GB/Z 3836.37-2025: Explosive atmospheres - Part 37: Equipment protection by 2-wire intrinsically safe ethernet concept (2-WISE)

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Scope

This document specifies the requirements for the structure, marking and documentation of
devices and systems using the 2-wire intrinsically safe ethernet (2-WISE) concept.
NOTE. for example, the physical layer specification for 2-wire ethernet 10BASE-T1L defined in
IEEE 802.3cg-2019.
This document applies to devices and systems employing the 2-wire intrinsically safe ethernet
(2-WISE) concept.
2-WISE is an advanced physical layer (APL) concept designed to simplify the verification
process of intrinsic safety parameters for elements and wiring within APL segments. This is
achieved by defining general intrinsic safety parameter limits for APL ports, based on specific
hazardous area requirements, and in addition, a concise set of segmentation rules are listed.
Components of a 2-WISE device may be protected by any explosion-proof type listed in GB/T
3836.1 applicable to EPL in intended hazardous locations. In these cases, the requirements of
this document apply only to the intrinsically safe circuit of the device.
This document is used in conjunction with GB/T 3836.1, GB/T 3836.4, GB 3836.15 or GB/T
3836.18.

Basic Data

Standard ID	GB/Z 3836.37-2025 (GB/Z3836.37-2025)
Description (Translated English)	Explosive atmospheres - Part 37: Equipment protection by 2-wire intrinsically safe ethernet concept (2-WISE)
Sector / Industry	National Standard
Classification of Chinese Standard	K35
Classification of International Standard	29.260.20
Word Count Estimation	18,110
Date of Issue	2025-12-03
Date of Implementation	2025-12-03
Issuing agency(ies)	State Administration for Market Regulation, Standardization Administration of China