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safety integrity level

   Also found in: Acronyms, Wikipedia 0.06 sec.

safety integrity level

A measurement of the effectiveness of safety systems based on the probability of tolerable incidents that can occur within a number of processing demands. For example, SIL level 4 means that for every 10,000 demands on the system, there could be one incident. See safety instrumented system.

Probability Categories
SIL From To

1 1 in 10 1 in 100
2 1 in 100 1 in 1,000
3 1 in 1,000 1 in 10,000
4 1 in 10,000 1 in 100,000



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For Safety Integrity Level (SIL) 3 compliance within that single box, dual-processor operation is required.
The Platform for Industrial Safety is based on the INTEGRITY RTOS, which is in the final stages of certification by TUV to the International Electrotechnical Commission (IEC) standard 61508 at Safety Integrity Level 3 (SIL3).
In special-purpose vehicles, Safety Integrity Level (SIL) 4 in compliance with IEC 61508 can be attained while comparable safety standards are met in aerospace applications.
 
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