The MTTF value is a term from the field of risk analysis & risk evaluation. The exact meaning is m ean t ime t o f ailure or simply the mean life of a component. The MTTF has gained particular relevance due to EN ISO 13849-1. In accordance with this standard, …
Functional safety (SIL)
Load pins: Redundancy and safety
| Markus Heidl | Know-howA load pin connects the force-transmitting machinery elements and at the same time enables the measurement of the force. In addition to the general detection of static or dynamic forces by the load pins, the safety that can be ensured by various systems also plays an …
What is meant by diagnostic coverage?
| Stefan Heusel | Know-howAn important parameter in the use of pressure sensors in safety devices is the so-called “Diagnostic Coverage” (DC). However, since single-channel, in particular, but also two-channel safety circuits often malfunction or may be defective, a known diagnostic …
SIL? PL? What is the probability of failure of a safety function?
| Stefan Heusel | Know-howCustomers often ask us: “Can my product be part of a safety function? Which standards or directives apply in this case?” The most important safety directives and standards available today are SIL (Safety Integrity Level) and PL (Performance Level). These …
SIL 2 and SIL 2 does not automatically equal SIL 2
| Stefan Heusel | Know-howWhen using pressure sensors in safety-relevant applications, sooner or later one must ask the question whether the SIL evaluation of the proposed pressure sensor is sufficient for the application. Often, the user tends to favour pressure sensors with higher SIL …