ISO 11452-4:2020

INTERNATIONAL ISO
STANDARD 11452-4
Fifth edition
2020-04
Road vehicles — Component test
methods for electrical disturbances
from narrowband radiated
electromagnetic energy —
Part 4:
Harness excitation methods
Véhicules routiers — Méthodes d'essai d'un équipement soumis
à des perturbations électriques par rayonnement d'énergie
électromagnétique en bande étroite —
Partie 4: Méthodes d'excitation des faisceaux
Reference number
©
ISO 2020
© ISO 2020
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ii © ISO 2020 – All rights reserved

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Test conditions . 1
5 Test location . 2
6 Test instrumentation . 2
6.1 BCI test method . 2
6.1.1 General. 2
6.1.2 Injection probe . 3
6.1.3 Current measurement probe . 3
6.1.4 Stimulation and monitoring of the DUT . 3
6.2 TWC test method . 3
6.2.1 General. 3
6.2.2 Tubular wave coupler . 3
6.2.3 50 Ω load resistor . 4
6.2.4 Stimulation and monitoring of the DUT . 4
7 Test set-up for DUT powered by an unshielded power system . 4
7.1 Ground plane . 4
7.2 Power supply and AN . 4
7.3 Location of the DUT . 5
7.4 Location of the test harness . 5
7.5 Location of the load simulator . 5
7.6 Location of the harness excitation . 6
7.6.1 BCI test method. 6
7.6.2 TWC test method . 6
8 Test setup for DUT powered by a shielded power system .10
8.1 Ground plane .10
8.2 Power supply and AN, HV-AN, AMN and AAN .10
8.3 Location of DUT .10
8.4 Location of test harness .11
8.5 Location of load simulator .12
8.6 Location of the harness excitation .12
8.6.1 BCI test method.12
8.6.2 TWC test method .13
9 Test procedure .26
9.1 General .26
9.2 Test plan .26
9.3 Test methods .26
9.3.1 BCI test method.26
9.3.2 Tubular wave coupler test method .29
9.4 Test report .30
Annex A (normative) Calibration configuration (current injection probe calibration) .32
Annex B (informative) Test set-up transfer impedance.34
Annex C (informative) Remote/local grounding .40
Annex D (informative) Function performance status classification (FPSC) .42
Foreword
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ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
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described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
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iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 32,
Electrical and electronic components and general system aspects.
This fifth edition cancels and replaces the fourth edition (ISO 11452-4:2011), which has been technically
revised. The main changes compared to the previous edition are as follows:
— extension of the frequency range for BCI test method down to 100 kHz;
— introduction to reference to additional artificial networks (HV-AN, AMN, AAN) for DUT powered by
a shielded power system;
— precisions for ground plane dimensions;
— addition of test set-up descriptions and Figures for DUT powered by a shielded power system;
— precisions for DUT with multiple connectors; and
— suppression of Annex C relative to artificial networks which are now defined in ISO 11452-1.
A list of all parts in the ISO 11452 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body.
A complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2020 – All rights reserved

INTERNATIONAL STANDARD ISO 11452-4:2020(E)
Road vehicles — Component test methods for electrical
disturbances from narrowband radiated electromagnetic
energy —
Part 4:
Harness excitation methods
1 Scope
This document specifies harness excitation test methods and procedures for determining the immunity
of electronic components of passenger cars and commercial vehicles regardless of the propulsion
system (e.g. spark-ignition engine, diesel engine, electric motor).
The bulk current injection (BCI) test method is based on current injection into the wiring harness using
a current probe as a transformer where the harness forms the secondary winding.
The tubular wave coupler (TWC) test method is based on a wave coupling into the wiring harness
using the directional coupler principle. The TWC test method was developed for immunity testing of
automotive components with respect to radiated disturbances in the GHz ranges (GSM bands, UMTS,
ISM 2,4 GHz). It is best suited to small (with respect to wavelength) and shielded device under test
(DUT), since in these cases the dominating coupling mechanism is via the harness.
The electromagnetic disturbances considered in this document are limited to continuous narrowband
electromagnetic fields.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 11452-1:2015, Road vehicles — Component test methods for electrical disturbances from narrowband
radiated electromagnetic energy — Part 1: General principles and terminology
3 Terms and definitions
For the purposes of this document, the te
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