Copyright © 2005, IEC The content of the web pages within the IEC Functional Safety Zone may be freely reproduced, except for advertising, endorsement or commercial purposes, under the following terms and conditions.

1 Any reproduction from the IEC Functional Safety Zone must include the following text (with "IEC Functional Safety Zone" containing a link to http://www.iec.ch/functionalsafety, as below):

"This text contains extracts from the IEC Functional Safety Zone. All such extracts are copyright of International Electrotechnical Commission © 2005, IEC, Geneva, Switzerland. All rights reserved. IEC has no responsibility for the placement and context in which the extracts are reproduced. This notice takes precedence over any general copyright statement."

2 If you want to reproduce from a frequently asked question you must include the question and answer in its entirity.

3 This notice takes precedence over the general copyright statement.