What the MMAIATEX optical, IS and selector switch guides cover
The three resources answer different procurement questions. They are designed to help a project team ask for controlled records before it accepts a model, circuit or assembly.
| New public guide | Primary reader question | Evidence boundary |
|---|---|---|
| ATEX EN IEC 60079-28:2026 update | What changed in the EU harmonised-standards list and when does the older reference leave the list? | An Official Journal citation does not certify a product |
| Intrinsic safety entity parameter matching | How should Uo, Io, Po, Co and Lo first be screened against Ui, Ii, Pi, Ci, Li and cable values? | Five comparisons do not complete a system assessment |
| Explosion-proof selector switch buyer FAQs | Which positions, actions, contacts, ratings, mounting details and Ex records belong in an RFQ? | Operator appearance and IP rating do not prove function or Ex suitability |
A current ATEX optical-radiation reference
The Industry Insights article explains Commission Implementing Decision (EU) 2026/1967. The decision added EN IEC 60079-28:2026 to the ATEX harmonised-standards list from September 4, 2026. Its provision deleting the EN 60079-28:2015 row applies from March 4, 2028.
The guide keeps the European reference distinct from IEC 60079-28:2025, the international IEC publication. It also explains that presumption of conformity is limited to the essential requirements covered by the cited standard or relevant parts. Buyers are directed to compare the exact model, optical function, declaration, assessment basis, standard edition, certificate where applicable and transition record.
A system-level intrinsic safety screen
The Technical Knowledge article defines the common first-screen relationships Uo <= Ui, Io <= Ii, Po <= Pi, Ci plus cable capacitance <= Co, and Li plus cable inductance <= Lo. It then explains why the cable, every connected apparatus contribution and the actual topology remain part of the assessment.
The guide uses the current IEC 60079-25:2020+AMD1:2025 CSV system context and notes that IEC 60079-11:2023 is marked Corrected Version 2026-07 on the official IEC page. It does not turn a passing spreadsheet screen into approval. Mixed capacitance and inductance, multiple sources, group, EPL, temperature, ambient range, Um, isolation, earthing, segregation and certificate conditions still require competent review.
Twelve selector-switch procurement questions
The FAQ distinguishes a selector switch from an isolator, emergency stop and switch-disconnector. Its 12 direct answers cover maintained and spring-return action, positions, contact sequence, utilization category, panel interface, component combinations, ingress protection and the handover dossier.
The functional reference is IEC 60947-5-1:2024, while the article keeps explosion protection within the separate IEC 60079 and exact-certificate evidence layer. It also links to existing MMAIATEX resources on contact numbering, push buttons, control stations, emergency stops, IP classification and nameplate review so readers can follow the narrower question that applies to their project.
How procurement teams can use this update
Start with the guide that matches the decision being made, then freeze the exact product or system identity. Retrieve the current certificate status and scope, schedule, declaration where applicable, drawings, instructions, special conditions and destination-market requirements. Record who reviewed each item and which revision controlled the decision.
The MMAIATEX certificate and document verification guide offers a reusable identity-first check. The public About page provides the current company-level certification statement. Neither page replaces project engineering or a competent conformity decision.
What this company update does not announce
This update records publication of three educational guides. It does not announce a customer project, product launch, completed test, certificate award, new production capacity, sales result or change to the certification status of any model. The representative photographs used with the articles are editorial illustrations from the MMAIATEX media library, not evidence of a protection concept or certificate scope.
Current MMAIATEX certification status
The public MMAIATEX About page states that ATEX, IECEx and CCC certification work is in progress. MMAIATEX Explosion-proof Technology (Zhejiang) Co., Ltd. does not present these guides, a standard reference, an IP rating, a product category or a representative photograph as proof that a particular model or completed assembly is certified.
Buyers should request and verify the exact legal manufacturer, model and suffix, complete marking, current certificate status and scope, schedules, declarations where applicable, instructions and destination requirements before selection or use.
Safety and legal disclaimer
These articles provide general procurement education. They do not classify a hazardous area, design or approve an installation, perform a conformity assessment, certify an intrinsically safe system, validate a functional-safety function or replace competent review under current standards, applicable law and exact product documentation.
Request the records for your application
Send the destination, area classification, required function, exact model or system identities, electrical duty and document list. MMAIATEX can identify available product information for review by the responsible engineering, EHS and compliance teams.