TUV ASI TÜV Cooperation Functional Safety
TÜV Süddeutschland

TÜV Certification Policy

29. January 2001


The purpose of this paper is to summarize the test and certification policies used during a TUV certification of a safety component/subsystem. These components/subsystems are typically electrical/electronic/ programmable electronic systems.

What does the end user get with the certificate?

The end user can be assured, the certified component/subsystem (e.g. PLC, sensor, actuator) was assessed by an independent approval agency against the requirements of the applied standards. The most used standards are:

The set of used standards is always stated on the certificate.

The certificate shows, that a component/subsystem can be used in a specific application according to a requirement class (RC) or a integrity level (SIL).

The system integrator and end user must always be aware of how to use certified components/subsystems in safety-related function, respectively  a safety instrumented system. Because of the many different possibilities, how to configure a safety system, the end user must get the related information from the manufacturer of the certified component/subsystem.

Safety Guidelines/TUV Guidelines

The safety guidelines are part of the assessment process. Because these guidelines are often established during the TUV assessment, they are sometimes called "TUV Guidelines". Formerly they were called TUV restrictions and were published in the TUV test report. Nowadays we strongly recommend to publish this information as part of the user documentation. Typically this part of the user documentation is called "safety handbook/safety manual".

On every TUV certificate there is a reference, where the safety guidelines for the use of the component/subsystem are documented. The typical paragraph on a  certificate is:
"Besondere Bedingungen/Specific Requirements:
The TUV Guidance is contained in the user manuals XXXX and YYYY and must be considered for safety relevant applications"

Publication Requirement:
The certificate and the safety guidelines must be accessible by the end user and system integrator.

Publication Recommendation:
All certificates should not only be published on paper. We recommend to put an image of the certificate, together with the safety guidelines, on the internet by each manufacturer. Some certificates already reside as PDF copies on this server, and there are links to some user documentation.

The manufacturers, system integrators and end users are responsible for publication and information on how to apply the safety guidelines. This can not be the responsibility of the certification agencies.
All needed information is published on the certificate.

TÜV Rheinland Group
TÜV Rheinland Industrie Service GmbH
Automation - Software - Information Technology (ASI)

Germany: Heinz Gall ph: +49-221-806-1790
Germany: Stephan Häb ph: +49-221-806-2310
USA: Joseph Lenner
ph: +1-617-447-6120
USA: Kevin Eldridge ph: +1-978-266-9500
Japan: Joachim Iden ph: +81-6-6355-5732
China: Bin Zhao ph: +85-104 86 10 6566 6660-104

Homepage: http://www.tuvasi.com
TÜV Automotive / TÜV Product Service
Automation, Software and Electronics
Ridlerstrasse 65
D-80339 Munich/Germany

Nat. / Internat. : Jürgen Blum ph: +49-89-5791-2275
Nat. / Internat. : Günter Greil ph: +49-89-5791-2278
USA: Karen Grantham
ph: +1-858-566-2556
Japan: Asai Yoshinaho ph: +81-3-3372-4294
Asia Pacific: Peerasan Supavatanakul

AHomepage: http://www.tuev-sued.de/rail/maschinensicherheitsbauteile_/_steuerungen