IET
Decrease font size
Increase font size
Topic Title: SIL 2 PLC
Topic Summary:
Created On: 23 October 2011 05:39 PM
Status: Read Only
Linear : Threading : Single : Branch
Search Topic Search Topic
Topic Tools Topic Tools
View similar topics View similar topics
View topic in raw text format. Print this topic.
 23 October 2011 05:39 PM
User is offline View Users Profile Print this message


Avatar for MAXMIRA.
MAXMIRA

Posts: 78
Joined: 25 January 2011

Could anyone point me in the direction of a SIL2 rated PLC, would be handy if it could also handle analogue inputs.
 23 October 2011 07:51 PM
User is offline View Users Profile Print this message



oneye

Posts: 158
Joined: 25 February 2008

There is strictly speaking no such thing as a 'SIL2 PLC', rather there are PLC's on the market that can be used in SIL2 applications. You also have to justify the need for the rating, and someone in the scheme of things has to provide calculations

Makes of PLC - Allen Bradley (aka Rockwell), Siemens using failsafe I/O are the 2 favourites but also consider Triconix, Triplex, Emerson and the latest GE kit. That's not to state other makes cannot be used in rated applications.

PS. Forgot to mention - any PLC capable of being in a SIL rated system has analogue i/o capability.
 25 October 2011 03:07 PM
User is offline View Users Profile Print this message


Avatar for anthonybates1980                                  .
anthonybates1980

Posts: 20
Joined: 25 July 2008

As oneeye states a 'SIL 2 PLC' does not exist. When a manufaturer labels equipment for SIL applications they usually specify the equipment is suitable for SIL loops/systems. Again as Oneeye states most PLC manufaturers produce suitable hardware but you have to determine failure rate data and hence its reliability for the PLC and software to justify it as suitable for the SIL you require.

Kind regards

Tony
 15 November 2011 05:07 PM
User is offline View Users Profile Print this message



adems05

Posts: 1
Joined: 25 July 2008

Check out the PSS 3047-3 from PILZ which we use and is rated for SIL2 Applications.
 18 November 2011 01:22 PM
User is offline View Users Profile Print this message


Avatar for MAXMIRA.
MAXMIRA

Posts: 78
Joined: 25 January 2011

Thanks for clarifying
Statistics

See Also:



FuseTalk Standard Edition v3.2 - © 1999-2014 FuseTalk Inc. All rights reserved.