Siemens SIMATIC S7-300 - Manual (Page 2)

Safety Guidelines
This manual contains notices you have to observe in order to ensure your personal safety, as well as to prevent
damage to property. The notices referring to your personal safety are highlighted in the manual by a safety alert
symbol, notices referring only to property damage have no safety alert symbol. These notices shown below are
graded according to the degree of danger.
If more than one degree of danger is present, the warning notice representing the highest degree of danger will be
used. A notice warning of injury to persons with a safety alert symbol may also include a warning relating to prop-
erty damage.
Qualified Personnel
The device/system may only be set up and used in conjunction with this documentation. Commissioning and oper-
ation of a device/system may only be performed by qualified personnel. Within the context of the safety notes in
this documentation qualified persons are defined as persons who are authorized to commission, ground and label
devices, systems and circuits in accordance with established safety practices and standards.
Danger
indicates that death or severe personal injury will result if proper precautions are not taken.
Warning
indicates that death or severe personal injury may result if proper precautions are not taken.
Caution
with a safety alert symbol, indicates that minor personal injury can result if proper precautions are not taken.
Caution
without a safety alert symbol, indicates that property damage can result if proper precautions are not taken.
Notice
indicates that an unintended result or situation can occur if the corresponding information is not taken into account.