IEC 61784-5-21:2018/AMD1:2024

IEC 61784-5-21 ®
Edition 1.0 2024-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
Industrial communication networks – Profiles –
Part 5-21: Installation of fieldbuses – Installation profiles for CPF 21

Réseaux de communication industriels – Profils –
Partie 5-21: Installation des bus de terrain – Profils d’installation pour CPF 21
IEC 61784-5-21:2018-08/AMD1:2024-03(en-fr)

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IEC 61784-5-21 ®
Edition 1.0 2024-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
Industrial communication networks – Profiles –

Part 5-21: Installation of fieldbuses – Installation profiles for CPF 21

Réseaux de communication industriels – Profils –

Partie 5-21: Installation des bus de terrain – Profils d’installation pour CPF 21

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 25.040.40, 35.100.40 ISBN 978-2-8322-8403-2

– 2 – IEC 61784-5-21:2018/AMD1:2024
© IEC 2024
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INDUSTRIAL COMMUNICATION NETWORKS –
PROFILES −
Part 5-21: Installation of fieldbuses –
Installation profiles for CPF 21

AMENDMENT 1
FOREWORD
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co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
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shall not be held responsible for identifying any or all such patent rights.
Amendment 1 to IEC 61784-5-21:2018 has been prepared by subcommittee 65C: Industrial
networks, of IEC technical committee 65: Industrial-process measurement, control and
automation.
© IEC 2024
The text of this Amendment is based on the following documents:
Draft Report on voting
65C/1283/FDIS 65C/1297/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this Amendment is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications/.
A list of all parts of IEC 61784-5 series, under the general title Industrial networks – Profiles –
Installation of fieldbuses, 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 webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn, or
• revised.
IMPORTANT – The "colour inside" logo on the cover page of this document indicates
that it contains colours which are considered to be useful for the correct understanding
of its contents. Users should therefore print this document using a colour printer.

___________
INTRODUCTION to Amendment 1
This Amendment 1 includes the following significant technical changes with respect to
IEC 61784-5-21:2018:
a) in A.4.3.2.3, Table A.1:
– 1 000 (Mbit/s) is added to "Supported data rates (Mbit/s)",
– Category 5e is added to "Cable category per ISO/IEC 11801-3",
– Category 5e is added to "Connecting HW category per ISO/IEC 11801-3";
b) in A.4.3.2.4, Table A.2, Single mode silica:
– "Bandwidth (MHz) or equivalent at λ (nm)" is changed to 120 and 1 500,
– "Maximum channel Insertion loss/optical power budget (dB)" is changed to 10,5.

– 4 – IEC 61784-5-21:2018/AMD1:2024
© IEC 2024
FOREWORD
Replace "This document is to be used in conjunction with IEC 61918:2018" with "This document
is to be used in conjunction with IEC 61918:2018, IEC 61918:2018/AMD1:2022 and
IEC 61918:2018/AMD2:2024".
INTRODUCTION
Replace, at the beginning of the first paragraph, "International Standard" with "document".
Replace, at the beginning of the second paragraph, "IEC 61918:2018 provides" with
"IEC 61918:2018, IEC 61918:2018/AMD1:2022 and IEC 61918:2018/AMD2:2024 provide".
Delete, in the last paragraph, the comma after the brackets.
Replace the existing Figure 1 with the following new figure:

Figure 1 – Standards relationships
1 Scope
Replace the existing second paragraph with the following new paragraph:
The installation profile is specified in the annex. This annex is read in conjunction with
IEC 61918:2018, IEC 61918:2018/AMD1:2022 and IEC 61918:2018/AMD2:2024.

© IEC 2024
2 Normative references
Replace the existing reference to IEC 61918 with the following new reference:
IEC 61918:2018 , Industrial communication networks – Installation of communication networks
in industrial premises
IEC 61918:2018/AMD1:2022
IEC 61918:2018/AMD2:2024
Delete the last sentence before the NOTE.
3 Terms, definitions, and abbreviated terms
Replace, in the first sentence, "IEC 61918:2018, Clause 3," with " IEC 61918:2018, Clause 3,
and IEC 61918:2018/AMD1:2022, Clause 3".
6 Conformance to installation profiles
Delete, in the first sentence of the second paragraph, the footnote.
Replace the existing two items in the list of the second paragraph with the following new items:
"Compliance with IEC 61784-5-21:2018 and IEC 61784-5-21:2018/AMD1:2024 for CP 21/m
or"
"Compliance with IEC 61784-5-21 (Ed.1.1) for CP 21/m ".
Replace, in the sentence after the two items, "are not to be" with "shall not be".
Replace, in the NOTE, "may" with "can".
A.2 Normative references
Replace "IEC 60793-2-50:2015" with "IEC 60793-2-50:2018".
___________
The normative references of IEC 61918:2018, Clause 2, IEC 61918:2018/AMD1:2022, Clause 2 and
IEC 61918:2018/AMD2:2024, Clause 2, apply.

– 6 – IEC 61784-5-21:2018/AMD1:2024
© IEC 2024
A.4.3.2.3 Network characteristics for balanced cabling based on Ethernet
Replace the existing Table A.1 with the following new table:
Table A.1 – Network characteristics for balanced cabling based on Ethernet
Characteristic CP 21/1
Supported data rates (Mbit/s) 100, 1 000
b
Supported channel length (m)
a b
Number of connections in the channel (max.) 4
a
Patch cord length (m) 100
b
Channel class per ISO/IEC 11801-3 (min.) D
c
5, 5e
Cable category per ISO/IEC 11801-3 (min.)
Conn
...