Characteristic parameters, selection aid and risk parameters

The SIL characteristic parameters in accordance with 61508/SILCL, EN IEC 62061 or PL in accordance with EN ISO 13849-1 are specified in the technical data of our safety products.


The SISTEMA PC software of the German Institute for Occupational Safety and Health (IFA) is used for the automatic calculation and evaluation of the functional safety of control systems in accordance with EN ISO 13849‑1. It is an ideal complement to Safexpert and can be downloaded as freeware from It includes a components library with the safety-related parameters of selected Leuze electronic products. For further information, see chapter 2.4.1.

Help with selecting Leuze electronic protective devices

In the event that no regional or machine-specific specifications, such as European C-standards or OSHA /ANSI standards specify specific types of optoelectronic protective devices, the following selection aid can be used to select the appropriate Leuze electronic safety sensor for the risk minimization. The qualitative method presented in EN ISO 13849-1 is used for determining the required safety level. A risk assessment, e.g. in accordance with EN ISO 12100 must generally be performed beforehand and the previous notes of chapter 4.2.1 must be observed.

IEC TS 62046 recommends across the board:

With low risk: Type 2 AOPD and higher
With medium risk: Type 3 AOPD (safety laser scanners) or type 4 safety light curtains
With high risk: Type 4 AOPD


Safety notice

The selection of the appropriate type of protective devices for sufficient risk reduction is always the responsibility of the machine constructor or system integrator. No legal claims can be derived from the following selection aid. Regional laws or machine-specific specifications, reasons for product liability or the amount of the material damage can result in the selection of another type of protective device with higher safety-related capacity, contrary to the presented recommendation. If the possibility of serious, irreversible injuries exists, we recommend using an AOPD of at least type 3.


Risk parameters:

S Seriousness of injury
S1 Minor (usually reversible) injury
S2 Serious (usually irreversible injury including death)
F Frequency and/or duration of the exposure to the hazard
F1 Seldom to not very frequent and/or exposure to hazard is brief
F2 Frequent to continuous and/or exposure to hazard is long
P Possibility of preventing the hazard or limiting the harm
P1 Possible under certain conditions
P2 Not really possible