Our 937T Isolator Barriers include galvanic optical or transformer isolation, these modules provide an interface within the intrinsic safety circuit that is electrically separated from the control system. A key advantage of isolated barriers is that they do not require a ground between the module and the intrinsically safe device. Available in 12.5 mm (0.5 in) and 20mm (0.8 in) widths.
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.
You can see a list of certifications for the Bulletin 937T Isolator Barriers by product number and link to the pdf of the certification document.
To find additional product information (CAD drawing files, 3D models, etc.) enter the complete catalog number (including dashes) below.
Certifications apply when product is marked. See our Product Certification site for Declarations of Conformity, certificates and other certification details.
Zener Barrier Intrinsic Safety Modules are used in any application with Class 1, Division 1 (Zones 0 and 1) hazardous locations such as:
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