Kenexis - Functional Safety Podcast

Kenexis
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Welcome to the Kenexis Functional Safety Podcast! I'm Ed Marszal, President and CEO of Kenexis, a leading technical safety consultancy for the chemical process industry. With decades of experience in safety instrumented systems, I bring a unique perspective to this podcast, having actively contributed to the ISA 84 committee since 1994. In this inaugural season, we'll delve into the IEC 61511 standard, examining each word's significance. I'll provide detailed insights into the standard's interpretation and application, complemented by personal stories from my career and committee discussions.

  1. JAN 20

    S1E45 11.8.4 to 11.8.6

    A device should never remain in bypass indefinitely. Bypassduration must be time-limited, and appropriate compensating measures must be implemented.   Listen in for more information and thoughts on this importanttopic.

    37 min

  2. JAN 13

    S1E44 11.8.1 to 11.8.3

    The design shall allow for testing of the SIS either end to end OR in segments meaning you could test one piece at a time, but when you do that, you have to be very careful… Tune in as this topic is explored in greater detail, covering Sections 11.8.1 to 11.8.3 in this episode.

    1h 1m

  3. JAN 5

    S1E43 11.7.3

    Many users of generic, off-the-shelf PLC logic solvers for Safety Instrumented Systems are surprised to learn that maintenance and engineering interfaces are not permitted to be connected while the process is in operation. Join us as section 11.7.3 is discussed in more detail.

    52 min

  4. 12/02/2025

    S1E42 11.7.2

    Bypasses and resets are two standard data elements routinelytransmitted from the BCPS to the SIS, and this communication must be done safely… Listen in for more information on this section.

    56 min

  5. 11/24/2025

    S1E41 11.7.1 and 11.7.4

    You can transfer data to and from the Safety Integrated System (SIS), but your design must prevent an outside failure from causing an internal SIS failure.In this episode, we dive into the crucial world of secure data transfer for SIS.

    50 min

  6. 11/17/2025

    S1E40 11.6

    Don't let the certificate distract you. Your role as an instrumentation and control engineer requires continued diligence. The work still needs to be done!

    36 min

  7. 11/13/2025

    S1E39 11.5.4 through 11.5.6

    Did you know that you can install Programmable Logic Controllers (PLCs) based on prior use without being certified? Sounds easy, right? Think again! While they are exempt from formal certification, we reveal why achieving full compliance with installation and safety requirements is often an extremely difficult, if not impossible, hurdle for engineers. Tune in to learn why relying on prior use might be a compliance nightmare!

    1h 10m

  8. 10/06/2025

    S1E38 11.5.1 through 11.5.3

    The devices you use in your safety instrumented systems DO NOT have to be certified! We're cutting through the noise to give you the facts on what truly matters for functional safety. In this episode we discuss the actual requirements—the principles, standards, and engineering practices—that dictate a device's suitability.

    1h 2m
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About

Welcome to the Kenexis Functional Safety Podcast! I'm Ed Marszal, President and CEO of Kenexis, a leading technical safety consultancy for the chemical process industry. With decades of experience in safety instrumented systems, I bring a unique perspective to this podcast, having actively contributed to the ISA 84 committee since 1994. In this inaugural season, we'll delve into the IEC 61511 standard, examining each word's significance. I'll provide detailed insights into the standard's interpretation and application, complemented by personal stories from my career and committee discussions.

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