Ok - as much as I hate to admit it, I've been selling zener barriers while having absolutely NO knowledge of what they were or what they did! They only thing I could tell you about them is that they were these small green parts from Pepperl + Fuchs and that they were important for some reason! Well, in my quest to not only win the "Blog War" between Joe and I but to further my technical knowledge, I decided to do a little research. Here is what P+F has to say about Zener Barriers:
Zener barriers provide cost saving Ex-protection for various applications in process automation systems. The amount of energy transferred to the hazardous location is limited to a safe level incapable of igniting the explosive atmosphere. Pepperl+Fuchs offers a wide product portfolio of housing and connection styles, which include DIN rail, termination board mounted, and accessories for each application. During maintenance activities the SB zener barriers can be replaced without disturbing the cabling. By pulling out the individual barriers the respective instrumentation circuits are safely disconnected.
Now that makes much more sense to me. You can save money and make your application safer all at the same time! Count on Pepperl + Fuchs and Marshall Wolf Automation to save you money, make things easier and keep you safe! Call us today at 800-325-9653 (WOLF). We're always happy to assist you and we have technical help on staff to assist with your application questions as well! (They know a lot more than I do - and don't usually have to look it up!)