ISO 11452-4:2020
Road vehicles — Component test methods for electrical disturbances from narrowband radiated electromagnetic energy — Part 4: Harness excitation methods
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.
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Test conditions
5 Test location
6 Test instrumentation
6.1 BCI test method
6.1.1 General
6.1.2 Injection probe
6.1.3 Current measurement probe
6.1.4 Stimulation and monitoring of the DUT
6.2 TWC test method
6.2.1 General
6.2.2 Tubular wave coupler
6.2.3 50 Ω load resistor
6.2.4 Stimulation and monitoring of the DUT
7 Test set-up for DUT powered by an unshielded power system
7.1 Ground plane
7.2 Power supply and AN
7.3 Location of the DUT
7.4 Location of the test harness
7.5 Location of the load simulator
7.6 Location of the harness excitation
7.6.1 BCI test method
7.6.2 TWC test method
8 Test setup for DUT powered by a shielded power system
8.1 Ground plane
8.2 Power supply and AN, HV-AN, AMN and AAN
8.3 Location of DUT
8.4 Location of test harness
8.5 Location of load simulator
8.6 Location of the harness excitation
8.6.1 BCI test method
8.6.2 TWC test method
9 Test procedure
9.1 General
9.2 Test plan
9.3 Test methods
9.3.1 BCI test method
9.3.2 Tubular wave coupler test method
9.4 Test report
Annex A (normative) Calibration configuration (current injection probe calibration)
Annex B (informative) Test set-up transfer impedance
Annex C (informative) Remote/local grounding
Annex D (informative) Function performance status classification (FPSC)
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Test conditions
5 Test location
6 Test instrumentation
6.1 BCI test method
6.1.1 General
6.1.2 Injection probe
6.1.3 Current measurement probe
6.1.4 Stimulation and monitoring of the DUT
6.2 TWC test method
6.2.1 General
6.2.2 Tubular wave coupler
6.2.3 50 Ω load resistor
6.2.4 Stimulation and monitoring of the DUT
7 Test set-up for DUT powered by an unshielded power system
7.1 Ground plane
7.2 Power supply and AN
7.3 Location of the DUT
7.4 Location of the test harness
7.5 Location of the load simulator
7.6 Location of the harness excitation
7.6.1 BCI test method
7.6.2 TWC test method
8 Test setup for DUT powered by a shielded power system
8.1 Ground plane
8.2 Power supply and AN, HV-AN, AMN and AAN
8.3 Location of DUT
8.4 Location of test harness
8.5 Location of load simulator
8.6 Location of the harness excitation
8.6.1 BCI test method
8.6.2 TWC test method
9 Test procedure
9.1 General
9.2 Test plan
9.3 Test methods
9.3.1 BCI test method
9.3.2 Tubular wave coupler test method
9.4 Test report
Annex A (normative) Calibration configuration (current injection probe calibration)
Annex B (informative) Test set-up transfer impedance
Annex C (informative) Remote/local grounding
Annex D (informative) Function performance status classification (FPSC)