comemso
Contact
Product Finder
Applications
Start with the decisionApplications
Vehicle and charging station
EV TestingVehicle, EVCC and charging-release validation.EVSE TestingCharging-station development through field operation.InteroperabilityReal EV and EVSE in one synchronized test record.
Battery, MCS and EMC
BMS TestingCells, sensors, balancing and controlled faults.BMS + EVCC + OBCValidate the interaction of battery, charging controller and on-board charger.MCS TestingCommunication, signals, cooling and megawatt power.EV Charging EMCKeep charging communication observable under EMC stress.
Production, commissioning and calibration
EVSE End-of-LineRepeatable acceptance and unit-level results.Commissioning & Field ServiceCommission, diagnose and verify installed chargers with an EV charger tester.Calibration & MetrologyTraceable energy verification at the charging point.
Products
Start with the decisionProducts & PlatformsProduct Finder
EVCA
EVCA PlatformCommunication, interoperability, high-power, MCS and EMC paths.EVCA ComOnlyFocused charging communication testing.EVCA Multi MobilePortable laboratory and field analysis.EVCA InteropAnalyse interoperability between a real EV and EVSE.EVCA FlexModular high-power testing and controlled faults.EVCA MCSMegawatt charging communication, low-level signals and system testing.
Easy Chester
Easy Chester PlatformEVSE production, commissioning, service and calibration.Easy Chester MicroWallbox tester for AC chargersEasy Chester UltimateDC fast charger tester (AC/DC)Easy Chester CalimeraAC and DC EVSE calibration systemEasy Chester EOL / EOL HPCEVSE end-of-line production tester
Battery, software and EMC
Battery Cell SimulatorBMS testing from compact bench to high-voltage HiL.SmartCal calibration (accessory)Automated calibration and adjustment of the Battery Cell Simulator.comframeConfiguration, synchronized analysis and automation.EMC LinkOptical charging communication through the chamber boundary.
Software
Start with the decisionSoftware Capabilities
comframe and integration
comframeThe test software for every comemso system.Integration & APIsREST, Python, CI/CD and laboratory orchestration.Protocol & Domain ModulesSelect released domain depth.Capabilities HubConnect the capability model across EV, EVSE and BMS testing.EVCA Capability HubExplore the detailed EV charging capability stack.
Analyse and test
Automated Standards AnalysisMeasured behaviour, normative context and highlighted deviations.Professional SimulationConfigure nominal, boundary and non-conform behaviour.Manipulating GatewayTest a live correction hypothesis between real partners.
Reproduce and automate
Charge PlaybackReproduce the charging partner for the DUT.Charge Cycle AutomationTurn saved configurations into repeatable campaigns.Conformance Test LibrariesVersioned executable standards-based test logic.
Knowledge
Start with the decisionStandards & Knowledge
Standards and test logic
Charging, Safety & EMCCharging behaviour, field safety, editions and test boundaries.Conformance Test LibrariesReleased executable test logic, verdicts and evidence.AFIR for EV ChargingRegulation, responsibility and verifiable evidence.NACS (SAE J3400)Charging communication tests for the North American Charging Standard.UL standards & EVSE field safetyUL requirements and electrical safety checks at installed charge points.
Methods and terminology
Knowledge CenterTechnical explanations, methods and application guidance.GlossaryStable charging and BMS test terminology.EVSE Calibration MethodsCompare controlled real load and reference measurement.Testing a wallboxProcedure, standards, limits and test report for electricians.ISO 15118 explainedParts, -2 vs -20, Plug & Charge and AFIR dates.Battery Cell SimulationCells, balancing, faults, precision and BMS HiL.
Documents and tools
Resources LibraryCurrent brochures, webinars, guides and checklists.BMS testing whitepaperTemperature, environment, simulation and test wiring.EVSE Inspection GuidePractical commissioning and inspection workflow.Charger Uptime CalculatorEstimate downtime and field-service impact.Technical newsletterChoose product updates and events relevant to your tests.
Company
Start with the decisionCompany
Company
About comemsoEngineering purpose, history and operating companies.Development & manufacturingShort paths from development to system testingQuality & CertificationsManagement systems, validation and calibration evidence.Customer ProofNamed stories, endorsements and published configurations.SustainabilityEnvironmental management and measured progress.
People and network
Customer Care TeamDelivery, commissioning, training and support.Sales PartnersRegional commercial and service access.CareersWork on deep e-mobility testing.
Updates and contact
News & EventsProjects, releases, webinars and company updates.Request a technical demoDiscuss your test task with the comemso team.ContactSales, support and locations in one place.
EMC Link inside an EMC test chamber

Optical charging interface for EMC testing

EMC tests during an active charging session – partner outside the chamber.

During the active charging session, EMC Link carries the charging signals over optical fibre between the device in the EMC chamber and its simulated charging partner outside – instead of copper signal lines through the chamber wall.1

Built for EMC test setups to IEC 61851-21-1, IEC 61851-21-2 and UN Regulation No. 10.

Request a 15-minute demo Find your test system
In 30 seconds
What for
EMC laboratories and test teams who must keep a charging session running inside the chamber.
What it does
Carries the charging signals over optical fibre to the simulated partner outside; the chamber-side unit runs on a filtered 12 V DC supply.
Not for
Protocol tests without an EMC chamber – that is EVCA ComOnly.
  • Optical charging communication
  • Real or simulated charging partners
  • Test equipment outside the chamber

Charging faults that only appear under EMC stress stay invisible unless the session keeps running in the closed chamber.

Architecture and test setups

Device under test in the chamber, simulation and analysis outside

Chamber-side and external units match the device under test (DUT) and its charging counterpart.

Inside the chamber

The DUT and compact EMC Link unit, with a filtered 12 V DC supply for the chamber-side unit.

Optical connection

Two optical fibre cables connect the chamber-side and external units.

Outside the chamber

The external unit connects to the simulated charging counterpart. A compatible EVCA/comframe configuration handles simulation, operation and analysis.

Configured signal paths

Select signal paths for your charging interface.

We configure the signal paths for the charging technology and modules in your test setup.

PLC communication

High-level powerline communication for applicable charging technologies.

Low-level charging signals

CP/PP, CS1/CS2, CC1/CC2, CE/ID and temperature, according to the selected configuration.

Auxiliary handling

A relay contact for digital control of the opposite-side 12 V auxiliary environment, where configured.

CAN and Ethernet

Supporting data paths for the selected test architecture.

How the components work together in the test setup

Optical signal transport
EMC Link and the selected modules carry the released signal paths transparently.
Simulation and analysis
The connected test system handles simulation, protocol decoding, manipulation, logging and automation. A compatible EVCA/comframe configuration provides these functions when included in the setup.
Charging power and safety
External sources, loads and laboratory infrastructure provide power conversion, charging power, cooling and safety functions. EMC Link does not transfer charging power.
EMC measurement and assessment
The laboratory provides the stimulus, instruments, limits and assessment according to the agreed test plan. EMC Link does not produce an EMC compliance verdict.
EMC Link positioned on a chamber workbench
EMC Link in comemso’s own EMC chamber. Measurement scope and chamber limitations.

Technology-specific modules

Choose the charging technology and matching modules.

Software-controlled selection works within the supported scope.

AC

Control Pilot and proximity paths for charging-state behaviour.

CCS

Combo 1 and Combo 2, with the configured low-level paths and PLC communication.

NACS

Configured charging signal paths and PLC communication.

CHAdeMO

Technology-specific low-level signals and CAN communication.

GB/T DC

CC1/CC2, CAN and the configured interface signals.

Standards and test scope

Define the applicable EMC test requirements.

Standard and operating conditions follow the device under test.

IEC 61851-21-1

Vehicle and onboard charger

EMC requirements for vehicle-side charging units, tested in the complete vehicle or as an electronic subassembly within the applicable scope.

IEC 61851-21-2

Off-board charging equipment

EMC requirements for external EV charging systems and their applicable operating modes.

UN R10 / ECE R10

Vehicle approval context

The approval plan specifies regulatory series, annex, active charging state and required laboratory geometry.

IEC 61000-3

Harmonics and flicker

Dedicated grid and measurement equipment evaluates AC mains behaviour. EMC Link maintains the configured communication path.

Planning documents and a practical test setup

Coordinate signal paths, test equipment and the laboratory workflow.

EMC Link technical brochure · PDF, EnglishArchitecture, technology paths and setup notes.EV Charging EMC TestingDevice under test, chamber workflow and test methodology.EVCACharging simulation, measurement and system integration.comframeLogging, synchronised analysis, automation and reports.Thailand EVSE test laboratoryEMC Link in the published project context.

Selection and installation

Configure EMC Link for your test setup.

When do I need EVCA?

Use a compatible EVCA/comframe configuration to simulate the charging partner, analyse protocols, record results or automate control as required by the test. EMC Link connects the signal paths optically; the connected test system performs simulation and analysis.

What is required for chamber installation?

Plan two optical fibre cables, suitable feedthroughs and a filtered 12 V DC supply for the chamber-side unit. The laboratory defines the cable routing, filtering, external power and safety integration for the approved setup.

Are all charging technologies included in a base configuration?

MCS follows a separate product and configuration path.

More on this topic

Practical examples and further reading

Customer projects, success stories and technical articles related to this page.

Configure your test setup

Define your EMC Link configuration with these five test-setup details.

  1. DUT, standard and operating condition

    Describe the vehicle, OBC, inlet, controller, EVSE or module under test. Specify the applicable standard edition and test mode.

  2. Charging counterpart

    Choose EVSE simulation for a vehicle-side DUT or EV simulation for a charging-station-side DUT.

  3. Technology and signal scope

    Specify the connector family and the required PLC, low-level signals, CAN, Ethernet, temperature and auxiliary paths.

  4. Chamber integration

    EMC or climate chamber, fibre routing, feedthroughs, filtered 12 V supply, artificial network/AAN, harness geometry, external power and safety.

  5. Results and software

    Specify compatible test-system functions for logging, analysis, control and reporting, including EVCA/comframe where configured.

From the demo to your first test:

  1. 15-minute demo. An engineer shows a charging session over EMC Link – DUT in the chamber, simulated partner outside.
  2. Written quotation. The five setup details above, in one quotation – then you order.
  3. Delivery and start. Commissioning and training are agreed in the quotation.
Find your test systemRequest a 15-minute demo

Technical updates from comemso

Choose your newsletter topics

Receive product and software updates, testing insights and information about comemso events.

Choose my newsletter topics

Choose your topics, then confirm your subscription by email. Unsubscribe at any time.

¹ Scope

Functions, charging standards, interfaces, power ratings and Test Libraries depend on the EVCA system, the software release and your project configuration. Automated standards analysis supports, but does not replace, formal conformance testing. The quotation confirms the scope for your project.