Modular Automotive Transient Immunity Testing
The KIKUSUI KES7700 Series is a modular transient immunity test system designed to reproduce conducted electrical transients encountered by automotive electronic components and systems.
The system combines a KES7702 or KES7703 mainframe with dedicated pulse-generation modules. This architecture supports Pulse 1, Pulse 2a, Pulse 3a/3b, and Pulse 5a/5b testing while allowing pulse hardware to be configured for applicable ISO, SAE, JASO, and automotive manufacturer-specific requirements.
Pulse 1 / 2a / 3a / 3b
Conducted transient pulse generation for automotive immunity testing
Pulse 5a / 5b
Load-dump transient simulation
50 A / 100 A CDN
Two mainframe configurations for EUT power-line requirements
Up to 7 Pulse Modules
Five plug-in plus two external-connect pulse systems
The KES7700 mainframes are designed to simplify the ISO 7637-2 test setup, including output terminals positioned 50 mm above the reference ground plane. Front-side output routing and separation of the power and communication systems from the surge-output path help support stable waveform generation and repeatable automotive EMC testing.
Modular Pulse Generator Architecture
Dedicated surge-generator modules are used for individual transient pulse families, allowing the KES7700 system to be configured around the test waveforms required for a specific automotive EMC program.
Pulse 1, 2a, 3a/3b and 5a/5b Support
Available pulse modules reproduce transient waveforms associated with inductive-load disconnection, switching events, electromagnetic coupling, and alternator load-dump conditions.
50 A or 100 A CDN Mainframes
Choose the KES7702 with a 60 V / 50 A CDN or the KES7703 with a 60 V / 100 A CDN according to the EUT power-line current requirement.
ISO-Oriented Test Setup
The mainframe output terminals are positioned 50 mm above the reference ground plane as specified by ISO 7637-2, helping simplify construction of a repeatable conducted-transient test environment.
Automotive Manufacturer-Specific Testing
Replaceable pulse modules and dedicated or custom waveform hardware allow the system to address supported automotive manufacturer-specific transient requirements in addition to standardized test waveforms.
RS232C System Control
The KES7702 and KES7703 provide RS232C communication for PC-based system control, including operation with KIKUSUI KES7100 application software.
Automotive ECU conducted transient immunity testing
Automotive electronic component EMC validation
Inductive-load disconnection transient simulation
Harness and switching transient immunity evaluation
Alternator load-dump Pulse 5a / 5b testing
ISO, SAE, JASO, and supported OEM-specific automotive transient testing
KES7700 Mainframe Comparison
| Specification | KES7702 | KES7703 |
|---|---|---|
| Mainframe Type | 50 A CDN | 100 A CDN |
| CDN Maximum Voltage | 60 V DC | 60 V DC |
| CDN Maximum Current | 50 A | 100 A |
| Pulse Modules — Plug-In | Up to 5 | Up to 5 |
| Pulse Modules — External Connect | Up to 2 | Up to 2 |
| PC Interface | RS232C | RS232C |
| Input | 100 to 240 Vac, 50/60 Hz, factory-configured | 100 to 240 Vac, 50/60 Hz, factory-configured |
| Power Consumption | 500 VA or less | 500 VA or less |
| Dimensions | 440 W × 405 H × 605 D mm | 440 W × 405 H × 620 D mm |
| Weight | Approx. 45 kg | Approx. 48 kg |
KES7700 Pulse Module Lineup
| Pulse / Function | Model | Architecture | Key Capability |
|---|---|---|---|
| Pulse 1 — 12 V System | KES7711A | Plug-in | ±20 V to ±150 V |
| Pulse 1 — 24 V / 50 A System | KES7713B | External-connect | ±20 V to ±700 V |
| Pulse 1 — 24 V / 100 A System | KES7714 | External-connect | ±20 V to ±700 V |
| Pulse 2a | KES7721 | Plug-in | ±20 V to ±150 V |
| Pulse 3a / 3b | KES7731 | Plug-in | ±20 V to ±300 V |
| Pulse 5a / 5b — 50 A System | KES7750 | External-connect | +40 V to +200 V* |
| Pulse 5a / 5b — 100 A System | KES7751 | External-connect | +40 V to +200 V* |
*For KES7750/KES7751, the maximum setting is +150 V when the output impedance is 0.5 Ω.
Automotive Transient Test Standards
| ISO 7637-2 | KIKUSUI documents KES7700 Series compliance with ISO 7637-2:2004 and ISO 7637-2:2011. Relevant KES7700 pulse systems include Pulse 1 and Pulse 2a. |
|---|---|
| ISO 7637-3 | KIKUSUI documents compliance with ISO 7637-3:2007. KES7731 generates Pulse 3a / 3b waveforms for fast transient coupling tests. |
| ISO 16750-2 | KIKUSUI documents compliance with ISO 16750-2:2010, including Pulse 5a / 5b load-dump testing using the applicable KES7750 / KES7751 system configuration. |
| SAE J1113 | Supported by applicable KES7700 pulse configurations. KIKUSUI specifically identifies ISO and SAE pulse support for the Pulse 1 and Pulse 5a / 5b generator families. |
| JASO D001 | JASO D001-94 transient-voltage testing is supported using optional dedicated pulse hardware. |
| Automotive OEM Requirements | Supported through applicable pulse modules, waveform libraries, optional hardware, and custom configurations depending on the manufacturer's test requirement. |
Automotive Transient Pulse Functions
| Pulse 1 | Simulates the negative transient generated when power is disconnected from an inductive load. |
|---|---|
| Pulse 2a | Generates a positive transient pulse for applicable automotive conducted transient test requirements. |
| Pulse 3a / 3b | Fast negative and positive transient pulses used to simulate switching-related electromagnetic coupling. |
| Pulse 5a | Simulates an unsuppressed alternator load-dump transient when the vehicle battery is disconnected. |
| Pulse 5b | Simulates a suppressed load-dump condition using the applicable load-dump suppression configuration. |
Pulse 5a / 5b Load Dump Testing
| Pulse Generators | KES7750 (50 A) / KES7751 (100 A) |
|---|---|
| Peak Voltage | +40.0 V to +200.0 V in 0.1 V steps |
| 0.5 Ω Peak Voltage Limit | +40.0 V to +150.0 V |
| Output Impedance | 0.5 Ω / 1 Ω / 2 Ω / 4 Ω / 6 Ω / 8 Ω |
| Rise Time | 10 ms (+0 ms / −5 ms) |
| Selectable Pulse Width | 40 ms to 700 ms using specified discrete settings |
| Pulse 5b Suppressor | SPEC80677 for 50 A systems / SPEC80678 for 100 A systems |
Pulse 3a / 3b Fast Transient Generation
| Pulse Module | KES7731 |
|---|---|
| Architecture | Plug-in |
| Peak Voltage | ±20 V to ±300 V, 0.1 V steps |
| Output Impedance | 50 Ω |
| Rise Time | 5 ns ±1.5 ns |
| Pulse Width | 150 ns ±45 ns |
| Pulse Frequency | 1 kHz to 100 kHz in 1 kHz steps |
System Control & Automation
| Mainframe Interface | RS232C |
|---|---|
| Application Software | KIKUSUI KES7100 |
| Transient Pulse Control | Up to seven pulse-module types |
| Test Execution List | Up to 50 test conditions |
| Test Results | User OK / NG judgment can be stored with the execution list |
| Report Output | CSV report creation supported |
| Mainframe Monitor Output | 100:1 monitor terminal |
| Safety / External Control | External stop terminal, warning-lamp output, emergency stop, and EUT DC power-supply analog-control output |
