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PLC SIL Definition

PLC SIL Definition

PLC SIL Definition

(OP)
AB ControlLogix 1756 is rated for SIL 2, does it mean I will get SIL 2 in any kind of configuation, or I have to be careful select components of controlLogix to make it SIL 2, such as redundant CPU, redundant network? To what level of redundancy I need to make it SIL 2?

Thanks in advance.

RE: PLC SIL Definition

I'm unable to help you, but what is a SIL rating?

RE: PLC SIL Definition

(OP)
SIL - Safety Integrity Level

RE: PLC SIL Definition

automation99:

In order to configure a programmable controller to meet a certain SIL, the manufacturer will have a safety manual.  This manual will outline what is required to be completed in order to attain the SIL rating as tested.

A quick answer to your question is: no, only in specific configurations will you attain SIL2.

Also, be careful of processor to processor communications.  If you are passing shutdown information over a communication network, that network shall be designed to the highest SIL required.

Hope this helps.

sdl

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