1 Safety
Field Xpert
4
Hauser
1.6
Conventions used in this manual
Typographical highlighting and symbols have been used in these Operating Instructions, in order to
structure the content as clearly as possible and to highlight important information.
Always note the safety instructions and symbols in these Operating Instructions.
Safety instructions
Explosion protection
Electrical symbols
Symbol
Meaning
Note!
A note indicates actions or procedures which, if not performed correctly, may indirectly affect operation or
may result in a device response which is not planned.
Caution!
Caution indicates actions or procedures which, if not performed correctly, may result in personal injury or
incorrect operation of the device.
Warning!
Warning indicates actions or procedures which, if not performed correctly, may result in serious personal
injury, a safety hazard or the destruction of the device.
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
system.
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.
