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Standard Overview Products Used in Testing Related Compliance Standards

Standard Overview
The purpose of ISO 7637-2 is to ensure electromagnetic compatibility of passenger and commercial vehicles operating on 12V or 24V electrical systems. ISO 7637-2 requires multiple conducted transients to be coupled onto DC lines to test the compatibility of vehicles. This standard is applicable to both internal combustion engine and electric motor vehicles.
 

Equipment Required:
Transient Generator - HILO CAR TEST 14
Oscilloscope - Tektronix MDO4104C
Differential Probe - Probe Master 4234

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ISO 7637-2 Test Pulses

The following tables show data that highlights Pulse 1, Pulse 2a, Pulse 2b, Pulse 3a, and Pulse 3b.

Pulse 1

ISO 7637-2 Pulse 1 is used to simulate the transients created in the case that a motor, or inductive load, is disconnected from the circuit.   
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Parameters of this pulse can be verified using an oscilloscope and differential probe to meet the specifications below.
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Pulse 2a

ISO 7637-2 Pulse 2a is used to simulate transients that occur when there is a current interruption on a device in parallel with the DUT and caused by the wiring harness inductance.

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Pulse 2b

ISO 7637-2 Pulse 2b is used to simulate transients when a vehicle is turned off, but electric DC motors remain active and serve as a generator.

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Pulse 3a

The pulse 3a is similar to an EFT pulse as seen in IEC 61000-4-4 (HYPERLINK THIS), this transient waveform is simulating switching occuring in a system connected by a wiring harness, in which the load is capacitive or inductive.

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Pulse 3b

Similar to pulse 3a, except opposite polarity. Pulse 3b is another EFT waveform representing switching within a wire harness. These pulses also simulate the scenario in which a fuse is blown.
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Pulse 4, 5a, & 5b

ISO 7637 Pulse 4, Pulse 5a/5b were removed from the most recent revision of ISO 7637-2 and can be found now in ISO 16750-2.
 

ISO 7637-2 Test Equipment

ATEC recommends the following products for testing according to ISO-7637-2. Please, feel free to reach out to an ATEC rental agent today for help deciding ont he right ISO 7637 compliant equipment or request a quote on our website. 

Products Used in Testing
Teseq AES 5501 Automotive Emissions Test System for ISO 7637-2

Teseq AES 5501 Automotive Emissions Test System for ISO 7637-2

  • The only complete, compliant solution for ISO 7637-2 emissions testing
  • Clean, reliable 100 A operation with very low voltage drop
  • Industry standard relay footprint for a wide selection of relays (one 100 A relay included)
Teseq HV-AN 150

Teseq HV-AN 150 LISN

  • Current: 150A
  • Frequency Range: 100kHz - 100MHz
  • Inductance: 5μH
PMM L1-150M Single-Path LISN

PMM L1-150M Single-Path LISN

  • Current: 100A (Cont.), 150A (Max)
  • Frequency: 100kHz - 200MHz
  • Max Voltage: 300VAC, 600VAC
AE Techron DSR 100-200 | Pulse 2B and 4

AE Techron DSR 100-200 | Pulse 2B and 4

  • 4-Quadrant – Can source and sink current.
  • ±80V – DC supply for 12V to 48V systems; meets 80V surge requirements.
  • 300 kHz Sine – DC ripple tests for all major standards.
EM Test ISO Automotive Rack

EM Test ISO Automotive Rack

  • All the test equipment fits
  • Complete cabling of the power supply, GPIB/USB control lines
  • Central reference ground plane per ISO 7637-2
EM Test Automotive Transient Emission Set 100 kHz - 125 MHz

EM Test Automotive Transient Emission Set 100 kHz - 125 MHz

  • BS 200N100 - Electronic switch, 60V DC/100A: Volt.Drop <1.2V@100A, <0.2V@25A Peak voltage max. 1,000V Reverse-polarity/short-circuit protected
  • Volt.Drop <1.2V@100A, <0.2V@25A
  • Peak voltage max. 1,000V
AE Techron 3110 Standards Waveform Generator

AE Techron 3110 Standards Waveform Generator

  • Includes a large library of Automotive and Aviation Standards’ test routines--complete list available as Supplemental Document under Datasheet on left
  • Drag and drop interface makes it easy to modify existing tests or build new waveform sequences
  • Loop entire tests or test sections; repeat loops with increments of up to four variables
EM Test VDS 200N100 Voltage Drop Simulator 60 V, 100 A

EM Test VDS 200N100 Voltage Drop Simulator 60 V, 100 A

  • Voltage up to 60 V
  • Current up to 100A
  • Bipolar-amplifier models available
EM Test UCS 200N Automotive Transient Generator for ISO 7637

EM Test UCS 200N Automotive Transient Generator for ISO 7637

  • Built-in EFT/Burst generator module
  • Built-in Micropulse generator module (ISO 7637, JASO, SAE and NISSAN)
  • Built-in coupling network 60V, up to 200A
EM Test VDS 200N30 Voltage Drop Simulator | 60 V, 30 A

EM Test VDS 200N30 Voltage Drop Simulator | 60 V, 30 A

  • Voltage up to 60 V
  • Current up to 30A
  • Bipolar-amplifier models available
EM Test VDS 200N Voltage Drop Simulator

EM Test VDS 200N Voltage Drop Simulator

  • Voltage up to 60V
  • Current up to 200A (peak up to 1,000A)
  • Bipolar-amplifier models available
AE Techron 7224 Power Amplifier

AE Techron 7224 Linear Power Amplifier

  • Frequency Range: DC – 300 kHz
  • Gain: Voltage Mode: 20 V
  • Max Output Power: 1,100 W RMS
AE Techron 7228 Linear Power Amplifier

AE Techron 7228 Linear Power Amplifier

  • DC – 1 MHz
  • Gain: 20V
  • AC Power: 1000W RMS
Solar Electronics Line Impedance Stabilization Networks (LISNs)

Solar Electronics Line Impedance Stabilization Networks (LISNs)

  • Current: 10A (Min.), 100A (Max.)
  • Frequency: 150kHz - 500MHz (Max.)
  • Inductance: 5µH (Min.), 650µH (Max.)