Beijing Pinghe outlines how ATEX, IECEx and SIL3 differ for industrial signal interfaces

Beijing Pinghe says buyers in high-risk industries need to separate explosion-proof certification from functional safety certification when selecting signal interface equipment. The company says its barrier and isolator lines carry both certification families, which it argues can simplify procurement for hazardous-area and safety-instrumented applications.

Why it matters: - ATEX, IECEx and SIL3 answer different engineering questions, and mixing them up can lead to the wrong equipment being specified for hazardous-area or safety-system applications. - Buyers in nuclear power, aerospace and petrochemical projects need certification documents that match both ignition-risk requirements and safety-function requirements. - Dual-certified equipment can reduce qualification work when a project spans hazardous-area protection and functional safety.

What happened: - Beijing Pinghe published a buyer guide on explosion-proof certification and functional safety certification for industrial signal interface equipment. - The company framed the issue around three evaluation dimensions: certification purpose, scope and measurement, and product coverage and value. - Beijing Pinghe said its intrinsically safe barrier modules and signal isolators carry both certification families. - The company said the relevant certification coverage is available for project review through its website: More information.

The details: - ATEX is the European directive for equipment used in potentially explosive atmospheres. - IECEx is the international certification scheme for explosion protection standards across countries. - Both schemes cover the intrinsic safety concept, which limits voltage, current and stored energy so equipment cannot ignite surrounding gas or vapor under normal operation or fault conditions. - Explosion-proof certification maps to hazardous zones such as Zone 0, Zone 1 and Zone 2. - Zone 0 allows continuous presence of an explosive atmosphere. - Zone 1 allows occasional presence of an explosive atmosphere. - Zone 2 allows rare presence of an explosive atmosphere. - SIL3 measures the probability of failure on demand for a safety function. - Beijing Pinghe said TÜV Rheinland certified SIL3 for its product line. - The SIL3 rating also reflects safe failure fraction and diagnostic coverage of internal circuitry. - A SIL3-certified signal isolator or safety barrier is suitable for safety instrumented functions where a failure must be detectable rather than silent. - Beijing Pinghe said its isolated safety barrier range carries ATEX, IECEx and SIL3 certification. - Beijing Pinghe said its signal isolator range extends functional safety coverage to measurement loops feeding the control system. - The company said certification documentation includes hazardous-area classification, safety integrity level and test records behind both ratings. - The company said intrinsically safe equipment is used at the field interface in fire detection systems so detector signals reach alarm logic without carrying ignition energy into the hazardous zone.

Between the lines: - The article draws a sharp line between two compliance needs: preventing ignition in a hazardous area and ensuring a safety function works when demanded. - Dual certification can make a product more useful across international projects because ATEX supports European jobs while IECEx supports broader global use. - A single manufacturer holding both certification families may simplify engineering reviews because the buyer can evaluate one set of evidence instead of reconciling multiple suppliers' documents. - The emphasis on a dual-certified portfolio suggests Beijing Pinghe is positioning itself as a one-stop source for hazardous-area and safety-instrumented signal interface hardware.

What's next: - Beijing Pinghe said product-specific questions about ATEX, IECEx and SIL3 certified equipment can be sent through its website. - Buyers evaluating signal interface equipment are likely to compare certification records, hazard-zone suitability and safety-integrity data before award decisions. - The company said its sales team is available for follow-up on certification coverage and project review.

The bottom line: - ATEX and IECEx protect against ignition risk; SIL3 protects against failure risk. - For high-risk industrial projects, the key procurement question is whether one product line can prove both.