Siemens Simatic S7-400 - Manual (Page 2)

!
Danger
indicates that death, severe personal injury or substantial property damage will result if proper precau-
tions are not taken.
!
Warning
indicates that death, severe personal injury or substantial property damage can result if proper
precautions are not taken.
!
Caution
indicates that minor personal injury can result if proper precautions are not taken.
Caution
indicates that property damage can result if proper precautions are not taken.
Notice
draws your attention to particularly important information on the product, handling the product, or to a
particular part of the documentation.
Qualified Personnel
Only qualified personnel should be allowed to install and work on this equipment. Qualified persons
are defined as persons who are authorized to commission, to ground and to tag circuits, equipment, and
systems in accordance with established safety practices and standards.
Correct Usage
Note the following:
!
Warning
This device and its components may only be used for the applications described in the catalog or the
technical description, and only in connection with devices or components from other manufacturers
which have been approved or recommended by Siemens.
This product can only function correctly and safely if it is transported, stored, set up, and installed
correctly, and operated and maintained as recommended.
Trademarks
SIMATIC  , SIMATIC HMI  and SIMATIC NET  are registered trademarks of SIEMENS AG.
Third parties using for their own purposes any other names in this document which refer to trademarks
might infringe upon the rights of the trademark owners.
Safety Guidelines
This manual contains notices intended to ensure personal safety, as well as to protect the products and
connected equipment against damage. These notices are highlighted by the symbols shown below and
graded according to severity by the following texts:
We have checked the contents of this manual for agreement
with the hardware and software described. Since deviations
cannot be precluded entirely, we cannot guarantee full
agreement. However, the data in this manual are reviewed
regularly and any necessary corrections included in
subsequent editions. Suggestions for improvement are
welcomed.
Disclaim of Liability Copyright W Siemens AG 1999-2003 All rights reserved
The reproduction, transmission or use of this document or its
contents is not permitted without express written authority.
Offenders will be liable for damages. All rights, including
rights created by patent grant or registration of a utility model
or design, are reserved.
Siemens AG
Bereich Automation and Drives
Geschaeftsgebiet Industrial Automation Systems
Postfach 4848, D- 90327 Nuernberg
 Siemens AG 1999-2003
Technical data subject to change.
Siemens Aktiengesellschaft A5E000069467-07