Siemens QUADLOG, Installation And Service Instruction, Page: 11 / 66

SD39RIO-1 INTRODUCTION
January 2001
1-5
1.3 International Standards Organization (ISO) Symbols
Refer to Table 1-2 for an explanation of ISO (International Standards Organization) and IEC (International
Electrotechnical Commision) symbols that, when appropriate, are prominently displayed on the surfaces of
hardware. The symbols are also used in instructions to denote
CAUTION and WARNING notes.
Table 1-2 ISO/IEC Symbols
Symbol Publication Description
Background Color = Yellow
Symbol Color = Black
Outline Color = Black
ISO 3864,
No. B.3.6
WARNING: Risk of Electric Shock . The symbol is
prominently displayed on the surfaces of hardware. When
used in an instruction, text accompanies the symbol to identify
something that can be dangerous and possibly life threatening
to personnel. For example:
WARNING: Risk of electric shock. Remove power from
all involved wires before making connections to the
Marshalled Termination Assembly.
Background Color = Yellow
Symbol Color = Black
Outline Color = Black
ISO 3864,
No. B.3.1
CAUTION : Refer to accompanying Installation and Service
Instruction. The symbol is prominently displayed on the
surfaces of hardware. When used in an instruction, text
accompanies the symbol to identify something that can
damage equipment or cause a control problem with a process.
For example:
CAUTION: The safety system should not be operated
with forced I/O.
Background Color = White
Symbol Color = Black
Outline Color = Black
IEC 417,
No. 5019
PROTECTIVE CONDUCTOR TERMINAL
Symbol is prominently displayed on the surfaces of hardware.