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937Z Zener Barriers

Our Bulletin 937Z Zener Barriers provide protection for electrical signals within hazardous areas. These barriers feature a narrow profile of just 12.5 mm to maximize control panel space. They also prevent the transfer of unacceptably high energy from the safe area into the hazardous area. Our Zener Barriers include positive polarity, which means the anodes of the Zener diodes are grounded. Depending on the application, increased or decreased intrinsic safety parameters apply for serial or parallel connection.

Popular Resources/Quicklinks
Bulletin 937 Intrinsic Safety Modules Product Profile Bulletin 937 Intrinsic Safety Modules Selection Guide and Technical Data Bulletin 937Z Zener Barriers Certification Information

Overview

  • Includes standard DIN rail snap on mounting for easy installation and grounding
  • Includes one- or two-channel barriers, 646 or 327 Ohm maximum resistance
  • Provides diode return feature to prevent a current into the hazardous area
  • Offers a high power version with a smaller serial resistance which provides higher voltage to the field device
  • Uses Zener diodes to limit electrical energy in hazardous environments

Learn the basics of intrinsic safety circuits and how our Bulletin 937 Intrinsic Safety Modules can provide a cost-effective solution for hazardous location challenges.


Product Selection


Certifications

You can see a list of certifications for the Bulletin 937Z Zener Barriers by product number and link to the pdf of the certification document.

Looking for Additional Information?

To find additional product information including CAD drawing files, 3D models and more use our Product Catalog.


Documentation

Resource Publication Number Language
Bulletin 937 Intrinsic Safety Modules Product Profile 937-PP001
Bulletin 937 Intrinsic Safety Modules Selection Guide and Technical Data 937-SG001
Bulletin 937Z Zener Barriers Certification Information 937Z-TD001
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Applications

Zener Barrier Intrinsic Safety Modules are used in any application with Class 1, Division 1 (Zones 0 and 1) hazardous locations such as:

  • Chemical
  • Petrochemical
  • Oil and Gas