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Functional Safety for Process Automation Applications

Widest Safety Portfolio on the Market

Widest Safety Portfolio on the Market

With more than 750 SIL/PL assessed devices from a single source, Pepperl+Fuchs offers you an abundance of options—ensuring that you always get the best solution for your individual application.
Knowledge Is the Key

Knowledge Is the Key

For decades, Pepperl+Fuchs has been a driving force in process automation. Our in-depth understanding of functional safety norms and regulations is the basis for trusted safety components.
Limitless Safety

Limitless Safety

As the only company worldwide we provide you with a complete SIL 3 portfolio for all signal types—analog and digital. Benefit from interface modules for all your applications out of one hand.
Learn from the Experts

Learn from the Experts

Pepperl+Fuchs supports with certified safety specialist departments and offers a wide range of training programs for automation professionals.

Safety Products

NEW! The Only SIL 3 Portfolio Worldwide for All Signal Types

With the new SIL 3 output drivers, Pepperl+Fuchs has closed the last gap in its portfolio of SIL-3-certified isolated barriers. Intrinsically safe SIL 3 components are now available for all signal types—digital and analog, for control signals to the actuators and for measurement signals from the field, as devices for DIN rail mounting and as isolating components for termination boards.

For practical applications, this means that the previously necessary workaround with redundant SIL 2 components is no longer necessary for SIL 3 applications: positioners, electric valves or HART IP converters in intrinsically safe SIL 3 applications can now be connected directly to the control system with a single safety barrier.

Application Examples

Emergency Shutdown with HART Positioners

Emergency Shutdown with HART Positioners

Pepperl+Fuchs meets the boundary conditions of functional safety according to SIL 3 without the use of special emergency shutdown valves and safety shut-off valves. Instead, the existing analog positioners are used in a discrete mode to a certain extent. They are either fully open or closed.

The functional inspection according to SIL 3 is achieved by actuating these controllers with HART signals for partial stroke tests in addition to their actual function. These tests allow for functional inspection testing without shutting down the entire media supply and without redundant hardware. The KCD2-SCD-Ex1.ES SMART current driver, for example, is suitable for this function up to safety level SIL 3.

Transmitter Power Supplies Enable Oil Pressure Monitoring

Transmitter Power Supplies Enable Oil Pressure Monitoring

Plain bearings provide reliable lubrication in high-speed machines. They ensure minimal friction losses and play a crucial role in increasing service life. For example, this is how turbines and generators become fully lubricated, which ensures that the friction between metal surfaces is transferred into the liquid lubricant, thereby avoiding any abrasion. To achieve this effect, the lubricating film needs to be pressurized, because this is the only way to reliably separate the contact surfaces from each other. In the case of hydrostatic plain bearings, an oil pump is used to ensure consistent oil pressure and reliable lubrication. 

pressure transmitter with a measurement output of 4 … 20 mA is ideally suited for constantly monitoring the oil pressure in the lubrication cycle. A transmitter power supply unit provides an intrinsically safe power supply and ensures that the data is reliably transmitted. KCD2-STC-Ex1.ES modules are typically used for this application. They are suitable for applications up to SIL 3 in accordance with IEC/EN 61508.

Dual Redundant Safety Relays for Maximum Functional Safety

Dual Redundant Safety Relays for Maximum Functional Safety

A prerequisite for reliable alarm signaling in the event of a fire outbreak is safe signal transmission supplemented by galvanic isolation between the control and field circuits. The ETS safety relays (energized-to-safe) from Pepperl+Fuchs are designed precisely for this purpose.

The KFD2-RSH-1.2E.L safety relay is an example from this series. It meets the requirements for integrated safety according to SIL 3 and is used for the safe energizing of devices. Periodic diagnostic and proof tests are carried out to check the proper functioning of connected devices to ensure that both a fire alarm and automatic firefighting measures are reliably triggered in the event of a fire.

Safe Shutdown of the Fuel Supply of Large Diesel Engines

Safe Shutdown of the Fuel Supply of Large Diesel Engines

Large diesel engines with several thousand horsepower are typically used in diesel locomotives. Engines of this caliber are also often used as an emergency power unit for uninterruptible power supplies. The air-fuel mixture ignites completely within the engine and therefore poses almost no risk to the engine itself or to people working near the engine. Danger can only arise if one of the fuel lines is faulty and fuel leaks.

The key requirement for alarm systems and automatic extinguishing devices being reliably activated is fault-free signal transmission between the field circuit and the control side, which are galvanically isolated from each other. KFD2-RSH-1.*D.* safety relays are ideal for such applications. These safety relays comply with the requirements up to SIL 3 according to IEC/EN 61508 and up to PL e according to EN/ISO 13849—a multi-stage redundancy concept for ensuring that malfunctions are virtually impossible.

Literature and Tools

Download the Functional Safety Compendium!

Download the Functional Safety Compendium Now!

In our downloadable compendium on functional safety, we clarify the concepts and definitions that are necessary to reduce risks to a tolerable level. The compendium explains the specific standards and definitions of hazards and methods of risk analysis.

Learn how you can successfully implement safety equipment and follow us through a hands-on case study using a simplified example for an overfill prevention system. The compendium is rounded out by a glossary and list of abbreviations that helps you to quickly reference safety terminology whenever you need it.

Events and Trainings

Pepperl+Fuchs offers a wide range of training programs for automation professionals. These programs are geared toward management, engineering, production, and safety personnel involved in equipment design and use where potentially explosive atmospheres are present.

Events and Training on Functional Safety

Get to Know the Experts

Functional Safety Experts Interview

Extensive in-house expertise has been vital to Pepperl+Fuchs' leadership in functional safety components. In this interview from our digital magazine "amplify," Head of Functional Safety Michael Kindermann, Functional Safety Manager Hasan Sülük, and Manager of Training and Committee Work Dr. Andreas Hildebrandt discuss their day-to-day work, the current standards with which their products must comply, and methods for transferring knowledge.

Read the interview

The SIL Clinic—A Special Event on Functional Safety

With its annual SIL clinic, Pepperl+Fuchs hosts an event that is appreciated by speakers and participants alike. Get an impression of the tenth edition and what makes the SIL clinic so special.

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