IEC 62236-4:2018

Railway applications - Electromagnetic compatibility - Part 4: Emission and immunity of the signalling and telecommunications apparatus

IEC 62236-4:2018 specifies limits for emission and immunity and provides performance criteria for signalling and telecommunications (S&T) apparatus (including power supply systems belonging to S&T) which may interfere with other apparatus inside the railway environment, or increase the total emissions for the railway environment and so risk causing electromagnetic interference to apparatus outside the railway system. This new edition includes the following significant technical changes with respect to the previous edition: clarification of certain parts of the standard; extension of emission and immunity requirements.

Applications ferroviaires - Compatibilité électromagnétique - Partie 4: Emission et immunité des appareils de signalisation et de télécommunication

L'IEC 62236-4:2018 spécifie les limites d’émission et d’immunité et donne les critères d’aptitude à la fonction pour les appareils de signalisation et de télécommunication (S&T) (y compris les systèmes d'alimentation appartenant à S&T) qui peuvent perturber d’autres appareils dans l’environnement ferroviaire ou augmenter les émissions totales pour l’environnement ferroviaire et qui risquent ainsi d’être la cause d’un brouillage électromagnétique pour des appareils à l’extérieur du système ferroviaire. Cette nouvelle édition inclut les changements techniques significatifs suivants par rapport à l’édition précédente: clarification de certaines parties de la norme; extension des exigences d'émission et d'immunité.

General Information

• Status: Published
• Publication Date: 14-Feb-2018
• ICS: 33.100 - Electromagnetic compatibility (EMC)
• ICS: 45.060.01 - Railway rolling stock in general
• Technical Committee: TC 9 - Electrical equipment and systems for railways
• Drafting Committee: MT 62236 - TC 9/MT 62236
• Current Stage: PPUB - Publication issued
• Start Date: 15-Feb-2018
• Completion Date: 23-Feb-2018

Relations

• Revises: IEC 62236-4:2008 - Railway applications - Electromagnetic compatibility - Part 4: Emission and immunity of the signalling and telecommunications apparatus
• Effective Date: 05-Sep-2023

Overview

IEC 62236-4:2018 - Railway applications - Electromagnetic compatibility - Part 4: Emission and immunity of the signalling and telecommunications apparatus - defines EMC requirements for signalling and telecommunications (S&T) apparatus installed inside the railway environment. This product standard sets emission limits and immunity performance criteria to prevent S&T equipment (including associated power-supply systems) from causing or suffering electromagnetic interference (EMI) within rail infrastructure and beyond. The 2018 (3rd) edition clarifies scope and definitions and extends the emission and immunity frequency ranges (notably emissions up to 1–6 GHz and immunity extended to 5.1–6 GHz).

Key topics and technical requirements

• Scope of application
  • Applies to S&T apparatus fixed within the railway environment (vehicle equipment, substations are covered by other parts: IEC 62236-3-2 and IEC 62236-5).
  • Specific attention to vital equipment, apparatus inside the 3 m zone, ports within the 10 m zone with connections into the 3 m zone, and ports with cable length > 30 m.
• Emission limits
  • Limits are specified per port category (AC/DC power ports, I/O, enclosure, earth, etc.). Where IEC 61000-6-4 emission levels are met, compliance with this standard is generally achieved provided DC power port emissions also comply.
• Immunity requirements
  • Performance criteria and port-by-port immunity tests are defined (radiated and conducted RF, ESD, EFT/burst, surge, magnetic field tests, etc.).
  • Test methods reference IEC 61000-4-x series (e.g., 4-2, 4-3, 4-4, 4-5, 4-6, 4-8) and CISPR measurement standards.
• Frequency coverage
  • The standard considers DC to 400 GHz but specifies tests only where requirements are given. Emission and immunity extensions in the GHz bands are a notable update.
• Exclusions & notes
  • Intentional radio transmitters (e.g., transponders) are not subject to the standard’s radiated limits at their communication frequencies. Safety and fault conditions are outside the scope.

Practical applications - who uses it

• Railway signalling and telecom equipment manufacturers - design and verify EMC compliance during product development.
• System integrators and railway operators - ensure interoperability and robust operation of interlocking, C&C, and communication systems.
• EMC test laboratories and certification bodies - perform port-specific emission and immunity testing against IEC 62236-4:2018 criteria.
• Regulators and procurement teams - reference standard when specifying acceptance criteria for S&T apparatus.

Related standards

• IEC 62236-1 (general EMC provisions for railways)
• IEC 62236-3-2 (rolling stock apparatus)
• IEC 62236-5 (substation-related apparatus)
• IEC 61000-6-2 / IEC 61000-6-4 (generic immunity/emission for industrial environments)
• IEC 61000-4-x series and CISPR 16 (test methods and measurement techniques)

Keywords: IEC 62236-4:2018, railway electromagnetic compatibility, EMC for signalling and telecommunications, emission limits, immunity requirements, S&T apparatus, railway EMC testing.

Standards Content (Sample)

IEC 62236-4 ®
Edition 3.0 2018-02
REDLINE VERSION
INTERNATIONAL
STANDARD
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Railway applications – Electromagnetic compatibility –
Part 4: Emission and immunity of the signalling and telecommunications
apparatus
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IEC 62236-4 ®
Edition 3.0 2018-02
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Railway applications – Electromagnetic compatibility –

Part 4: Emission and immunity of the signalling and telecommunications

apparatus
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.100; 45.060.01 ISBN 978-2-8322-5407-3

– 2 – IEC 62236-4:2018 RLV  IEC 2018
CONTENTS
FOREWORD . 3
INTRODUCTION . 2
1 Scope . 6
2 Normative references . 7
3 Terms, definitions and abbreviated terms . 7
3.1 Terms and definitions . 8
3.2 Abbreviated terms . 9
4 Description of location . 8
5 Emission limits for apparatus . 9
6 Immunity. 11
6.1 Performance criteria . 11
6.2 Test Immunity requirements . 11
Bibliography . 20

Figure 1 – Main categories of ports . 8

Table 1 – Emission – AC or DC power ports (input and output) . 10
Table 2 – Immunity – Enclosure port . 12
Table 3 – Immunity – I/O port . 16
Table 4 – Immunity – DC power ports . 17
Table 5 – Immunity – AC power ports . 18
Table 6 – Immunity – Earth port . 19

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
RAILWAY APPLICATIONS –
ELECTROMAGNETIC COMPATIBILITY –

Part 4: Emission and immunity of the signalling
and telecommunications apparatus

FOREWORD
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– 4 – IEC 62236-4:2018 RLV  IEC 2018
International Standard IEC 62236-4 has been prepared by IEC technical committee TC 9:
Electrical equipment and systems for railways.
This third edition cancels and replaces the second edition, issued in 2008. It constitutes a
technical revision and has been developed on the basis of EN 50121-4:2015.
This edition includes the following significant technical changes with respect to the previous
edition:
a) clarification of scope (Clause 1);
b) new definition (Clause 3);
c) emission requirement extended in the frequency range 1 GHz to 6 GHz following
IEC 61000-6-4;
d) immunity requirement extended in the frequency range 5,1 GHz to 6 GHz.
This International Standard is to be read in conjunction with IEC 62236-1.
The text of this International Standard is based on the following documents:
FDIS Report on voting
9/2339/FDIS 9/2369/RVD
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 62236 series, published under the general title Railway
applications – Electromagnetic compatibility, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The “colour inside” logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct understanding
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INTRODUCTION
This part of IEC 62236 has been prepared in the form of a Product Standard.
It defines the immunity and emission test requirements for apparatus defined in the scope in
relation to the electromagnetic disturbances likely to be experienced in the railway. In
particular, the test requirements represent the essential electromagnetic immunity
requirements and have been selected to ensure an adequate level of immunity for apparatus
installed in on the railway locations.
Test requirements are specified for each port considered.
Safety considerations are not covered by this document.
In special specific situations, where the level of disturbances may exceed the levels
considered in this document, e.g. at a special location or where a hand-held transmitter is
used in very close proximity to an apparatus, special mitigation measures may have to be
necessary employed.
– 6 – IEC 62236-4:2018 RLV  IEC 2018
RAILWAY APPLICATIONS –
ELECTROMAGNETIC COMPATIBILITY –

Part 4: Emission and immunity of the signalling
and telecommunications apparatus

1 Scope
This part of IEC 62236 applies to signalling and telecommunication apparatus that is installed
inside the railway environment. Signalling and telecommunication apparatus mounted in
vehicles is covered by IEC 62236-3-2:2018, signalling and telecommunication apparatus
installed inside the substation and connected to substation equipment is covered by
IEC 62236-5:2018.
This document specifies limits for emission and immunity and provides performance criteria
for signalling and telecommunications (S&T) apparatus (including power supply systems
belonging to S&T) which may interfere with other apparatus inside the railway environment, or
increase the total emissions for the railway environment beyond the limits defined in the
appropriate standard and so risk causing Electromagnetic Interference (EMI) to apparatus
outside the railway system.
Apparatus which complies with the emission levels of IEC 61000-6-4 will meet the emission
requirements of this standard provided that emissions from any d.c. power port are within the
emissions limits specified for a.c. power ports. The immunity levels of IEC 61000-6-2 will also
be adequate except for the special case of apparatus as defined in Note 1 of Table 1. This
standard provides the immunity requirements for such apparatus.
The immunity levels given for the apparatus will in most cases allow the apparatus to perform
as intended in the railway environment (see Note). The immunity level establishes a common
reference for evaluating the performance of the apparatus when subject to interference
resulting from direct exposure of the apparatus and associated cables to a radio frequency
field, or by coupling of the interference from a remote source.
The requirements specified in this document apply for:
– vital equipment such as interlocking or command and control,
– apparatus inside the 3 m zone,
– ports of apparatus inside the 10 m zone with connection inside the 3 m zone,
– ports of apparatus inside the 10 m zone with cable length > 30 m.
Other apparatus not covered by at least one of these given cases is in compliance with
IEC 61000-6-2.
If a port is intended to transmit or receive for the purpose of radio communication (intentional
radiators, e.g. transponder systems), then the radiated emission and immunity limits in this
standard at the communication frequency do not apply requirements in this document are not
intended to be applicable to the intentional transmission from a radio-transmitter as defined
by the ITU.
Immunity limits do not apply in the exclusion bands as defined in the corresponding EMC
related standard for radio equipment.
This document does not specify basic personal safety requirements for apparatus such as
protection against electric shock, unsafe operation, insulation co-ordination and related

dielectric tests. The requirements were developed for and are applicable to this set of
apparatus when operating under normal conditions. Fault conditions of the apparatus have
not been taken into account.
The requirements and test methods also apply to telecommunications and signalling data and
power lines connected to the equipment under test (EUT).
The frequency range considered is from DC to 400 GHz. No measurements need to be
performed at frequencies where no requirement is specified.
For products in the scope of IEC 61000-3-2, IEC 61000-3-3, IEC 61000-3-11 or
IEC 61000-3-12, the requirements of those standards also apply.
Testing methods are given in the basic standards listed in Clause 2.
These specific provisions are to be used in conjunction with the general provisions in
IEC 62236-1.
NOTE The immunity and emission levels do not of themselves guarantee that the integration
of apparatus will necessarily be satisfactory. The document cannot cover all the possible
configurations of the apparatus, but the test levels are sufficient to achieve satisfactory EMC
in the majority of cases.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their
content constitutes requirements of this document. For dated references, only the edition
cited applies. For undated references, the latest edition of the referenced document (including
any amendments) applies.
IEC 61000-3-2, Electromagnetic compatibility (EMC) – Part 3-2: Limits – Limits for harmonic
current emissions (equipment input current up to and including 16 A per phase)
IEC 61000-3-3, Electromagnetic compatibility (EMC) – Part 3-3: Limits – Limitation of voltage
changes, voltage fluctuations and flicker in public low-voltage supply systems, for equipment
with rated current ≤ 16 A per phase and not subject to conditional connection
IEC 61000-4-2:2008, Electromagnetic compatibility (EMC) – Part 4-2: Testing and
measurement techniques – Electrostatic discharge immunity test
IEC 61000-4-3:2006, Electromagnetic compatibility (EMC) – Part 4-3: Testing and
measurement techniques – Radiated, radio-frequency, electromagnetic field immunity test
IEC 61000-4-4:2012, Electromagnetic compatibility (EMC) – Part 4-4: Testing and
measurement techniques – Electrical fast transient/burst immunity test
IEC 61000-4-5:2014, Electromagnetic compatibility (EMC) – Part 4-5: Testing and
measurement techniques – Surge immunity test
IEC 61000-4-6:2013, Electromagnetic compatibility (EMC) – Part 4-6: Testing and
measurement techniques – Immunity to conducted disturbances, induced by radio-frequency
fields
IEC 61000-4-8:2009, Electromagnetic compatibility (EMC) – Part 4-8: Testing and
measurement techniques – Power frequency magnetic field immunity test

– 8 – IEC 62236-4:2018 RLV  IEC 2018
IEC 61000-4-9, Electromagnetic compatibility (EMC) – Part 4-9: Testing and measurement
techniques – Pulse magnetic field immunity test
IEC 61000-6-2:2016, Electromagnetic compatibility (EMC) – Part 6-2: Generic standards –
Immunity standard for industrial environments
IEC 61000-6-4:2006, Electromagnetic compatibility (EMC) – Part 6-4: Generic standards –
Emission standard for industrial environments
IEC 61000-6-4:2006/AMD1:2010
IEC 62236-1:2018, Railway applications – Electromagnetic compatibility – Part 1: General
IEC 62236-3-2, Railway applications – Electromagnetic compatibility – Part 3-2: Rolling stock
– Apparatus
CISPR 16-2-1:2014, Specification for radio disturbance and immunity measuring apparatus
and methods – Part 2-1: Methods of measurement of disturbances and immunity – Conducted
disturbance measurements
3 Terms, definitions and abbreviated terms
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1.1
port
particular interface of the specified apparatus an equipment which couples this equipment
with the external electromagnetic environment (161-01-01) and through which the equipment
is influenced by this environment
EXAMPLE AC power port, DC power port, I/O (input/output) port, earth port.
Note 1 to entry: The main categories of ports for signaling and telecommunication apparatus are presented in
Figure 1.
[SOURCE: IEC 60050-161:1990, AMD4:2014, 161-01-27, modified]

Enclosure port
AC power port  I/O port
DC power port APPARATUS earth port

IEC
Figure 1 – Main categories of ports

3.1.2
enclosure port
physical boundary of the apparatus through which electromagnetic fields may radiate or
impinge (see Figure 1)
3.1.3
3 m zone
area along the railway line within a distance of 3 m from the centerline of the nearest track at
both sides of the track
3.1.4
10 m zone
area along the railway line within a distance of 10 m from the centerline of the nearest track at
both sides of the track
3.2 Abbreviated terms
AC Alternating current
AM Amplitude modulation
DC Direct current
EMC Electromagnetic compatibility
EMI Electromagnetic interference
I/O Input / Output
ITU International Telecommunication Union
r.m.s. Root mean square
S&T Signalling and telecommunication
4 Description of location
The railway environment is characterized as described in IEC 62236-1:2018. Special
consideration is given in this standard to apparatus intended to be installed within 3 m of the
centreline of the nearest track and as defined in Note 1 of Table 1.
NOTE Tests covering compatibility with specific items of signalling equipment may be required.
5 Emission limits for apparatus
Apparatus which complies with the radiated and conducted emission levels of IEC 61000-6-4
is deemed to meet the emission requirements of this document, provided that the conducted
emissions from any DC power port are within the emissions limits specified for AC power
ports.
The maximum emissions permitted by IEC 61000-6-4 limits defined in Table 1 shall be
complied with. The conducted emission limits shall apply to both AC and DC power ports. A
measurement distance of 10 m may be used with the limits increased by 10 dB for the
radiated emission of the enclosure port. Where the apparatus is intended to be used in an
environment other than the railway environment, then the emission limits given in the
appropriate standards shall apply.
If the field-strength measurement at 10 m or 30 m cannot be made because of high ambient
noise levels, or for other reasons, measurements may be made at a closer distance, for
example 3 m. An inverse proportionality factor of 20 dB per decade should be used to
normalize the measured data to the specified distance for determining compliance. Care
should be taken in the measurement of large EUTs at 3 m at frequencies near 30 MHz, due to
the near field effects.
– 10 – IEC 62236-4:2018 RLV  IEC 2018

Table 1 – Emission – AC or DC power ports (input and output)
Test Basic Applicability
Port Test set-up Remarks
specification Standard note
a
AC or DC power ports 150 kHz to 500 kHz 79 dBμV quasi- CISPR 16-2-1 CISPR 16-2-1 See
1.1
peak
66 dBµV average
500 kHz to 30 MHz 73 dBμV quasi-
peak
60 dBµV average
a
Impulse noise (clicks) which occurs less than five times per minute is not considered. For clicks appearing more often than 30 times per minute, the limits apply.
For clicks appearing between 5 and 30 times per minute, a relaxation of the limits is allowed of 20 log 30/N dB (where N is the number of clicks per minute). Criteria for
separated clicks may be found in CISPR 14-1.

6 Immunity
6.1 Performance criteria
It is impossible to define precise criteria for the evaluation of the apparatus within the scope
of this standard, but performance criteria are as specified in IEC 62236-1, unless otherwise
stated.
The variety and diversity of the apparatus within the scope of this document makes it difficult
to define precise criteria for the evaluation of the immunity test results. Three general levels
of performance are therefore used, as defined in IEC 62236-1.
6.2 Test Immunity requirements
The immunity requirements for apparatus covered by this document are given on a port by
port basis.
Test requirements are specified for each port considered.
Tests shall be conducted in a well-defined and reproducible manner. The tests shall be
carried out as single tests in sequence. The sequence of testing is optional. The description
of the test, the test generator, the test methods and the test set-up are given in the basic
standards referred to in Tables 2 to 6.
If the apparatus has a large number of similar ports or ports with many similar connections,
then a sufficient number shall be selected to simulate actual operating conditions and to
ensure that all the different types of termination are covered (e.g. 20 % of the ports or at least
four ports).
The immunity levels given for the apparatus will in most cases allow the apparatus to perform
as intended inside the railway environment. The immunity level establishes a common
reference for evaluating the performance of the apparatus when subject to interference
resulting from direct exposure of the apparatus and associated cables to a radio frequency
field, or by coupling of the interference from a remote source.
The contents of the basic standards are not repeated herein; however, additional information
needed for the practical application of the tests is given where appropriate.
Voltages induced by traction currents are not treated herein. They have to be covered by the
functional specification.
– 12 – IEC 62236-4:2018 RLV  IEC 2018

Table 2 – Immunity – Enclosure port
Environmental Test Basic
Test set-up Remarks Performance criteria
phenomena specification standard
Radio-frequency
1.1 80 MHz - 1 000 MHz IEC 61000-4-3 IEC 61000-4-3 The test level specified is
electromagnetic field. the r.m.s. value of the
10 V/m (r.m.s) Unmodulated carrier A
Amplitude modulated unmodulated carrier
80 % AM, 1 kHz
1.2 Radio-frequency 800 MHz - 1 000 MHz
electromagnetic field,
20 V/m (r.m.s) Unmodulated carrier
from digital mobile
telephones
80 % AM, 1 kHz
1 400 MHz -
See Notes 1 and 3
2 100 MHz
Unmodulated carrier
The test level specified is
10 V/m (r.m.s) IEC 61000-4-3 IEC 61000-4-3 A

the r.m.s. value of the
80 % AM, 1 kHz
unmodulated carrier
2 100 MHz -
2 500 MHz
Unmodulated carrier
5 V/m (r.m.s)
80 % AM, 1 kHz
1.3 Power - frequency 16,7 Hz, 50/60 Hz a.c. systems  See Notes 1 and 2
magnetic field
100 A/m (r.m.s) IEC 61000-4-8 IEC 61000-4-8 All frequencies have to be
tested
A
0 Hz d.c. systems See Notes 1 and 2
300 A/m
1.4 Electrostatic discharge Contact discharge IEC 61000-4-2 IEC 61000-4-2 See Note 4
± 6 kV
B
Air discharge
± 8 kV
1.5 Pulsed magnetic field 300 A/m IEC 61000-4-9 IEC 61000-4-9 See Note 1 B
NOTE 1 The tests given apply to apparatus inside 3 m – zone and vital equipment such as interlocking or command and control which are mounted in areas where a high risk of
interference from mobile radio telephones has been identified. For other apparatus within the railway environment, requirements of IEC 61000-6-2 apply.
NOTE 2 Test only applies to apparatus containing devices sensitive to magnetic fields, for example Hall elements, electro-dynamic microphones, etc. Unshielded CRT displays
can exhibit interference effects above 1 A/m (r.m.s.).

NOTE 3 The test in 5.2 of IEC 61000-4-3 should be applied at the digital radio telephone frequencies in use in the countries in which the equipment is intended to be operated.
NOTE 4 Only applicable to equipment accessible to members of the public and operational staff (not maintenance).

– 14 – IEC 62236-4:2018 RLV  IEC 2018

Environmental Test Basic Applicability Performance
Test set-up Remarks
phenomena specification Standard note criteria
2.1 Radio-frequency 80 MHz to 800 MHz IEC 61000-4-3 IEC 61000-4-3  The test level
electromagnetic field. specified is the
10 V/m (r.m.s.) Unmodulated carrier
Amplitude modulated r.m.s. value of A
the unmodulated
80 % AM, 1 kHz
carrier
2.2 Radio-frequency 800 MHz to
electromagnetic field
1 000 MHz
20 V/m (r.m.s.) Unmodulated carrier
80 % AM, 1 kHz
The test level
1 400 MHz to
specified is the
2 000 MHz
r.m.s. value of
the unmodulated
10 V/m (r.m.s.) Unmodulated carrier
carrier
80 % AM, 1 kHz
These tests are
IEC 61000-4-3 IEC 61000-4-3  A
2 000 MHz to intended to
2 700 MHz simulate
disturbances
5 V/m (r.m.s.) Unmodulated carrier
from digital
communication
80 % AM, 1 kHz
devices
5 100 MHz to
6 000 MHz
3 V/m (r.m.s.) Unmodulated carrier
80 % AM, 1 kHz
a
Power – frequency
2.3 16,7 Hz  IEC 61000-4-8 IEC 61000-4-8 See Tests only for
magnetic field applicable
100 A/m
frequencies
Testing time
50 Hz / 60 Hz
A
is ≥ 10s
100 A/m
0 Hz
300 A/m
b
Electrostatic
2.4 ± 6 kV Contact discharge IEC 61000-4-2 IEC 61000-4-2 See
B
discharge
± 8 kV Air discharge
Environmental Test Basic Applicability Performance
Test set-up Remarks
phenomena specification Standard note criteria
a
Test only applies to apparatus containing devices sensitive to magnetic fields, e.g. Hall elements, electro-dynamic microphones, etc. Unshielded CRT displays can exhibit
interference effects above 1 A/m (r.m.s.). Equipment mounted directly on the running rails is not covered, as higher field strength may occur.
b
Only applicable to equipment accessible to members of the public and operational staff (not maintenance), otherwise levels specified in IEC 61000-6-2 apply.

– 16 – IEC 62236-4:2018 RLV  IEC 2018

Table 3 – Immunity – I/O port
Environmental Test Basic Applicability Performance
Test set-up Remarks
phenomena specification Standard note criteria
a, b, e
3.1 Radio-frequency 0,15 MHz to IEC 61000-4-6 IEC 61000-4-6 See The test level
common mode 80 MHz specified is the
r.m.s. value of the
A
10 V (r.m.s.) Unmodulated carrier
unmodulated
carrier
80 % AM, 1 kHz
e
3.2 Fast transients ±2 kV Peak IEC 61000-4-4 IEC 61000-4-4 See Capacitive clamp
used
T / T A
5/50 ns
r h
5 kHz Repetition frequency
c, d, e
3.3 Surges 1,2 / 50 µs IEC 61000-4-5 IEC 61000-4-5 See All severity levels
below the given
± 2 kV Open circuit test voltage,
severity level
line to earth
have to be tested
with 5 pulses for
± 1 kV Open circuit test voltage,
each severity
line to line
level and a test B
sequence not
alternating, but
starting with one
polarity followed
by the other
polarity.
a
Applicable only to ports interfacing with cables whose total length according to the manufacturer’s specification may exceed 3 m.
b
The test level can also be defined as the equivalent current into a 150 Ω load.
c
An output impedance of 42 Ω (40 Ω and 2 Ω generator) and a coupling capacitance of 0,5 µF are specified.
d
For telecommunication ports and other ports intended for connection to highly balanced pairs, a line to line test is not required.
e
Ports directly connected to power ports or to the (public) low voltage network are classified as power ports also.
NOTE This test applies to I/O port connected to cable inside 3 m - boundary or connected to cable longer than 30 m within 10 m boundary. I/O ports connected to cable other
than above should comply with the requirements of IEC 61000-6-2 except that Note 2 of Table 3 of IEC 61000-6-2 is not applicable.
NOTE This test is intended to replicate the phenomenon known as direct coupling; hence an output impedance of 42 Ω (40 Ω and 2 Ω generator) and a coupling capacitance of
0,5 µF are recommended.
Table 4 – Immunity – DC power ports
Environmental Test Basic Applicability Performance
Test set-up Remarks
phenomena specification Standard note criteria

a
Radio-frequency
4.1 0,15 MHz to IEC 61000-4-6 IEC 61000-4-6 See The test level
common mode 80 MHz specified is the
r.m.s. value of the
A
10 V (r.m.s.) Unmodulated carrier
unmodulated carrier
80 % AM, 1 kHz
Fast transients
4.2 ± 2 kV Peak IEC 61000-4-4 IEC 61000-4-4
5/50 ns T / T A
r h
5 kHz Repetition frequency
b
4.3 Surges 1,2 / 50 µs IEC 61000-4-5 IEC 61000-4-5 See All severity levels
below the given
± 2 kV Open circuit test
severity level have to
voltage, line to earth
be tested with 5
pulses for each
± 1 kV Open circuit test
severity level and a B
voltage, line to line
test sequence not
alternating, but
starting with one
polarity followed by
the other polarity.
a
The test level can also be defined as the equivalent current into a 150 Ω load.
b
When the power supply is isolated from earth, an output impedance of 42 Ω (40 Ω and 2 Ω generator) and a coupling capacitance of 0,5 µF are recommended.
NOTE This test is intended to replicate the phenomena known as direct coupling. When the power supply is isolated from earth, an output impedance of 42 Ω (40 Ω and 2 Ω
generator) and a coupling capacitance of 0,5 µF are recommended. When the power supply is not isolated from earth, an output impedance of 12 Ω (10 Ω and 2 Ω generator)
and a coupling capacitance of 9 µF are recommended. These requirements are for cable-length above 30 m.

– 18 – IEC 62236-4:2018 RLV  IEC 2018

Table 5 – Immunity – AC power ports
Environmental Test Basic Applicability Performance
Test set-up Remarks
phenomena specification Standard note criteria

a
5.1 Radio-frequency 0,15 MHz to IEC 61000-4-6 IEC 61000-4-6 See The test level
common mode 80 MHz specified is the
r.m.s. value of
A
10 V (r.m.s.) Unmodulated carrier
the unmodulated
carrier
80 % AM, 1 kHz
5.2 Fast transients ± 2 kV Peak IEC 61000-4-4 IEC 61000-4-4
T / T A
5/50 ns
r h
5 kHz Repetition frequency
5.3 Surges 1,2 / 50 µs IEC 61000-4-5 IEC 61000-4-5  All severity
levels below the
± 2 kV Open circuit test
given severity
voltage, line to earth
level have to be
tested with 5
± 1 kV Open circuit test
pulses for each
voltage, line to line
severity level
B
and a test
sequence not
alternating, but
starting with one
polarity followed
by the other
polarity.
a
The test level can also be defined as the equivalent current into a 150 Ω load.
NOTE This test is intended to replicate the phenomena known as direct coupling; hence an output impedance of 12 Ω (10 Ω and 2 Ω generator) and a coupling capacitance of 9
µF are recommended.
Table 6 – Immunity – Earth port
Environmental Test Applicability Performance
Basic Standard Test set-up Remarks
phenomena specification note criteria
6.1 Radio-frequency 0,15 MHz to IEC 61000-4-6 IEC 61000-4-6  The test level
common mode 80 MHz specified is the
r.m.s value of the
A
10 V (r.m.s.) Unmodulated carrier
u.nmodulated
carrier
80 % AM, 1 kHz
6.2 Fast transients ±1 kV Peak IEC 61000-4-4 IEC 61000-4-4
T / T A
5/50 ns
r h
5 kHz Rep. frequency
NOTE The test may not be practicable with a cable length of less than 3 m.
NOTE The test level can also be defined as the equivalent current into a 150 Ω load.

– 20 – IEC 62236-4:2018 RLV  IEC 2018
Bibliography
Other standards which are relevant to the EMC behaviour of apparatus used in railway
substations are listed below. Where limits are in conflict, those contained within this standard
take precedence.
IEC 61000-3-2:2014, Electromagnetic compatibility (EMC) – Part 3-2: Limits – Limits for
harmonic current emissions (equipment input current up to and including 16 A per phase)
IEC 61000-3-3:2013, Electromagnetic compatibility (EMC) – Part 3-3: Limits – Limitation of
voltage changes, voltage fluctuations and flicker in public low-voltage supply systems, for
equipment with rated current ≤ 16 A per phase and not subject to conditional connection
IEC 61000-3-11:2017, Electromagnetic compatibility (EMC) – Part 3-11: Limits; Limitation of
voltage changes, voltage fluctuations and flicker in public low-voltage supply systems –
Equipment with rated current ≤75 A and subject to conditional connection
IEC 61000-3-12:2011, Electromagnetic compatibility (EMC) – Part 3-12: Limits – Limits for
harmonic currents produced by equipment connected to public low-voltage systems with input
current > 16 A and ≤75 A per phase
IEC 62236-3-2:2018, Railway applications – Electromagnetic compatibility – Part 3-2: Rolling
stock – Apparatus
IEC 61000-4-1, Electromagnetic compatibility (EMC) – Part 4-1: Testing and measurement
techniques – Overview of IEC 61000-4 series
CISPR 14-1, Electromagnetic compatibility – Requirements for household appliances, electric
tools and similar apparatus – Part 1: Emission

___________
IEC 62236-4 ®
Edition 3.0 2018-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Railway applications – Electromagnetic compatibility –
Part 4: Emission and immunity of the signalling and telecommunications
apparatus
Applications ferroviaires – Compatibilité électromagnétique –
Partie 4: Émission et immunité des appareils de signalisation et de
télécommunication
– 2 – IEC 62236-4:2018  IEC 2018
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 7
3 Terms, definitions and abbreviated terms . 7
3.1 Terms and definitions . 7
3.2 Abbreviated terms . 8
4 Description of location . 8
5 Emission limits for apparatus . 9
6 Immunity. 11
6.1 Performance criteria . 11
6.2 Immunity requirements . 11
Bibliography . 18

Figure 1 – Main categories of ports . 8

Table 1 – Emission – AC or DC power ports (input and output) . 10
Table 2 – Immunity – Enclosure port . 12
Table 3 – Immunity – I/O port . 14
Table 4 – Immunity – DC power ports . 15
Table 5 – Immunity – AC power ports . 16
Table 6 – Immunity – Earth port . 17

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
RAILWAY APPLICATIONS –
ELECTROMAGNETIC COMPATIBILITY –

Part 4: Emission and immunity of the signalling
and telecommunications apparatus

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 62236-4 has been prepared by IEC technical committee TC 9:
Electrical equipment and systems for railways.
This third edit
...

IEC 62236-4 ®
Edition 3.0 2018-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Railway applications – Electromagnetic compatibility –
Part 4: Emission and immunity of the signalling and telecommunications
apparatus
Applications ferroviaires – Compatibilité électromagnétique –
Partie 4: Émission et immunité des appareils de signalisation et de
télécommunication
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IEC 62236-4 ®
Edition 3.0 2018-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Railway applications – Electromagnetic compatibility –

Part 4: Emission and immunity of the signalling and telecommunications

apparatus
Applications ferroviaires – Compatibilité électromagnétique –

Partie 4: Émission et immunité des appareils de signalisation et de

télécommunication
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 33.100; 45.060.01 ISBN 978-2-8322-5310-6

– 2 – IEC 62236-4:2018  IEC 2018
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 7
3 Terms, definitions and abbreviated terms . 7
3.1 Terms and definitions . 7
3.2 Abbreviated terms . 8
4 Description of location . 8
5 Emission limits for apparatus . 9
6 Immunity. 11
6.1 Performance criteria . 11
6.2 Immunity requirements . 11
Bibliography . 18

Figure 1 – Main categories of ports . 8

Table 1 – Emission – AC or DC power ports (input and output) . 10
Table 2 – Immunity – Enclosure port . 12
Table 3 – Immunity – I/O port . 14
Table 4 – Immunity – DC power ports . 15
Table 5 – Immunity – AC power ports . 16
Table 6 – Immunity – Earth port . 17

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
RAILWAY APPLICATIONS –
ELECTROMAGNETIC COMPATIBILITY –

Part 4: Emission and immunity of the signalling
and telecommunications apparatus

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 62236-4 has been prepared by IEC technical committee TC 9:
Electrical equipment and systems for railways.
This third edition cancels and replaces the second edition, issued in 2008. It constitutes a
technical revision and has been developed on the basis of EN 50121-4:2015.
This edition includes the following significant technical changes with respect to the previous
edition:
a) clarification of scope (Clause 1);
b) new definition (Clause 3);
c) emission requirement extended in the frequency range 1 GHz to 6 GHz following
IEC 61000-6-4;
– 4 – IEC 62236-4:2018  IEC 2018
d) immunity requirement extended in the frequency range 5,1 GHz to 6 GHz.
This International Standard is to be read in conjunction with IEC 62236-1.
The text of this International Standard is based on the following documents:
FDIS Report on voting
9/2339/FDIS 9/2369/RVD
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 62236 series, published under the general title Railway
applications – Electromagnetic compatibility, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
INTRODUCTION
This part of IEC 62236 has been prepared in the form of a Product Standard.
It defines the immunity and emission test requirements for apparatus defined in the scope in
relation to the electromagnetic disturbances likely to be experienced in the railway. In
particular, the test requirements represent the essential electromagnetic immunity
requirements and have been selected to ensure an adequate level of immunity for apparatus
installed on the railway locations.
Test requirements are specified for each port considered.
Safety considerations are not covered by this document.
In specific situations, where the level of disturbances may exceed the levels considered in
this document, e.g. at a special location or where a hand-held transmitter is used in very
close proximity to an apparatus, special mitigation measures may have to be employed.

– 6 – IEC 62236-4:2018  IEC 2018
RAILWAY APPLICATIONS –
ELECTROMAGNETIC COMPATIBILITY –

Part 4: Emission and immunity of the signalling
and telecommunications apparatus

1 Scope
This part of IEC 62236 applies to signalling and telecommunication apparatus that is installed
inside the railway environment. Signalling and telecommunication apparatus mounted in
vehicles is covered by IEC 62236-3-2:2018, signalling and telecommunication apparatus
installed inside the substation and connected to substation equipment is covered by
IEC 62236-5:2018.
This document specifies limits for emission and immunity and provides performance criteria
for signalling and telecommunications (S&T) apparatus (including power supply systems
belonging to S&T) which may interfere with other apparatus inside the railway environment, or
increase the total emissions for the railway environment and so risk causing Electromagnetic
Interference (EMI) to apparatus outside the railway system.
The requirements specified in this document apply for:
– vital equipment such as interlocking or command and control,
– apparatus inside the 3 m zone,
– ports of apparatus inside the 10 m zone with connection inside the 3 m zone,
– ports of apparatus inside the 10 m zone with cable length > 30 m.
Other apparatus not covered by at least one of these given cases is in compliance with
IEC 61000-6-2.
If a port is intended to transmit or receive for the purpose of radio communication (intentional
radiators, e.g. transponder systems), then the radiated emission requirements in this
document are not intended to be applicable to the intentional transmission from a radio-
transmitter as defined by the ITU.
Immunity limits do not apply in the exclusion bands as defined in the corresponding EMC
related standard for radio equipment.
This document does not specify basic personal safety requirements for apparatus such as
protection against electric shock, unsafe operation, insulation co-ordination and related
dielectric tests. The requirements were developed for and are applicable to this set of
apparatus when operating under normal conditions. Fault conditions of the apparatus have
not been taken into account.
The frequency range considered is from DC to 400 GHz. No measurements need to be
performed at frequencies where no requirement is specified.
For products in the scope of IEC 61000-3-2, IEC 61000-3-3, IEC 61000-3-11 or
IEC 61000-3-12, the requirements of those standards also apply.
These specific provisions are used in conjunction with the general provisions in IEC 62236-1.

The immunity and emission levels do not of themselves guarantee that the integration of
apparatus will necessarily be satisfactory. The document cannot cover all the possible
configurations of the apparatus, but the test levels are sufficient to achieve satisfactory EMC
in the majority of cases.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their
content constitutes requirements of this document. For dated references, only the edition
cited applies. For undated references, the latest edition of the referenced document (including
any amendments) applies.
IEC 61000-4-2:2008, Electromagnetic compatibility (EMC) – Part 4-2: Testing and
measurement techniques – Electrostatic discharge immunity test
IEC 61000-4-3:2006, Electromagnetic compatibility (EMC) – Part 4-3: Testing and
measurement techniques – Radiated, radio-frequency, electromagnetic field immunity test
IEC 61000-4-4:2012, Electromagnetic compatibility (EMC) – Part 4-4: Testing and
measurement techniques – Electrical fast transient/burst immunity test
IEC 61000-4-5:2014, Electromagnetic compatibility (EMC) – Part 4-5: Testing and
measurement techniques – Surge immunity test
IEC 61000-4-6:2013, Electromagnetic compatibility (EMC) – Part 4-6: Testing and
measurement techniques – Immunity to conducted disturbances, induced by radio-frequency
fields
IEC 61000-4-8:2009, Electromagnetic compatibility (EMC) – Part 4-8: Testing and
measurement techniques – Power frequency magnetic field immunity test
IEC 61000-6-2:2016, Electromagnetic compatibility (EMC) – Part 6-2: Generic standards –
Immunity standard for industrial environments
IEC 61000-6-4:2006, Electromagnetic compatibility (EMC) – Part 6-4: Generic standards –
Emission standard for industrial environments
IEC 61000-6-4:2006/AMD1:2010
IEC 62236-1:2018, Railway applications – Electromagnetic compatibility – Part 1: General
CISPR 16-2-1:2014, Specification for radio disturbance and immunity measuring apparatus
and methods – Part 2-1: Methods of measurement of disturbances and immunity – Conducted
disturbance measurements
3 Terms, definitions and abbreviated terms
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp

– 8 – IEC 62236-4:2018  IEC 2018
3.1.1
port
particular interface of an equipment which couples this equipment with the external
electromagnetic environment (161-01-01) and through which the equipment is influenced by
this environment
EXAMPLE AC power port, DC power port, I/O (input/output) port, earth port.
Note 1 to entry: The main categories of ports for signaling and telecommunication apparatus are presented in
Figure 1.
[SOURCE: IEC 60050-161:1990, AMD4:2014, 161-01-27, modified]
Enclosure port
AC power port  I/O port
DC power port APPARATUS earth port

IEC
Figure 1 – Main categories of ports
3.1.2
enclosure port
physical boundary of the apparatus through which electromagnetic fields may radiate or
impinge
3.1.3
3 m zone
area along the railway line within a distance of 3 m from the centerline of the nearest track at
both sides of the track
3.1.4
10 m zone
area along the railway line within a distance of 10 m from the centerline of the nearest track at
both sides of the track
3.2 Abbreviated terms
AC Alternating current
AM Amplitude modulation
DC Direct current
EMC Electromagnetic compatibility
EMI Electromagnetic interference
I/O Input / Output
ITU International Telecommunication Union
r.m.s. Root mean square
S&T Signalling and telecommunication

4 Description of location
The railway environment is characterized as described in IEC 62236-1:2018.

5 Emission limits for apparatus
Apparatus which complies with the radiated and conducted emission levels of IEC 61000-6-4
is deemed to meet the emission requirements of this document, provided that the conducted
emissions from any DC power port are within the emissions limits specified for AC power
ports.
The emissions limits defined in Table 1 shall be complied with. The conducted emission limits
shall apply to both AC and DC power ports. Where the apparatus is intended to be used in an
environment other than the railway environment, then the emission limits given in the
appropriate standards shall apply.

– 10 – IEC 62236-4:2018  IEC 2018

Table 1 – Emission – AC or DC power ports (input and output)
Test Basic Applicability
Port Test set-up Remarks
specification Standard note
a
AC or DC power ports 150 kHz to 500 kHz 79 dBμV quasi- CISPR 16-2-1 CISPR 16-2-1 See
1.1
peak
66 dBµV average
500 kHz to 30 MHz 73 dBμV quasi-
peak
60 dBµV average
a
Impulse noise (clicks) which occurs less than five times per minute is not considered. For clicks appearing more often than 30 times per minute, the limits apply.
For clicks appearing between 5 and 30 times per minute, a relaxation of the limits is allowed of 20 log 30/N dB (where N is the number of clicks per minute). Criteria for
separated clicks may be found in CISPR 14-1.

6 Immunity
6.1 Performance criteria
The variety and diversity of the apparatus within the scope of this document makes it difficult
to define precise criteria for the evaluation of the immunity test results. Three general levels
of performance are therefore used, as defined in IEC 62236-1.
6.2 Immunity requirements
The immunity requirements for apparatus covered by this document are given on a port by
port basis.
Test requirements are specified for each port considered.
Tests shall be conducted in a well-defined and reproducible manner. The tests shall be
carried out as single tests in sequence. The sequence of testing is optional. The description
of the test, the test generator, the test methods and the test set-up are given in the basic
standards referred to in Tables 2 to 6.
If the apparatus has a large number of similar ports or ports with many similar connections,
then a sufficient number shall be selected to simulate actual operating conditions and to
ensure that all the different types of termination are covered (e.g. 20 % of the ports or at least
four ports).
The immunity levels given for the apparatus will in most cases allow the apparatus to perform
as intended inside the railway environment. The immunity level establishes a common
reference for evaluating the performance of the apparatus when subject to interference
resulting from direct exposure of the apparatus and associated cables to a radio frequency
field, or by coupling of the interference from a remote source.
The contents of the basic standards are not repeated herein; however, additional information
needed for the practical application of the tests is given where appropriate.
Voltages induced by traction currents are not treated herein. They have to be covered by the
functional specification.
– 12 – IEC 62236-4:2018  IEC 2018

Table 2 – Immunity – Enclosure port
Environmental Test Basic Applicability Performance
Test set-up Remarks
phenomena specification Standard note criteria
2.1 Radio-frequency 80 MHz to 800 MHz IEC 61000-4-3 IEC 61000-4-3  The test level
electromagnetic field. specified is the
10 V/m (r.m.s.) Unmodulated carrier
Amplitude modulated r.m.s. value of A
the unmodulated
80 % AM, 1 kHz
carrier
2.2 Radio-frequency 800 MHz to
electromagnetic field 1 000 MHz
20 V/m (r.m.s.) Unmodulated carrier
80 % AM, 1 kHz
The test level
1 400 MHz to
specified is the
2 000 MHz
r.m.s. value of
the unmodulated
10 V/m (r.m.s.) Unmodulated carrier
carrier
80 % AM, 1 kHz
These tests are
IEC 61000-4-3 IEC 61000-4-3  A
2 000 MHz to intended to
2 700 MHz simulate
disturbances
5 V/m (r.m.s.) Unmodulated carrier
from digital
communication
80 % AM, 1 kHz
devices
5 100 MHz to
6 000 MHz
3 V/m (r.m.s.) Unmodulated carrier
80 % AM, 1 kHz
a
2.3 Power – frequency 16,7 Hz  IEC 61000-4-8 IEC 61000-4-8 See Tests only for
magnetic field applicable
100 A/m
frequencies
Testing time
50 Hz / 60 Hz
A
is ≥ 10s
100 A/m
0 Hz
300 A/m
Environmental Test Basic Applicability Performance
Test set-up Remarks
phenomena specification Standard note criteria
b
2.4 Electrostatic ± 6 kV Contact discharge IEC 61000-4-2 IEC 61000-4-2 See
B
discharge
± 8 kV Air discharge
a
Test only applies to apparatus containing devices sensitive to magnetic fields, e.g. Hall elements, electro-dynamic microphones, etc. Unshielded CRT displays can exhibit
interference effects above 1 A/m (r.m.s.). Equipment mounted directly on the running rails is not covered, as higher field strength may occur.
b
Only applicable to equipment accessible to members of the public and operational staff (not maintenance), otherwise levels specified in IEC 61000-6-2 apply.

– 14 – IEC 62236-4:2018  IEC 2018

Table 3 – Immunity – I/O port
Environmental Test Basic Applicability Performance
Test set-up Remarks
phenomena specification Standard note criteria
a, b, e
3.1 Radio-frequency 0,15 MHz to IEC 61000-4-6 IEC 61000-4-6 See The test level
common mode 80 MHz specified is the
r.m.s. value of the
A
10 V (r.m.s.) Unmodulated carrier
unmodulated
carrier
80 % AM, 1 kHz
e
3.2 Fast transients ±2 kV Peak IEC 61000-4-4 IEC 61000-4-4 See Capacitive clamp
used
T / T A
5/50 ns
r h
5 kHz Repetition frequency
c, d, e
3.3 Surges 1,2 / 50 µs IEC 61000-4-5 IEC 61000-4-5 See All severity levels
below the given
± 2 kV Open circuit test voltage,
severity level
line to earth
have to be tested
with 5 pulses for
± 1 kV Open circuit test voltage,
each severity
line to line
level and a test B
sequence not
alternating, but
starting with one
polarity followed
by the other
polarity.
a
Applicable only to ports interfacing with cables whose total length according to the manufacturer’s specification may exceed 3 m.
b
The test level can also be defined as the equivalent current into a 150 Ω load.
c
An output impedance of 42 Ω (40 Ω and 2 Ω generator) and a coupling capacitance of 0,5 µF are specified.
d
For telecommunication ports and other ports intended for connection to highly balanced pairs, a line to line test is not required.
e
Ports directly connected to power ports or to the (public) low voltage network are classified as power ports also.

Table 4 – Immunity – DC power ports
Environmental Test Basic Applicability Performance
Test set-up Remarks
phenomena specification Standard note criteria

a
Radio-frequency
4.1 0,15 MHz to IEC 61000-4-6 IEC 61000-4-6 See The test level
common mode 80 MHz specified is the
r.m.s. value of the
A
10 V (r.m.s.) Unmodulated carrier
unmodulated carrier
80 % AM, 1 kHz
Fast transients
4.2 ± 2 kV Peak IEC 61000-4-4 IEC 61000-4-4
5/50 ns T / T A
r h
5 kHz Repetition frequency
b
4.3 Surges 1,2 / 50 µs IEC 61000-4-5 IEC 61000-4-5 See All severity levels
below the given
± 2 kV Open circuit test
severity level have to
voltage, line to earth
be tested with 5
pulses for each
± 1 kV Open circuit test
severity level and a B
voltage, line to line
test sequence not
alternating, but
starting with one
polarity followed by
the other polarity.
a
The test level can also be defined as the equivalent current into a 150 Ω load.
b
When the power supply is isolated from earth, an output impedance of 42 Ω (40 Ω and 2 Ω generator) and a coupling capacitance of 0,5 µF are recommended.

– 16 – IEC 62236-4:2018  IEC 2018

Table 5 – Immunity – AC power ports
Environmental Test Basic Applicability Performance
Test set-up Remarks
phenomena specification Standard note criteria

a
5.1 Radio-frequency 0,15 MHz to IEC 61000-4-6 IEC 61000-4-6 See The test level
common mode 80 MHz specified is the
r.m.s. value of
A
10 V (r.m.s.) Unmodulated carrier
the unmodulated
carrier
80 % AM, 1 kHz
5.2 Fast transients ± 2 kV Peak IEC 61000-4-4 IEC 61000-4-4
T / T A
5/50 ns
r h
5 kHz Repetition frequency
5.3 Surges 1,2 / 50 µs IEC 61000-4-5 IEC 61000-4-5  All severity
levels below the
± 2 kV Open circuit test
given severity
voltage, line to earth
level have to be
tested with 5
± 1 kV Open circuit test
pulses for each
voltage, line to line
severity level
B
and a test
sequence not
alternating, but
starting with one
polarity followed
by the other
polarity.
a
The test level can also be defined as the equivalent current into a 150 Ω load.

Table 6 – Immunity – Earth port
Environmental Test Applicability Performance
Basic Standard Test set-up Remarks
phenomena specification note criteria
6.1 Radio-frequency 0,15 MHz to IEC 61000-4-6 IEC 61000-4-6  The test level
common mode 80 MHz specified is the
r.m.s value of the
A
10 V (r.m.s.) Unmodulated carrier
u.nmodulated
carrier
80 % AM, 1 kHz
6.2 Fast transients ±1 kV Peak IEC 61000-4-4 IEC 61000-4-4
T / T A
5/50 ns
r h
5 kHz Rep. frequenc
...