Automotive EMC

Introduction

Electromagnetic compatibility (EMC) is a characteristic of electrical and electronic equipment that permits it to operate as intended in the presence of other electrical and electronic equipment, and not to adversely interfere with that other equipment. All such equipment emits electrical energy, and some of that emitted energy may interact and interfere with other equipment. Equally, equipment may be susceptible to receiving energy emitted from other sources.

Obviously, radio transmitters and receivers are intended to emit and receive electrical energy, but other equipment may not be intended to do so. Even transmitters and receivers may emit and receive unwanted energy that may prevent those devices, or others, from functioning as intended. It is part of the EMC 'art' to design and operate equipment so that it is both prevented from emitting spurious energy that can cause interference, and that it is immune to the adverse effects of any spurious energy that it may receive.

EMC regulation

As the effects of interference have severe consequences, EMC is frequently a subject of national and international regulation. Within Europe, EMC regulation is managed mainly through the European Commission's EMC Directive (89/336/EEC, subsequently revised as 2004/108/EC).

However, electrical equipment (including telecommunications equipment) intended to be fitted to a motor vehicle are considered to be 'Electronic Sub Assemblies (ESA)' and are required to meet Automotive EMC requirements. These requirements are set out in Directive 2004/104/EC, a specific Directive which forms part of European legislation for automotive type approval. The annexes of this Directive contain all the technical requirements necessary to demonstrate conformance which allows the ESA to be placed on the market.

The Directive covers two categories of after market equipment ESAs:

a) After market equipment intended for installation in a motor vehicle, and which are not related to immunity related functions of the motor vehicle. As a general rule these are ESAs which are not related to an immunity-related function of the motor vehicle, are connected directly to the vehicle's dc supply, and are not involved/related with any of the vehicle functions (described in Annex 1, clause 2.1.12 of the Directive).

b) After market equipment intended for installation in a motor vehicle, and which is related to immunity related functions of the motor vehicle, as set out in Annex 1, clause 2.1.12 of the Directive, is subject to full type approval requirements of the Directive.

The Automotive EMC Directive recognizes conformity according to the procedures of the EMC Directive and the Radio Equipment Directive (RED). This includes the CE marking for after market ESAs described in category a) above, but additionally requires that the limits of the clauses referenced in Annex 1, clause 3.2.9 of the Automotive EMC Directive are fulfilled.

Our Role & Activities

ETSI produces European standards for EMC for a wide range of information and communication technologies.

The EN 301 489 series of standards specifies relevant EMC requirements for radio communications equipment, and several parts of this series have been updated to take account of the additional technical requirements of the Automotive EMC Directive. Of particular note:

  • EN 301 489-1 (general EMC requirements for radio equipment)
  • EN 301 489-7 (specific EMC requirements for GSM terminals)
  • EN 301 489-24 (specific EMC requirements for IMT-2000 CDMA Direct Spread (UTRA) terminals)

Standards

The following is a list of the 20 latest published ETSI standards on automotive EMC.

A full list of related standards in the public domain is accessible via the ETSI standards search. Via this interface you can also subscribe for alerts on updates of ETSI standards.

For work in progress see the ETSI Work Programme on the Portal.

Standard No. Standard title.
TR 103 088 Electromagnetic compatibility and Radio spectrum Matters (ERM); Using the ETSI EN 301 489 series of EMC standards
TR 101 651 Classification of the electromagnetic environment conditions for equipment in telecommunication networks
TR 103 332 Electromagnetic compatibility and Radio spectrum Matters (ERM); Impact of CENELEC EN 55032 on ETSI EMC Standards
EN 301 489-4 Electromagnetic compatibility and Radio spectrum Matters (ERM); ElectroMagnetic Compatibility (EMC) standard for radio equipment and services; Part 4: Specific conditions for fixed radio links and ancillary equipment
EN 301 489-6 Electromagnetic compatibility and Radio spectrum Matters (ERM); ElectroMagnetic Compatibility (EMC) standard for radio equipment and services; Part 6: Specific conditions for Digital Enhanced Cordless Telecommunications (DECT) equipment
EN 301 489-35 Electromagnetic compatibility and Radio spectrum Matters (ERM); ElectroMagnetic Compatibility (EMC) standard for radio equipment and services; Part 35: Specific requirements for Low Power Active Medical Implants (LP-AMI) operating in the 2 483,5 MHz to 2 500 MHz bands
EN 301 489-3 Electromagnetic compatibility and Radio spectrum Matters (ERM); ElectroMagnetic Compatibility (EMC) standard for radio equipment and services; Part 3: Specific conditions for Short-Range Devices (SRD) operating on frequencies between 9 kHz and 246 GHz
EN 301 489-34 Electromagnetic compatibility and Radio spectrum Matters (ERM); ElectroMagnetic Compatibility (EMC) standard for radio equipment and services; Part 34: Specific conditions for External Power Supply (EPS) for mobile phones
EN 301 489-50 Electromagnetic compatibility and Radio spectrum Matters (ERM); ElectroMagnetic Compatibility (EMC) standard for radio equipment and services; Part 50: Specific conditions for Cellular Communication Base Station (BS), repeater and ancillary equipment
EN 301 489-17 Electromagnetic compatibility and Radio spectrum Matters (ERM); ElectroMagnetic Compatibility (EMC) standard for radio equipment; Part 17: Specific conditions for Broadband Data Transmission Systems
EN 301 489-23 Electromagnetic compatibility and Radio spectrum Matters (ERM); ElectroMagnetic Compatibility (EMC) standard for radio equipment and services; Part 23: Specific conditions for IMT-2000 CDMA, Direct Spread (UTRA and E-UTRA) Base Station (BS) radio, repeater and ancillary equipment
EN 301 489-1 Electromagnetic compatibility and Radio spectrum Matters (ERM); ElectroMagnetic Compatibility (EMC) standard for radio equipment and services; Part 1: Common technical requirements
EN 301 489-24 Electromagnetic compatibility and Radio spectrum Matters (ERM); ElectroMagnetic Compatibility (EMC) standard for radio equipment and services; Part 24:Specific conditions for IMT-2000 CDMA Direct Spread (UTRA and E-UTRA) for Mobile and portable (UE) radio and ancillary equipment
EG 202 414 Electromagnetic compatibility and Radio spectrum Matters (ERM); Guide to the demonstration of conformity for after market Electric/electronic Sub-Assemblies (ESAs) to the motor vehicle EMC Directive 2004/104/EC
EN 301 489-29 Electromagnetic compatibility and Radio spectrum Matters (ERM); ElectroMagnetic Compatibility (EMC) standard for radio equipment and services; Part 29: Specific conditions for Medical Data Service Devices (MEDS) operating in the 401 MHz to 402 MHz and 405 MHz to 406 MHz bands
EN 301 489-33 Electromagnetic compatibility and Radio spectrum Matters (ERM); ElectroMagnetic Compatibility (EMC) standard for radio equipment and services; Part 33: Specific conditions for Ultra Wide Band (UWB) communications devices
EN 301 489-12 Electromagnetic compatibility and Radio spectrum Matters (ERM); ElectroMagnetic Compatibility (EMC) standard for radio equipment and services; Part 12: Specific conditions for Very Small Aperture Terminal, Satellite Interactive Earth Stations operated in the frequency ranges between 4 GHz and 30 GHz in the Fixed Satellite Service (FSS)
EN 301 489-9 Electromagnetic compatibility and Radio spectrum Matters (ERM); ElectroMagnetic Compatibility (EMC) standard for radio equipment and services; Part 9: Specific conditions for wireless microphones, similar Radio Frequency (RF) audio link equipment, cordless audio and in-ear monitoring devices
TR 102 552 Electromagnetic compatibility and Radio spectrum Matters (ERM); Broadband Electronic Communications through Powerlines: A code of Practice relating to the Standardization of the Measurement of Emission, Data Collection and Reporting of Results
EN 301 489-11 Electromagnetic compatibility and Radio spectrum Matters (ERM); ElectroMagnetic Compatibility (EMC) standard for radio equipment and services; Part 11: Specific conditions for terrestrial sound broadcasting service transmitters