IEC 62236-4-2018 PDF

Full title and description

Railway applications — Electromagnetic compatibility — Part 4: Emission and immunity of the signalling and telecommunications apparatus. This international standard specifies emission limits, immunity requirements and performance criteria for signalling and telecommunications (S&T) apparatus (including associated power‑supply items) installed in the railway environment to avoid interference within the railway system and to equipment outside the railway boundary.

Abstract

IEC 62236-4:2018 defines emission and immunity limits and associated performance criteria for signalling and telecommunications equipment used in railway applications. The document addresses both radiated and conducted phenomena, extends and clarifies requirements from the previous edition, and covers equipment, ports and power supplies whose emissions or susceptibility could affect other on‑railway apparatus or produce interference outside the railway system.

General information

• Status: Published (International Standard)
• Publication date: 15 February 2018
• Publisher: International Electrotechnical Commission (IEC)
• ICS / categories: 33.100 (Electromagnetic compatibility), 45.060.01 (Railway rolling stock in general)
• Edition / version: Edition 3.0 (Ed. 3.0)
• Number of pages: 36

Key bibliographic details and edition metadata are taken from the official IEC publication record for IEC 62236-4:2018.

Scope

IEC 62236-4:2018 applies to signalling and telecommunications apparatus installed inside the railway environment, including power‑supply systems belonging to S&T, where such apparatus can (a) interfere with other apparatus inside the railway environment or (b) increase total railway emissions and thereby risk causing electromagnetic interference to equipment outside the railway system. Specific application rules in the document address vital equipment (for example interlocking and command & control), apparatus located within the 3 m zone, ports of apparatus within the 10 m zone and ports with connected cable lengths greater than 30 m.

Key topics and requirements

• Defined emission limits (radiated and conducted) for S&T apparatus to control contributions to the railway environment and to limit interference outside the railway boundary.
• Immunity (referred to as performance criteria) requirements that specify how apparatus must behave under specified electromagnetic disturbances and what performance levels are acceptable.
• Test methods and measurement guidance tailored to railway installation conditions (ports, cable lengths, zones and vital equipment considerations).
• Requirements addressing both apparatus and associated power‑supply systems that form part of S&T equipment.
• Clarifications and extended requirements versus the previous edition to reduce ambiguity and broaden coverage of emission and immunity cases.

Typical use and users

Used by railway signalling and telecommunications engineers, EMC test laboratories, equipment manufacturers and system integrators when designing, testing or certifying S&T apparatus for use in rail environments. Regulators, procurement teams and installation contractors also consult this standard to verify compliance and to ensure interoperable, interference‑resilient railway installations.

Related standards

Part of the IEC 62236 series (railway EMC). Closely related documents in the series include IEC 62236-1 (General — framework and performance criteria), IEC 62236-2 (Emission of the whole railway system to the outside world), IEC 62236-3 (rolling stock parts, including 3-2 apparatus and 3-1 train/complete vehicle subparts), and IEC 62236-5 (fixed power supply installations and apparatus). Practitioners commonly use these parts together when assessing whole‑system EMC or particular subsystem boundaries.

Keywords

railway, electromagnetic compatibility, EMC, signalling, telecommunications, emission limits, immunity, performance criteria, power supply, railway zones, IEC 62236

FAQ

Q: What is this standard?

A: IEC 62236-4:2018 is an international standard that specifies emission limits and immunity/performance criteria for signalling and telecommunications apparatus used in railway environments to control internal interference and limit emissions that could affect equipment outside the railway system.

Q: What does it cover?

A: It covers radiated and conducted emission limits, immunity/performance requirements, test/measurement guidance and application rules for S&T apparatus and their power supplies—highlighting special cases such as vital equipment, devices within specified proximity zones (3 m and 10 m) and ports with long cable runs.

Q: Who typically uses it?

A: Railway signalling and telecommunications designers, equipment manufacturers, EMC test houses, system integrators, infrastructure owners and conformity assessment bodies use this standard to design, test and verify S&T equipment for safe, interoperable operation in rail environments.

Q: Is it current or superseded?

A: IEC 62236-4:2018 is the 3rd edition (published 15 February 2018) and replaced the 2008 edition. Users should check for any amendments or later editions before relying on the standard for compliance or procurement.

Q: Is it part of a series?

A: Yes — it is part of the IEC 62236 series (Railway applications — Electromagnetic compatibility). The series includes Part 1 (General), Part 2 (system emission to the outside world), Parts 3-x (rolling stock and apparatus), Part 4 (this document) and Part 5 (fixed power supply installations). These parts are intended to be used together for comprehensive railway EMC management.

Q: What are the key keywords?

A: electromagnetic compatibility, EMC, railway, signalling, telecommunications, emission limits, immunity, performance criteria, power supply, IEC 62236.