About this document
RIA45
4
Hauser
NOTICE
This symbol contains information on procedures and other facts which do not result in
personal injury.
1.1.2
Electrical symbols
Symbol
Meaning
Symbol
Meaning
Direct current
Alternating current
Direct current and alternating current
Ground connection
A grounded terminal which, as far as
the operator is concerned, is grounded
via a grounding system.
Symbol
Meaning
Potential equalization connection (PE: protective earth)
Ground terminals that must be connected to ground prior to establishing any other connections.
The ground terminals are located on the interior and exterior of the device:
• Interior ground terminal: potential equalization is connected to the supply network.
• Exterior ground terminal: device is connected to the plant grounding system.
1.1.3
Symbols for certain types of information
Symbol
Meaning
Symbol
Meaning
Permitted
Procedures, processes or actions that
are permitted.
Preferred
Procedures, processes or actions that
are preferred.
Forbidden
Procedures, processes or actions that
are forbidden.
Tip
Indicates additional information.
Reference to documentation
A
Reference to page
Reference to graphic
1.
,
2.
,
3.
…
Series of steps
Result of a step
Visual inspection
