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SILZone™ – The Safe Systems Approach

SILZone over a globe with the Willowglen and SentientQ logos

SILZone™ – The Safe Systems Approach

SILZone is a simple, cost effective and time efficient Willowglen solution to address SIL related system complexity, client requests and new regulations requiring SIL systems for specific types of applications. SILZone™ can be easily incorporated into SentientQ.™

SentientQ is SCADA Reimagined.

Video Transcript

Hello. My name is Ian Verhappen. I am one of the Solutions Architects at Willowglen Systems developing SentientQ’s SILZone safety architecture. Over my career I have supported safety systems in processing facilities, qualified as a Functional Safety Engineer and continue to participate in the development of ISA-84 safety standards working groups.

What is SIL?

SIL is an acronym that stands for Safety Integrity Level.

SIL is a measure of safety system performance, in terms of probability of failure on demand (PFD).

The PFD convention was chosen based on the numbers: it is easier to express the probability of failure rather than that of proper performance (for example: 1 in 1,000 vs. 999 in 1,000).

SIL describes the ability to reduce risk.

There are four discrete integrity levels associated with SIL: SIL 1, through SIL 4.

The higher the SIL level, the higher the associated safety level, higher the reliability, and lower the risk and lower the probability of a system failure on demand.

As the SIL level increases, the installation, maintenance costs and the complexity of the system also typically increases.

Why SILZone™?

To address this problem and to easily integrate safety systems into geographically distributed SCADA environments, Willowglen developed SILZone™.

What is SILZone?

SILZone is a simple, cost effective and time efficient Willowglen solution
to address SIL related system complexity, client requests and new regulations requiring SIL systems for specific types of applications.

How does SILZone™ work?

SILZone™ works like a VPN for safety systems by providing a secure connection between end devices without being concerned about what is in the middle.

As a result, SILZone™ isolates the implementation of safety critical logic and its specific requirements from the balance of the SCADA system.

This makes SIL certifications easier; without siloing operator interface, enhancing ease-of-use at every touchpoint without compromising system safety and reliability while also controlling costs.

SILZone™ can be easily incorporated into SentientQ™ or SCADACOM™ to meet the reliability requirements of a SIL system in an integrated SCADA environment.

To learn more, check out our website.

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