ISO 7637-2-2011 PDF

Full title and description

Road vehicles — Electrical disturbances from conduction and coupling — Part 2: Electrical transient conduction along supply lines only. This international standard specifies bench test methods and procedures to evaluate the compatibility of electrical/electronic equipment installed on road vehicles against conducted transients on supply lines (12 V and 24 V systems).

Abstract

ISO 7637-2:2011 defines the test pulses, injection and measurement methods, and function-performance status classification used to assess immunity of vehicle electrical/electronic equipment to conducted transients along supply lines. It is applicable to passenger cars, commercial vehicles and other road vehicles regardless of propulsion type.

General information

• Status: Published (confirmed).
• Publication date: March 2011 (Edition 3, published March 2011).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 43.040.10 (Electrical and electronic equipment; road-vehicle related electrical disturbances).
• Edition / version: Edition 3 (2011).
• Number of pages: 43 pages (official ISO publication page shows 43 pages for the 2011 edition).

Scope

Specifies bench test procedures for injection and measurement of conducted electrical transients on vehicle supply lines to verify immunity of installed equipment. Covers typical pulse waveforms, test levels/severities, instrumentation requirements, and classification of function-performance status under transient exposure. Applicable to equipment for 12 V and 24 V vehicle electrical systems and to all road-vehicle types independent of propulsion.

Key topics and requirements

• Defined test pulses and waveforms for conducted transients on supply lines (including definitions of pulse shape and severity levels).
• Procedures for pulse injection and measurement on bench test setups.
• Requirements and verification methods for pulse generators and test instrumentation.
• Function-performance status classification to record equipment behaviour under transient exposure.
• Normative and informative annexes (e.g., pulse generator verification, transient emissions evaluation, origin of transients, alternative test techniques).

Typical use and users

Used by automotive OEMs, vehicle-systems and component manufacturers, EMC test laboratories, and suppliers of vehicle electrical/electronic modules to verify immunity to supply-line transients during product development, qualification and compliance testing. Also referenced by engineering teams for specifying protection, filtering and surge-mitigation designs.

Related standards

ISO 7637 is a multipart series; closely related parts and documents include ISO 7637-1 (definitions and general considerations), ISO 7637-3 (transient transmission by capacitive/inductive coupling via non-supply lines), ISO/TS or ISO/TR documents addressing high-voltage/shielded lines and pulse-generator harmonization (Part 4, Part 5), and complementary vehicle EMC/environment standards such as ISO 16750-2.

Keywords

ISO 7637-2, conducted transients, supply lines, road vehicles, EMC immunity, pulse generator, bench test, 12 V, 24 V, function-performance status

FAQ

Q: What is this standard?

A: ISO 7637-2:2011 is the part of the ISO 7637 series that specifies bench test methods and requirements for electrical transients conducted along vehicle supply lines.

Q: What does it cover?

A: It covers the definition of test pulses, injection and measurement procedures, verification of pulse generators and test equipment, and classification of equipment function/performance under transient stress for 12 V and 24 V vehicle electrical systems.

Q: Who typically uses it?

A: Automotive manufacturers, component suppliers, EMC laboratories, test engineers and designers of surge-protection or filtering solutions use the standard for product qualification and compatibility testing.

Q: Is it current or superseded?

A: The document is the 2011 (third) edition and is published/confirmed as the active edition. Work to produce an amendment to ISO 7637-2:2011 has been recorded as an active project, so users should check for any issued amendment or newer edition before relying on the standard for compliance decisions.

Q: Is it part of a series?

A: Yes — ISO 7637 is a multipart series addressing electrical disturbances from conduction and coupling; Part 1 (vocabulary/general), Part 2 (this document), Part 3 (coupling via other lines), plus related technical reports and parts for high-voltage lines and pulse harmonization.

Q: What are the key keywords?

A: Conducted transients, supply-line transients, pulse generator, EMC immunity, road vehicles, 12 V, 24 V, bench testing, function-performance classification.