Slide 1 Slide 2 Slide 3 Slide 4 Slide 5 Slide 6 Slide 7 Slide 8 Slide 9 Slide 10 Slide 11 Slide 12 Slide 13 Slide 14 Product List
sil ple
SIL rating indicates how much the system is designed to reduce risk of failure. SIL ratings are referred to as SIL 1, 2, 3, and 4. With a SIL rating, no single component is intrinsically “SIL rated”; instead, the system as a whole is given a SIL rating. SIL rated components help achieve SIL system rating with greater ease. To contextualize this, a designer may want to design a SIL 3 system. In order to achieve a SIL 3 system, the risk reduction factor needs to be 1 in 10,000. There are many ways to achieve this, but by using a SIL rated product the designer can achieve this faster and more efficiently. PL is the safety performance level rating of a control system. Like SIL, it indicates how much a system reduces risk but is more general. While SIL refers to machinery specific electrically controlled systems, PL refers to any control system. Also like SIL, PL is a system wide rating. Having a PL rated part does not rate the system for a certain PL level, but helps the designer achieve PL system wide rating. PL ratings are referred to as PL c, b, d, and e.
PTM Published on: 2018-10-15