Electrical equipment for measurement, control and laboratory use - EMC requirements - Part 2-5: Particular requirements - Test configurations, operational conditions and performance criteria for field devices with field bus interfaces according to IEC 61784-1

IEC 61326-2-5:2020 is available as IEC 61326-2-5:2020 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 61326-2-5:2020 treats the particular features for EMC testing of field devices with field bus interfaces. This part of IEC 61326 covers only the field bus interface of the equipment. This part refers only to field devices intended for use in process control and process measuring. In this document, field devices with interfaces according to IEC 61784-1:2019, CP 3/2 and CP 1/1 as defined in IEC 61784 are covered. Other field bus interfaces may be included in future editions of this document.

Matériel électrique de mesure, de commande et de laboratoire - Exigences relatives à la CEM - Partie 2-5: Exigences particulières - Configurations d'essai, conditions de fonctionnement et critères de performance pour les équipements de terrain avec des interfaces utilisant des bus de terrain conformes à l'IEC 61784-1

IEC 61326-2-5:2020 est disponible sous forme de IEC 61326-2-5:2020 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.L'IEC 61326-1:2020 traite des caractéristiques particulières pour les essais de CEM des équipements de terrain avec des interfaces utilisant des bus de terrain. La présente partie de l’IEC 61326 couvre uniquement l'interface utilisant le bus de terrain du matériel.La présente partie fait uniquement référence aux équipements de terrain destinés à être utilisés pour les commandes et les mesurages des processus. Le présent document traite des équipements de terrain utilisant des interfaces conformes à l’IEC 61784-1:2019, CP 3/2 et CP 1/1 telles qu'elles sont définies dans l’IEC 61784. D'autres interfaces de bus de terrain peuvent être incluses dans les futures éditions du présent document.

General Information

Status
Published
Publication Date
28-Oct-2020
Technical Committee
Current Stage
PPUB - Publication issued
Completion Date
29-Oct-2020
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IEC 61326-2-5:2020 - Electrical equipment for measurement, control and laboratory use - EMC requirements - Part 2-5: Particular requirements - Test configurations, operational conditions and performance criteria for field devices with field bus interfaces according to IEC 61784-1
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IEC 61326-2-5
Edition 3.0 2020-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electrical equipment for measurement, control and laboratory use –
EMC requirements –
Part 2-5: Particular requirements – Test configurations, operational conditions

and performance criteria for field devices with field bus interfaces according to

IEC 61784-1
Matériel électrique de mesure, de commande et de laboratoire –
Exigences relatives à la CEM –
Partie 2-5: Exigences particulières – Configurations d'essai, conditions de
fonctionnement et critères de performance pour les équipements de terrain avec
des interfaces utilisant des bus de terrain conformes à l’IEC 61784-1
IEC 61326-2-5:2020-10(en-fr)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 61326-2-5
Edition 3.0 2020-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electrical equipment for measurement, control and laboratory use –
EMC requirements –
Part 2-5: Particular requirements – Test configurations, operational conditions

and performance criteria for field devices with field bus interfaces according to

IEC 61784-1
Matériel électrique de mesure, de commande et de laboratoire –
Exigences relatives à la CEM –
Partie 2-5: Exigences particulières – Configurations d'essai, conditions de
fonctionnement et critères de performance pour les équipements de terrain
avec des interfaces utilisant des bus de terrain conformes à l’IEC 61784-1
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 17.220.20; 25.040.40; 33.100.20 ISBN 978-2-8322-8952-5

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – IEC 61326-2-5:2020 © IEC 2020
CONTENTS

FOREWORD ........................................................................................................................... 3

1 Scope .............................................................................................................................. 5

2 Normative references ...................................................................................................... 5

3 Terms and definitions ...................................................................................................... 6

4 General ........................................................................................................................... 6

5 EMC test plan .................................................................................................................. 6

5.1 General ................................................................................................................... 6

5.2 Configuration of EUT during testing ........................................................................ 6

5.3 Operation conditions of EUT during testing ............................................................. 6

5.4 Specification of FUNCTIONAL PERFORMANCE .............................................................. 6

5.5 Test description ...................................................................................................... 6

6 Immunity requirements .................................................................................................... 6

6.1 Conditions during the tests...................................................................................... 6

6.2 Immunity test requirements ..................................................................................... 7

6.3 Random aspects ..................................................................................................... 7

6.4 Performance criteria ............................................................................................... 7

7 Emission requirements .................................................................................................... 7

8 Test results and test report .............................................................................................. 7

9 Instructions for use .......................................................................................................... 7

Annex A (normative) Immunity test requirements for PORTABLE TEST AND MEASUREMENT

EQUIPMENT powered by battery or from the circuit being measured .......................................... 8

Annex B (informative) Guide for analysis and assessment for electromagnetic

compatibility............................................................................................................................ 9

Annex AA (normative) Particular requirements – Test configurations, operational

conditions and performance criteria for field devices with field bus interfaces according

to IEC 61784-1 CP 1/1 .......................................................................................................... 10

AA.1 General ................................................................................................................. 10

AA.2 EMC test plan ....................................................................................................... 10

AA.2.1 Configuration of EUT with CP 1/1 interface during testing .............................. 10

AA.2.2 Operation conditions of EUT with CP 1/1 interface during testing ................... 12

AA.3 Performance criteria ............................................................................................. 14

AA.4 Information on the host system ............................................................................. 14

Annex BB (normative) Particular requirements – Test configurations, operational

conditions and performance criteria for field devices with field bus interfaces according

to IEC 61784-1 CP 3/2 .......................................................................................................... 15

BB.1 General ................................................................................................................. 15

BB.2 EMC test plan ....................................................................................................... 15

BB.2.1 Configuration of EUT with CP 3/2 interface during testing .............................. 15

BB.2.2 Operation conditions of EUT with CP 3/2 interface during testing ................... 17

BB.3 Performance criteria ............................................................................................. 18

Figure AA.1 – Test set up for EUT with CP 1/1 interface ....................................................... 12

Figure BB.1 – Test set up for EUT with CP 3/2 interface ....................................................... 17

---------------------- Page: 4 ----------------------
IEC 61326-2-5:2020 © IEC 2020 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRICAL EQUIPMENT FOR MEASUREMENT,
CONTROL AND LABORATORY USE –
EMC REQUIREMENTS –
Part 2-5: Particular requirements –
Test configurations, operational conditions and performance criteria
for field devices with field bus interfaces according to IEC 61784-1
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,

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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

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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 61326-2-5 has been prepared by subcommittee 65A: System

aspects, of IEC technical committee 65: Industrial-process measurement, control and

automation.

This third edition cancels and replaces the second edition published in 2012. This edition

constitutes a technical revision.

This edition includes the following significant technical change with respect to the previous

edition:
– update with respect to IEC 61326-1:2020.
---------------------- Page: 5 ----------------------
– 4 – IEC 61326-2-5:2020 © IEC 2020
The text of this International Standard is based on the following documents:
FDIS Report on voting
65A/978/FDIS 65A/989/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.

This part of IEC 61326 series is to be used in conjunction with IEC 61326-1:2020 and follows

the same numbering of clauses, subclauses, tables and figures.

When a particular subclause of IEC 61326-1 is not mentioned in this part, that subclause applies

as far as is reasonable. When this standard states “addition”, “modification” or “replacement”,

the relevant text in IEC 61326-1 is to be adapted accordingly.
NOTE The following numbering system is used:

– subclauses, tables and figures that are numbered starting from 101 are additional to those in IEC 61326-1;

– unless notes are in a new subclause or involve notes in IEC 61326-1, they are numbered starting from 101

including those in a replaced clause or subclause;
– additional annexes are lettered AA, BB, etc.

A list of all parts of IEC 61326 series, under the general title Electrical equipment for

measurement, control and laboratory use – EMC requirements 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.
---------------------- Page: 6 ----------------------
IEC 61326-2-5:2020 © IEC 2020 – 5 –
ELECTRICAL EQUIPMENT FOR MEASUREMENT,
CONTROL AND LABORATORY USE –
EMC REQUIREMENTS –
Part 2-5: Particular requirements –
Test configurations, operational conditions and performance criteria
for field devices with field bus interfaces according to IEC 61784-1
1 Scope

In addition to the requirements of IEC 61326-1, this part of IEC 61326 treats the particular

features for EMC testing of field devices with field bus interfaces. This part of IEC 61326 covers

only the field bus interface of the equipment.

NOTE The other functions of the equipment remain covered by other parts of IEC 61326 series.

This part refers only to field devices intended for use in process control and process measuring.

In this document, field devices with interfaces according to IEC 61784-1:2019, CP 3/2 and

CP 1/1 as defined in IEC 61784 are covered. Other field bus interfaces may be included in

future editions of this document.

IEC 61784-1:2019 specifies a set of protocol specific communication profiles based on

IEC 61158.

The manufacturer specifies the environment for which the product is intended to be used and/or

selects the appropriate test level specifications of IEC 61326-1.
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.
Clause 2 of IEC 61326-1:2020 applies except as follows:
Addition:

IEC 61158-2:2014, Industrial communication networks – Fieldbus specifications – Part 2:

Physical layer specification and service definition

IEC 61158-3-3:2014, Industrial communication networks – Fieldbus specifications – Part 3-3:

Data-link layer service definition – Type 3 elements

IEC 61158-5-5:2014, Industrial communication networks – Fieldbus specifications – Part 5-5:

Application layer service definition – Type 5 elements

IEC 61158-6-10:2019, Industrial communication networks – Fieldbus specifications – Part 6-10:

Application layer protocol specification – Type 10 elements
---------------------- Page: 7 ----------------------
– 6 – IEC 61326-2-5:2020 © IEC 2020

IEC 61326-1:2020, Electrical equipment for measurement, control and laboratory use – EMC

requirements – Part 1: General requirements

IEC 61784-1:2019, Industrial communication networks – Profiles – Part 1: Fieldbus profiles

3 Terms and definitions
Clause 3 of IEC 61326-1:2020 applies.

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
4 General
Clause 4 of IEC 61326-1:2020 applies.
5 EMC test plan
5.1 General
Subclause 5.1 of IEC 61326-1:2020 applies.
5.2 Configuration of EUT during testing
Subclause 5.2 of IEC 61326-1:2020 applies, except as follows:
Addition:
Additional requirements: see Annex AA and Annex BB.
5.3 Operation conditions of EUT during testing
Subclause 5.3 of IEC 61326-1:2020 applies, except as follows:
Addition:
Additional requirements: see Annex AA and Annex BB.
5.4 Specification of FUNCTIONAL PERFORMANCE
Subclause 5.4 of IEC 61326-1:2020 applies.
5.5 Test description
Subclause 5.5 of IEC 61326-1:2020 applies.
6 Immunity requirements
6.1 Conditions during the tests
Subclause 6.1 of IEC 61326-1:2020 applies.
---------------------- Page: 8 ----------------------
IEC 61326-2-5:2020 © IEC 2020 – 7 –
6.2 Immunity test requirements
Subclause 6.2 of IEC 61326-1:2020 applies.
6.3 Random aspects
Subclause 6.3 of IEC 61326-1:2020 applies.
6.4 Performance criteria
Subclause 6.4 of IEC 61326-1:2020 applies, except as follows:
Addition:
Additional requirements: see Annex AA and Annex BB.
7 Emission requirements
Clause 7 of IEC 61326-1:2020 applies.
8 Test results and test report
Clause 8 of IEC 61326-1:2020 applies, except as follows:
Addition:
The type of shield connection at the EUT shall be stated in the test report.
9 Instructions for use
Clause 9 of IEC 61326-1:2020 applies.
---------------------- Page: 9 ----------------------
– 8 – IEC 61326-2-5:2020 © IEC 2020
Annex A
(normative)
Immunity test requirements for PORTABLE TEST AND MEASUREMENT
EQUIPMENT powered by battery or from the circuit being measured
Annex A of IEC 61326-1:2020 does not apply.
---------------------- Page: 10 ----------------------
IEC 61326-2-5:2020 © IEC 2020 – 9 –
Annex B
(informative)
Guide for analysis and assessment for electromagnetic compatibility
Annex B of IEC 61326-1:2020 applies.
Additional annexes:
---------------------- Page: 11 ----------------------
– 10 – IEC 61326-2-5:2020 © IEC 2020
Annex AA
(normative)
Particular requirements –
Test configurations, operational conditions and performance criteria for
field devices with field bus interfaces according to IEC 61784-1 CP 1/1
AA.1 General

In connection with the main part of this document, this Annex AA describes specific test

configurations, operational conditions and performance criteria regarding the field bus interface

using the communication profile CP 1/1 according to IEC 61784-1:2019.

To prevent confusion with requirements of other annexes, the equipment under test (EUT) is

called “EUT with CP 1/1 interface” throughout this annex.
AA.2 EMC test plan
AA.2.1 Configuration of EUT with CP 1/1 interface during testing
Subclause 5.2 of IEC 61326-1:2020 applies, except as follows:
Addition:
AA.2.1.1 Test configuration for EUT with CP 1/1 interface

In order to assign any malfunction of the communication during the EMC-test to the EUT with

CP 1/1 interface, the configuration of field devices with interfaces according to

IEC 61784-1:2019, CP 1/1 shall be limited to the operation of one host system and one EUT

with CP 1/1 interface during EMC type tests.

Ports other than I/O ports covered by this part of the document are tested according to

IEC 61326-1:2020.
The connection plan is shown in Figure AA.1.

The field device is connected via a device coupler with the power conditioner and the host

system.

A standardised field bus terminator is attached at the third port of the device coupler.

The EUT with CP 1/1 interface, power conditioner, host system, device coupler(s) and

terminator are connected by means of a standard type A field bus cable (foil shield, foil

shield/mesh). Armoured cables or cables in conduit are not allowed for EMC testing.

Except for the connection at the EUT with CP 1/1 interface itself (see AA.2.1.3), the shield shall

be connected at any individual component by a low-impedance grounding strip (connection

between shield and the case with a large surface).

The individual cable lengths L1, L2, L3, L5 and L6 originate from a practice-adjusted set up,

preferred as given in Figure AA.1.

The cable length L4 should be 8 m ± 1 m, in case that the respective basic standards do not

specify other lengths. The cable installation shall be in accordance with the appropriate basic

standard.
---------------------- Page: 12 ----------------------
IEC 61326-2-5:2020 © IEC 2020 – 11 –

The connection of the shield at the shield grounding point may be produced by partially

removing the insulation of the cable shield and fixing the cable shield with a metal clamp or by

means of conductive leading-in-conductors such as a metallic cable gland at the ground plane

or at the shielding metal wall respectively.

The location and execution of the shield grounding point depend on the given test facility, e.g.

by use of an anechoic chamber or a shielded cabin it is the metal wall penetration; and with

tests on tables with ground plane the shield grounding point is on the ground plane.

AA.2.1.2 Connection cable for EUT with CP 1/1 interface

A standard bus cable type A shall be used as communication cable (see IEC 61158-2:2014,

12.8.2). The cable lengths L1 to L4, are given in Figure AA.1 and additional requirement for L4

is described in AA.2.1.1. The lengths of L5 and L6 are not specified and depend on the installed

equipment.
AA.2.1.3 Connections at the EUT with CP 1/1 interface

The grounding of the EUT with CP 1/1 interface shall be in accordance with the manufacturer’s

specification.

The shield of the cable shall be connected in the most sensitive method (for example with the

shield not connected at the EUT with CP 1/1 interface) if not otherwise specified by the

manufacturer.
AA.2.1.4 Field bus network

The field bus network shall include the terminator of the bus, device coupler(s), the host system

and the EUT with CP 1/1 interface. For bus-powered devices, the field bus network includes

additionally the power conditioner and the power supply. The evaluation and conditioning of the

data in the host system are not the object of this part of the document. The device coupler(s)

and the bus terminator are passive components only.
---------------------- Page: 13 ----------------------
– 12 – IEC 61326-2-5:2020 © IEC 2020
Components Key
A host system 1 shield grounding point (SGP) of L4
B field device (EUT with CP 1/1 2 shield / housing connected with low
interface) impedance
C power conditioner (5 mH+50 Ω) 2a enclosure connected with low impedance
D EMC test place 3 cable from device coupler(s) to SGP
E1, E2 device coupler(s) 4 terminator, either direct at device coupler or
after a short cable (< 1 m)
T bus terminator 5 cable from SGP to field device
G power supply 6 connection of shield at field device (see
AA.2.1.3)

L1 8 m cable type A 7 A, C, G, E1 and T may be included in a single housing /

system / device
L2 2 m cable type A L3 2 m cable type A
L4 8 m cable type A (see AA.2.1.2) L5, L6 cable type A (see AA.2.1.2)
Figure AA.1 – Test set up for EUT with CP 1/1 interface
AA.2.2 Operation conditions of EUT with CP 1/1 interface during testing
Subclause 5.3 of IEC 61326-1:2020 applies, except as follows:
Addition:
AA.2.2.1 Operational conditions for EUT with CP 1/1 interface

a) The macrocycle of the field bus segment should be as short as possible to have as often as

possible communication on the bus and to have fast reaction of the system.
---------------------- Page: 14 ----------------------
IEC 61326-2-5:2020 © IEC 2020 – 13 –

b) For a transmitter type device, there shall be a Publisher Subscriber communication

relationship for each process value and its status (e.g. output parameter of AI or DI) that

the EUT with CP 1/1 interface offers. The EUT with CP 1/1 interface has the role ‘Publisher’.

c) For a receiver type device there shall be:

– a Publisher Subscriber communication relationship for each setpoint/input value and its

status (e.g. input parameter of AO or DO) that the EUT with CP 1/1 interface accepts; in

this/these relationship(s) the EUT with CP 1/1 interface has the role ‘Subscriber’;

– and a Publisher Subscriber communication relationship for each output value and its

status (e.g. BKCAL_OUT/BKCAL_OUT_D) that the EUT with CP 1/1 interface offers; in

this/these relationship(s) the EUT with CP 1/1 interface has the role ‘Publisher’.

d) The “Stale Count Limit” has to be set to 2.

In cases where the “Stale count Limit” is not adjustable, the value (not equal to 2) shall be

stated in the test report.

e) The frequency of client-server communication shall be set to one service request (e.g. read

request) every other macrocycle.
AA.2.2.2 Status for EUT with CP 1/1 interface

The host system monitors the received data of the EUT with CP 1/1 interface. The received

data is of the data type QualifiedFloat32 or QualifiedUnsigned8 as defined in IEC 61158-5-

5:2014, 5.3.3.12 respectively 5.3.3.13. Those data types are of the format STRUCTURE and

have a field named status.
For the automation system and the test evaluation, the quality in the status
...

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