Application document for functional safety STO, SS1 (ISO 13849-1)
Compact User Manual, 09/2016, A5E34871844AM
11
Introduction
The safety functional examples are non-binding and do not claim to be complete in respect
of configuration, equipment or practical eventualities. The safety functional examples are not
customer-specific solutions but are only intended to facilitate the performance of typical
tasks. You are responsible for ensuring that the products described are used correctly.
These safety functional examples do not relieve you of the obligation to use the products
safely during application, installation, operation and maintenance. By using these safety
functional examples, you acknowledge the fact that Siemens cannot be held liable for any
claims or damages above and beyond the liability described above. We reserve the right to
make changes to these safety function examples at any time without prior notice. In the case
of any differences between the suggestions made in these safety function examples and
other publications from Siemens, such as catalogs, the contents of the other documentation
have priority.
In DIN EN 60204-1: 2007 a distinction is made between three stop categories to stop
machines: Stop categories 0, 1 and 2
The stop category to be used must be defined based on the risk assessment of the
particular machine.
The safety functions listed here are in conformance with:
● Safety Integrity Level (SIL) 2 according to DIN EN 61508
● Category 3 according to DIN EN ISO 13849-1
● Safety of machinery - functional safety according to EN 62061
● Performance Level (PL) d according to DIN EN ISO 13849-1
The safety functions correspond to the functions according to DIN EN 61800-5-2.
This application document explains stop categories 0 and 1.
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