IEC 62625-2:2016

Overview

IEC 62625-2:2016 is an international standard published by the International Electrotechnical Commission (IEC) that specifies conformity testing methods for On Board Driving Data Recording Systems (ODDRS) used in electronic railway equipment. This second part of the IEC 62625 series focuses on verifying that ODDRS implementations meet the stringent functional and system requirements outlined in IEC 62625-1. It provides a comprehensive framework for conformity testing during design review, type testing, and routine testing phases to ensure reliable performance and safety of onboard driving data recorders in railway operations.

Key Topics

• Conformity Testing Methodology IEC 62625-2 details standardized test procedures and methodologies for assessing compliance of ODDRS with IEC 62625-1 requirements. It covers testing at both system and train levels, including integrated type tests of ODDRS installed on trains.

• Functional Requirements Verification The standard outlines testing for key functions such as recording train data, onboard data protection, data retrieval, and recorded data analysis. It also specifies how to verify optional functions provided by the ODDRS unit.

• System Requirements Evaluation Essential system-level criteria such as ODDRS operating modes, recording performance, environmental resilience, availability, security of records, maintainability, data survivability, and power consumption are rigorously tested. The standard defines acceptance conditions tied to these aspects.

• Implementation Conformity Statements IEC 62625-2 introduces tools including Functional Implementation Conformity Statements (FICS) and System Implementation Conformity Statements (SICS) to document and assess implementation compliance throughout the testing process.

• Test Environment and Type Test Arrangements Requirements for the test setup, including the use of equivalent signal generators and power supplies, ensure repeatability and reliability of type testing. The standard provides guidelines on how to organize integrated ODDRS testing within a train environment.

Applications

• Railway Equipment Manufacturers Companies designing and manufacturing on-board driving data recorders rely on IEC 62625-2 to validate device compliance with international standards, ensuring their products meet strict safety and performance benchmarks before market release.

• Railway Operators and Regulators Railway operators use this standard to verify onboard equipment conformity during procurement, installation, and routine maintenance phases. Regulatory bodies adopt the standard as part of certification processes for railway safety and interoperability.

• Testing Laboratories and Certification Bodies Test centers performing conformity assessments of electronic railway equipment implement IEC 62625-2 procedures to provide credible and harmonized evaluation results that support international market access.

• Safety and Quality Assurance Teams Engineering teams incorporate the IEC 62625-2 testing framework within their quality assurance processes to identify and mitigate risks associated with data recording reliability and integrity in railway systems.

Related Standards

• IEC 62625-1: On Board Driving Data Recording System – Functional and System Requirements Defines the fundamental requirements and performance specifications that IEC 62625-2 tests for conformity.

• IEC 62998: Electronic Railway Equipment – Data Communication Networks Addresses communication aspects which may interface with data recorders and impact overall system compliance.

• IEC 61508: Functional Safety of Electrical/Electronic/Programmable Electronic Safety-related Systems Provides broader principles on safety lifecycle and reliability applicable to railway equipment including ODDRS.

• EN 50155: Railway Applications – Electronic Equipment Used on Rolling Stock Sets environmental and reliability criteria relevant to onboard data recording devices.

By adhering to the IEC 62625-2:2016 standard, stakeholders in the railway sector ensure that On Board Driving Data Recording Systems are rigorously tested for conformity-contributing to enhanced operational safety, system interoperability, and data integrity in modern railway transportation.