Pepperl+Fuchs Blog

Intrinsic Safety: Isolated Barriers Bring out the Best in Protection

Posted by Patricia Stafford on Tue, Dec 22, 2015

What is intrinsic safety?

The best form of protection is prevention. So when it comes to electricity, low voltage and current flow is the way to go.

Keeping people and equipment safe is a top priority for anyone who works with electrical equipment in a hazardous area. Intrinsic safety is key. An intrinsically safe system is one in which the current and voltage are kept so low that there is not enough energy to produce arcs, sparks, flames, or explosions.

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Topics: Intrinsic Safety Barriers, Intrinsic Safety

Because Sometimes You Need More Than an Intrinsic Safety Barrier

Posted by David Hohenstein on Thu, Sep 03, 2015

There are times when you need only an intrinsic safety barrier or surge protection to get the job done. But what if you need more than just a component, something more customized, something like a complete system solution—including documentation and certification? Sure, you could always build your own and have it certified yourself. But it's time consuming, and the number of approval standards and certification bodies is enormous. You really need to be focusing on keeping your plant running.

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Topics: Approvals/ Certifications, Hazardous Area Enclosures/ Equipment, Intrinsic Safety Barriers

How to Connect a NAMUR Sensor to a Switch Amplifier

Posted by Robert Schosker on Thu, Feb 26, 2015

NAMUR sensors are used in hazardous locations, and can provide both explosion hazard and personal safety protection. NAMUR sensors and switch isolators are highly reliable and have proven-in-use characteristics, making them a perfect choice for safety-related applications when connected to suitable control circuits.

Most devices are independently rated with Probability of Failure on Demand (PFD) and Safe Failure Fractions (SFF) that enable them to be used in functional safety areas up to SIL2 or SIL3.. In this video, Product Manager Robert Schosker will show you how to connect a NAMUR sensor to switch amplifier KFA5-SR2-Ex2.W, and then test to ensure proper operation.

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Topics: Inductive Sensors, Troubleshooting, Intrinsic Safety Barriers

Can I Use an Intrinsic Safety Barrier As a Signal Conditioner in a Non-IS Application?

Posted by Aaron Severa on Thu, Feb 13, 2014

The answer is most certainly, “Yes!” But there are a few conditions that go along with using an IS barrier as a signal conditioner in a non-IS application.

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Topics: Intrinsic Safety Barriers, Ask an Expert, Signal Conditioners

Are IS Barriers Required for Instrumentation Rated Class I, Div. 2?

Posted by Robert Schosker on Fri, Jan 24, 2014

A few weeks back, an interesting question came in from a customer regarding an article that I wrote about intrinsic safety. Here's a link to the article,  "Intrinsic Safety 101 - Hazardous Locations."

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Topics: Intrinsic Safety, Intrinsic Safety Barriers, Ask an Expert

6 Signal Conditioners You Should Know About

Posted by Barbara Vazquez-Isla on Thu, Dec 12, 2013

A signal conditioner is a device that changes or boosts the signal between the controller and the field device to make sure the communication works properly. A common application for signal conditioners is when you have a mV input from a thermocouple going into a
4 mA … 20 mA input card. A signal conditioner converts the mV signal into a 4 mA … 20 mA signal. In this blog, we will discuss 6 signal conditioners that all engineers should be aware of.

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Topics: Intrinsic Safety Barriers, Signal Conditioners

Ask an Expert! Intrinsic Safety Questions - Episode 1

Posted by Andy LaMar on Fri, Oct 25, 2013

Zener Barriers with blown fuses, blinking error lights, and IS barriers in a Class I, Div. 2 area...

Are you ready to learn more about intrinsic safety? This is our second installment of Ask an Expert, where we sit down with a product expert and answer questions from customers like you.

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Topics: Intrinsic Safety, Intrinsic Safety Barriers, Ask an Expert, Zener Barriers

Do I need an intrinsically safe (IS) barrier for my sensor?

Posted by Tracy Molnar on Thu, Aug 29, 2013

To answer the question of whether you need to use an isolated barrier device with your sensor, it’s helpful to first answer the following two questions:

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Topics: Intrinsic Safety, Intrinsic Safety Barriers, Inductive Sensors, Capacitive Sensors

4 Fun Facts about Intrinsic Safety (IS)

Posted by Robert Schosker on Fri, May 10, 2013

During the years I have worked at Pepperl+Fuchs, I have been asked a lot of questions regarding the implementation of intrinsic safety, or IS for short. As they say, “Knowing is half the battle,” so I decided to share a few of those questions and answers. 

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Topics: Intrinsic Safety, Intrinsic Safety Barriers

IS Barriers - Keepin' it Safe in Hazardous Areas

Posted by David Hohenstein on Fri, Oct 19, 2012

An IS barrier (also called an intrinsic safety barrier) is, quite simply, an electronic safety device that is used to protect a circuit or instrument located in a hazardous location from becoming an ignition source.

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Topics: Intrinsic Safety, Intrinsic Safety Barriers

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