Instrumented Security Systems

Definition, evaluation and audit of Safety Instrumented Functions

ISO Ingénierie offers study, consulting and audit services for the definition, design and validation of safety instrumented functions (SIF) [link to §1].

ISO Ingénierie is recognized as an expert in the application of the functional safety principles resulting from the IEC / NF EN 61508 standard in all industrial fields, in particular the process industry (CEI / NF EN 61511) – Product sheet

ISO Ingénierie supports SIS manufacturers and integrators throughout the life cycle of safety instrumented functions and systems to meet the challenges related to safety of people, the environment and property.

Hazard and risk analysis:

• Preliminary risk analyses (PRA)
• Process risk analysis HAZOP, HAZID, FMECA

Definition of the safety instrumented functions and required SIL levels [link to §3] :

• Barrier / protective layer analysis (LOPA)

• Calibrated risk graphs

• Safety barrier matrix

Assistance in the design of instrumented safety systems:

• Definition of I&C architectures

• Comparison / selection of safety PLCs

• Validation of device selection: sensors, actuators, digital or analog

• Pre-validation of SIL levels reached

Evaluation of the SIL levels reached [link to §4] by the safety instrumented functions:

• Organization, document management, processes, procedures, software development

• Architecture and fault tolerance

• Reliability and availability calculations (PFD, PFH & SFF)

• Improvement simulation

Assistance with the qualification-validation strategy, validation of installation, operation, periodic testing and maintenance procedures [link to §5]

ISO Ingénierie supports device manufacturers in the design, validation and SIL certification of their products in accordance with IEC 61508. – Product sheet

ISO Ingénierie is a recognized training organization on functional safety standards IEC 61508, 61511, 13849, 62061 (…), and is a member of the Quali-SIL steering committee as an expert and trainer on the QualiSIL qualification standard. – [link to SIF and QualiSIL training]

Detailed description page of the application process of IEC 61508/61511 standards :
§1 : Risk reduction levels [link to §1]
§2 : Purpose of the Safety Instrumented Functions (SIF or FIS) [link to §2]
§3 : Definition of a required SIL level [link to §3]
§4 : Evaluate the actual SIL level [link to §4]
§5 : Improving the life cycle / operation and maintenance provisions [link to §5]