Sign In Help
Schneider Electric
HelpSign In
Schneider Electric Exchange
  • Home
  • Collaborate
  • Develop
  • Shop
Home Collaborate Develop Shop Log in or Register Help

Invite a Co-worker

Send a co-worker an invite to the Exchange portal.Just enter their email address and we’ll connect them to register. After joining, they will belong to the same company.
You have entered an invalid email address. Please re-enter the email address.
This co-worker has already been invited to the Exchange portal. Please invite another co-worker.
Please enter email address
Send Invite Cancel

Invitation Sent

Your invitation was sent.Thanks for sharing Exchange with your co-worker.
Send New Invite Close
  • Home
  • Collaborate
  • Exchange Community
  • :
  • Industrial Automation
  • :
  • Industry Automation and Control Forum
  • :
  • Why is SIL3 important and how much does it cost for your organization?
Community Menu
  • Forums
    • By Topic
        • EcoStruxure IT
          • EcoStruxure IT forum
        • Industrial Automation
          • Industry Automation and Control Forum
          • Alliance System Integrators Forum
          • Machine Solutions in the Digital Transformation
          • EcoStruxure Automation Expert / IEC 61499 Forum
          • Industrial Edge Computing Forum
          • Level and Pressure Instrumentation Forum
          • Modicon User Group
          • PLC Club Indonesia
          • SEE Automation Club Forum
          • Fabrika ve Makina Otomasyonu Çözümleri
          • Форум по промышленной автоматизации СНГ
        • SCADA & Telemetry Solutions
          • Geo SCADA Expert Forum
          • SCADA and Telemetry Devices Forum
        • Power Distribution IEC
          • Power Distribution and Digital
          • Power Standards & Regulations
          • Paneelbouw & Energie Distributie
        • Power Distribution Softwares
          • EcoStruxure Power Design Forum
          • SEE Electrical Building+ Forum
          • LayoutFAST User Group Forum
        • Solutions for your Business
          • Solutions for Food & Beverage Forum
          • Solutions for Healthcare Forum
    • By Segment
        • Food & Beverage
          • Solutions for Food & Beverage Forum
        • Healthcare
          • Solutions for Healthcare Forum
      • EcoStruxure IT
        • EcoStruxure IT forum
      • Industrial Automation
        • Industry Automation and Control Forum
        • Alliance System Integrators Forum
        • Machine Solutions in the Digital Transformation
        • EcoStruxure Automation Expert / IEC 61499 Forum
        • Industrial Edge Computing Forum
        • Level and Pressure Instrumentation Forum
        • Modicon User Group
        • PLC Club Indonesia
        • SEE Automation Club Forum
        • Fabrika ve Makina Otomasyonu Çözümleri
        • Форум по промышленной автоматизации СНГ
      • SCADA & Telemetry Solutions
        • Geo SCADA Expert Forum
        • SCADA and Telemetry Devices Forum
      • Power Distribution IEC
        • Power Distribution and Digital
        • Power Standards & Regulations
        • Paneelbouw & Energie Distributie
      • Power Distribution Softwares
        • EcoStruxure Power Design Forum
        • SEE Electrical Building+ Forum
        • LayoutFAST User Group Forum
      • Solutions for your Business
        • Solutions for Food & Beverage Forum
        • Solutions for Healthcare Forum
      • Food & Beverage
        • Solutions for Food & Beverage Forum
      • Healthcare
        • Solutions for Healthcare Forum
  • Blogs
    • By Topic
        • Industrial Automation
          • Industrial Edge Computing Blog
          • Industry 4.0 Blog
          • Industrie du Futur France
        • SCADA & Telemetry Solutions
          • SCADA and Telemetry Blog
        • Power Distribution IEC
          • Power Events & Webinars
          • Power Foundations Blog
        • Power Distribution NEMA
          • NEMA Power Foundations Blog
        • Power Distribution Softwares
          • EcoStruxure Power Design Blog
          • SEE Electrical Building+ Blog
        • Solutions for your Business
          • Solutions for Food & Beverage Blog
          • Solutions for Healthcare Blog
          • Solutions for Retail Blog
        • Community experts & publishers
          • Publishers Community
    • By Segment
        • Food & Beverage
          • Solutions for Food & Beverage Blog
        • Healthcare
          • Solutions for Healthcare Blog
        • Retail
          • Solutions for Retail Blog
      • Industrial Automation
        • Industrial Edge Computing Blog
        • Industry 4.0 Blog
        • Industrie du Futur France
      • SCADA & Telemetry Solutions
        • SCADA and Telemetry Blog
      • Power Distribution IEC
        • Power Events & Webinars
        • Power Foundations Blog
      • Power Distribution NEMA
        • NEMA Power Foundations Blog
      • Power Distribution Softwares
        • EcoStruxure Power Design Blog
        • SEE Electrical Building+ Blog
      • Solutions for your Business
        • Solutions for Food & Beverage Blog
        • Solutions for Healthcare Blog
        • Solutions for Retail Blog
      • Community experts & publishers
        • Publishers Community
      • Food & Beverage
        • Solutions for Food & Beverage Blog
      • Healthcare
        • Solutions for Healthcare Blog
      • Retail
        • Solutions for Retail Blog
  • Ideas
        • Industrial Automation
          • Modicon Ideas & new features
        • SCADA & Telemetry Solutions
          • Geo SCADA Expert Ideas
          • SCADA and Telemetry Devices Ideas
  • Knowledge Center
    • Building Automation Knowledge Base
    • Industrial Automation How-to videos
    • Ask Exchange
    • Digital E-books
    • Success Stories Corner
    • Power Talks
  • Events & Webinars
  • Support
    • User Guide
    • Leaderboard
    • Releases Notes
How can we help?
cancel
Turn on suggestions
Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.
Showing results for 
Show  only  | Search instead for 
Did you mean: 
49516members
Join Now
242865posts
Join Now

Why is SIL3 important and how much does it cost for your organization?

Options
  • Subscribe to RSS Feed
  • Mark Topic as New
  • Mark Topic as Read
  • Float this Topic for Current User
  • Bookmark
  • Subscribe
  • Mute
  • Printer Friendly Page
Back to Industry Automation and Control Forum
GMInternational
Lieutenant JG GMInternational
Lieutenant JG
‎2020-04-23 04:47 AM
0 Likes
1
366
  • Mark as New
  • Bookmark
  • Subscribe
  • Mute
  • Subscribe to RSS Feed
  • Permalink
  • Print
  • Email to a Friend
  • Report Inappropriate Content
‎2020-04-23 04:47 AM

Why is SIL3 important and how much does it cost for your organization?

Originally published on GMI blog by GM International| July 24, 2018

Why is SIL 3 important and how much does it cost for your organization.png

 

SIL 3 is a topic that routinely comes up in discussions related to the development of safety-critical systems. Do I need SIL 3 capabilities? How do I know? What will it cost?

These are questions that everyone involved in safety-critical applications is confronted with and correct answers are critical to maximizing the efficiency and reliability of a process plant.

Let’s take a look at the most important aspects of SIL 3 and find out exactly what they mean for your organization.

WHAT IS SIL 3?

Safety Integrity Levels (SILs) are a measure of the impact that a Safety Instrumented Function (SIF) has over the risk associated with a specific hazard. The higher the SIL level is, the more efficient that function will be at reducing the risk it mitigates.

SIL 3 is one of the safety integrity levels defined by the IEC 61508 standard. It is defined by a risk reduction factor of 1.000 – 10.000 of failure on demand and 10-8 – 10-7 for probability of failure per hour. It is a quantitative assessment of the acceptable failure level for a security function and it is therefore representative for its safety and reliability.

IEC 61508 defines 4 safety integrity levels, labeled from SIL 1 to SIL 4. SIL 3 is the highest safety integrity level that is economically feasible for most industrial operations.

WHY IS SIL 3 IMPORTANT?

The safety integrity level (SIL) of a Safety Instrumented Function (SIF) in a Safety Instrumented System (SIS) is not chosen at random, or on a best-effort basis. Instead, the appropriate SIL level is determined, based on a number of methods such as Safety Layer Matrix (SLM), Layer of Protection Analysis (LOPA) or Fault Tree Analysis (FTA).

These methods take into account the types of accident that can occur within your organization, their probability, the way they are related and their consequences in terms of cost. The SIL level that they recommend is therefore the level appropriate for the risks that your organization faces.

In other words, any given safety integrity level (including SIL 3) is not just a metric that you should aspire to, but a direct reflection of the risk that your organization faces. Within the framework of IEC 61508, risk is defined in terms of cost per time unit.

If SIL 3 is determined as the appropriate SIL, it means that SIL 3 is the minimum integrity level that can reduce the risk (that is, the cost per unit of time) associated with a particular hazard to an acceptable level.

WHAT DOES SIL 3 MEAN IN TERMS OF DEVICE CHOICE?

SIL 3 is not the rating of a device, but of the function that a device (or a set of devices) performs. That being said, only certain devices can be used to implement a given safety integrity level. For SIL 3 functions, only devices that are rated for SIL 3 operation can be used or redundance devices with lower SIL.

IS SIL 3 EXPENSIVE?

Evaluating the cost of a safety function is a difficult task, because what you need to consider is not just the upfront cost of implementing it, but also the cost associated with the risk that it mitigates. However, the former is an immediate cost, whereas the latter is essentially a potential cost.

SIL 3 is more expensive than either SIL 1 or SIL 2. Implementing and maintaining it incurs additional operating costs, requires a specific set of knowledge, skills and processes to be developed within the operating team and devices rated for SIL 3 use can be more expensive. 

Consequently, SIL 3 is only recommended under critical and specific circumstances. However, the cost of not implementing the appropriate SIL significantly outweighs the cost of implementing it.

CONCLUSIONS

SIL 3 is a high safety integrity level that is recommended only under special circumstances. However, where it is deemed appropriate, SIL 3 is critical to ensuring the adequate safety of an operation.

Tags (6)
  • Tags:
  • functional safety
  • Safety Instrumented Function
  • safety integrity levels
  • safety-critical systems
  • SIL2
  • Sil3
Share
Reply
  • All forum topics
  • Previous Topic
  • Next Topic
1 Reply 1
Rodrigo_Garcia
Administrator Rodrigo_Garcia Administrator
Administrator
‎2020-09-24 03:10 AM
0 Likes
0
187
  • Mark as New
  • Bookmark
  • Subscribe
  • Mute
  • Subscribe to RSS Feed
  • Permalink
  • Print
  • Email to a Friend
  • Report Inappropriate Content
‎2020-09-24 03:10 AM

Re: Why is SIL3 important and how much does it cost for your organization?

Thanks!

Rodrigo G. 


Industrial Automation Community manager

Tags (1)
  • Tags:
  • english
Share
Reply
Top Experts
User Count
andrea_romacco
Crewman andrea_romacco
1
Michael_Chan
Lieutenant Michael_Chan Lieutenant
1
Fleo
Crewman Fleo
1
JerryBartlemay
Ensign JerryBartlemay Ensign
1
sesa25402
Administrator sesa25402 Administrator
1
See More Top Experts
Find a Service Provider
Find a certified partner to help you address your integration, installation, maintenance and project needs.
View all Providers
Support

Have a question? Please contact us with details, and we will respond.

Contact Us
FAQ

Look through existing questions to find popular answers.

Learn More
About

Want to know more about Exchange and its possibilities?

Learn More

Full access is just steps away!

Join Exchange for FREE and get unlimited access to our global community of experts.

Connect with Peers & Experts

Discuss challenges in energy and automation with 30,000+ experts and peers.

Get Support in Our Knowledge Base

Find answers in 10,000+ support articles to help solve your product and business challenges.

Ask Questions. Give Solutions

Find peer based solutions to your questions. Provide answers for fellow community members!

Register today for FREE

Register Now

Already have an account?Log in

About Us FAQ Terms & Conditions Privacy Notice Change your cookie settings
©2020, Schneider Electric