Safety Instrumented System SIS (safety loop)
Two safety standards became effective with the machinery directive. On the one hand, EN ISO 13849-1, which replaces Norm EN 954-1 of the old machinery directive 98/37/EG. On the other hand EN 62061.
Objective of these safety norms is to minimise risks in the operation of machines. Therefore, the requirements for the certification of products for machine and plant manufacturers were increased.
Probability considerations, amongst other things, have an impact on the regulation of the safety of components.
In order to keep the existing residual risk of a machine or plant as low as possible, alarm devices which have a high functional safety are required. They should also alert about danger via visual or audible warning signals.
A hazard graph is not only an important element for the classification of the system or plant, it also clearly illustrates how complex the preliminary work is for the realisation and implementation of projects.
S – Severity of the injury
- S1 = minor injuries (normally reversible)
- S2 = serious injuries, including death (normally irreversible)
F – Frequency and/or length of exposure to the hazard
- F1 = rarely to more often and/or short periods
- F2 = frequently to continuously and/or long duration
P – Possibilities to avoid danger
- P1 = possible under certain conditions
- P2 = barely possible
Brochures / Poster
Facilitate norm-conforming Functional Safety
2-page A1 poster
Safer running of processes and risk minimisation
in the operation of plants and machines Safety-related sounders and flashing lights (Edition 15)
Functional Safety info sheet
EN ISO 13849-1 (PL)
Software assistant SISTEMA
Control safety of machines – easily calculated.
The manufacturer-independent calculation tool SISTEMA, from the German Occupational Health and Safety Department (IFA) helps by the evaluation of safety-related control systems according to EN ISO 13849-1 and simplifies risk analysis.
The Windows tool builds the structure of the safety-related control components (SRF/CS, Safety-Related Parts of a Control System) based on the so-called provided architectures and calculates the reliability values at various detailed levels including the achieved Performance Level (PL).
Please click here to proceed with the download of the Pfannenberg SISTEMA library.
The SISTEMA Cookbook
In order to simplify the handling of SISTEMA software an open series of SISTEMA Cookbooks is available. There are six Cookbooks available which can be downloaded on the website of the German Occupational Health and Safety Department (IFA).
Click here to download the latest versions of the SISTEMA Cookbooks.