7/6/2009 8:44 AM | |
Joined: 4/17/2009 Last visit: 8/9/2024 Posts: 303 Rating:
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Hello Lalit, in the attachment youwill find thenessassary information to getthe SIL CL 1, 2 or 3
It's dependent on the HFT (hardware fault tolerenz), the DC (diagnostic coverage) andthe SFF(safe failure fraction) Electro mechanical components eg.position switches, or contactorshave a HFT 0. If you use two componentsthenyou have a HFT 1. Toaccording SIL 2 or 3 in combination with electro mechanically componentsyou should use two components. Electronic components have normally a fix SIL CL valua. You get thisvalue from the manufacturer. her area link to all Siemens SIMATIC failsafe components: http://support.automation.siemens.com/WW/view/de/27832836 All Siemens F-PLC's havea SIL CLAIM limit from 3 (SIL CL). This means that you can use a SIL 3 SIMATIC F-PLC in application for SIL 1, 2 or 3 A Hardware with SIL 1 can you only use in SIL 1 application. But you can achieve the SIL CL. Limit for example use two componets (redundancy) or a higher SFF This is easy for elektro mechanically components but not for electronic. I hope we could help you best regards our SET-TEAM |
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7/9/2013 3:15 PM | |
Joined: 4/24/2009 Last visit: 8/20/2024 Posts: 2682 Rating:
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Follow-up-question splitted to Is there any guide which components do we need to make SIL1,2 or 3?. Best regards O_Moderator |
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