xpert
1 Safety
Hauser
5
1.6
Conventions and icons
In order to highlight safety relevant or alternative operating procedures in the manual, the following
conventions have been used, each indicated by a corresponding icon in the margin.
Safety conventions
Explosion protection
Electrical symbols
Icon
Meaning
DANGER!
This symbol alerts you to a dangerous situation. Failure to avoid this situation will result in
serious or fatal injury.
WARNING!
This symbol alerts you to a dangerous situation. Failure to avoid this situation can result in
serious or fatal injury.
CAUTION!
This symbol alerts you to a dangerous situation. Failure to avoid this situation can result in minor
or medium injury.
NOTE!
This symbol contains information on procedures and other facts which do not result in personal
injury.
Symbol
Meaning
Explosion-proof equipment which has undergone type examination
If this symbol is on the nameplate of the device, the device can be installed in accordance with the approval
in a hazardous or non-hazardous area.
Hazardous areas
This symbol is used in the drawings in these Operating Instructions to indicate a hazardous area.
– Devices located in hazardous areas or the wiring for such devices must have the relevant explosion pro-
tection.
Safe area (non-hazardous area)
This symbol is used in the drawings in these Operating Instructions to indicate a non-hazardous area.
– Devices located in non-hazardous areas must also be certified if connecting cables enter the hazardous
area.
Symbol
Meaning
DC
A terminal at which DC is present or through which DC flows.
AC
A terminal at which (sine-wave) AC is present or through which AC flows.
Ground connection
A grounded terminal which, from the user's point of view, is already grounded by means of a grounding sys-
tem.
Protective ground connection
A terminal which must be grounded before making any other connections can be made.
Equipotential connection
A connection which must be connected to the grounding system of the plant. This may be, for example, an
equipotential line or star grounding system, depending on national or company procedures.
