exida Case Studies

Case Study

Certifying Moore Industries’ STA Logic Solver to SIL 3

How exida helped Moore Industries achieve SIL certification for their Safety Trip Alarm (STA) logic solver through extensive training and upgrading of existing processes.


Moore Industries-International, Inc.


IEC 61508 Logic Solver Certification


Engineering process overview audit, design architecture review, Safety Case compiled


SIL 3 Certification

Moore Industries

Moore Industries, a world leader in the design and manufacture of interface instruments for industrial process control, system integration, and factory automation, went with exida for the safety certification of their Safety Trip Alarm (STA).

With safety being a priority, Tina Lockhart, director of engineering at Moore, says “exida certification is the best choice for global functional safety certification.” exida,  an International Certification Body, certified Moore’s Safety Trip Alarm system to a SIL level 3 per IEC 61508.   

SIL certification through exida guarantees that a product has been designed and developed in accordance with the standard set by the International Electrotechnical Commission (IEC). A level 3 certification ensures a high level of resistance to random hardware and “systematic” design failures which is necessary for products such as the STA, which has the capacity to perform as a logic solver, acting upon potentially hazardous process conditions. 

“We were using TUV, a certification body based in Germany and tried exida to see if we could get better responsiveness. We soon discovered their focus on critical functional safety issues,” says Lockhart. exida’s team worked alongside of Moore Industries for a comprehensive assessment and smooth certification process. After working with Moore Industries, Iwan van Beurden, Certifying Assessor for exida stated, “After review of their products' hardware and systematic objective, Moore Industries has a strong development process that meets the requirements of SIL 3 - IEC 61508.” 

This level of safety certification allows Moore Industries to expand their product’s capability for reduced field failure rates and design flaws. "This product fits a niche market needing a single loop safety rated logic solver,” adds exida Managing Director Dr. William Goble. “We are pleased that Moore Industries chose exida.

Along with assistance in certification Lockhart added that exida’s team and “their understanding of the safety lifecycle has been invaluable” which is one of many reasons why exida  is the world’s leading product certification and knowledge company specializing in automation system safety, alarm management, cybersecurity, and availability.