SIST EN 1434-3:2025
(Main)Thermal energy meters - Part 3: Data exchange and interfaces
Thermal energy meters - Part 3: Data exchange and interfaces
This document specifies the general requirements of data exchange and interfaces for thermal energy meters.
This document is applicable to unidirectionally and bidirectionally transmitting thermal energy meters.
This document applies also to networks with up to 250 meters, for which a master unit with AC mains supply is necessary to control the M-Bus. In these cases, the document is only applicable in conjunction with EN 13757-2 (physical and link layer) and EN 13757-3 (application layer).
For wireless thermal energy meter communications, this document is only applicable in conjunction with EN 13757-4, which describes several alternatives of walk/drive-by readout via a mobile station or by using stationary receivers or a network.
NOTE Thermal energy meters are instruments intended for measuring the energy which in a heat-exchange circuit is absorbed (cooling) or given up (heating) by a liquid called the heat-conveying liquid. The meter indicates thermal energy in legal units.
Thermische Energiezähler - Teil 3: Datenaustausch und Schnittstellen
Dieses Dokument legt die allgemeinen Anforderungen an den Datenaustausch und die Schnittstellen von thermischen Energiemessgeräten fest.
Dieses Dokument ist auf thermische Energiemessgeräte mit unidirektionaler und mit bidirektionaler Übertragung anwendbar.
Dieses Dokument ist auch auf Netzwerke von bis zu 250 m anwendbar, bei denen eine Master-Einheit mit Wechselstromversorgung erforderlich ist, um den M Bus zu steuern. In diesen Fällen ist das Dokument nur in Verbindung mit EN 13757 2 (Bitübertragungsschicht und Sicherungsschicht) und EN 13757 3 (Anwendungsschicht) anwendbar.
Im Hinblick auf die Kommunikation von thermischen Energiemessgeräten über Funk ist dieses Dokument nur in Verbindung mit EN 13757 4 anwendbar, worin mehrere Alternativen des mobilen Auslesens oder des Auslesens durch Verwendung eines ortsfesten Empfängers oder eines Netzwerks beschrieben werden.
ANMERKUNG Thermische Energiemessgeräte sind Geräte zum Messen der Energiemenge, die in einem Wärmeübertragerkreislauf von einer Flüssigkeit, der sogenannten Wärmeträgerflüssigkeit, absorbiert (Kühlung) oder abgegeben (Heizen) wird. Das Gerät zeigt die thermische Energie in gesetzlichen Einheiten an.
Compteurs d'énergie thermique - Partie 3 : Échange de données et interfaces
Le présent document spécifie les exigences générales d’échange de données et interfaces relatives aux compteurs d’énergie thermique.
Le présent document est applicable aux compteurs d’énergie thermique à transmission unidirectionnelle et bidirectionnelle.
Le présent document s’applique également aux réseaux contenant jusqu’à 250 compteurs, pour lesquels une unité principale avec une alimentation secteur en courant alternatif est nécessaire pour commander le M-Bus. Dans ces cas, le document n’est applicable que conjointement à l’EN 13757-2 (couche physique et de liaison) et l’EN 13757-3 (couche d’application).
Pour les communications avec compteurs d’énergie thermique sans fil, le présent document n’est applicable que conjointement à l’EN 13757-4, qui décrit plusieurs alternatives de lectures à pied/en voiture par l’intermédiaire d’un poste mobile ou en utilisant des récepteurs fixes ou un réseau.
NOTE Les compteurs d’énergie thermique sont des instruments destinés à mesurer l’énergie thermique qui, dans un circuit d’échange thermique, est absorbée (refroidissement) ou délivrée (chauffage) par un liquide appelé « liquide caloporteur ». Le compteur indique l’énergie thermique en unités légales.
Merilniki toplote - 3. del: Izmenjava podatkov in vmesniki
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
01-junij-2025
Merilniki toplote - 3. del: Izmenjava podatkov in vmesniki
Thermal energy meters - Part 3: Data exchange and interfaces
Thermische Energiezähler - Teil 3: Datenaustausch und Schnittstellen
Compteurs d'énergie thermique - Partie 3 : Échange de données et interfaces
Ta slovenski standard je istoveten z: EN 1434-3:2025
ICS:
17.200.10 Toplota. Kalorimetrija Heat. Calorimetry
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 1434-3
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2025
EUROPÄISCHE NORM
ICS 17.200.10 Supersedes EN 1434-3:2015
English Version
Thermal energy meters - Part 3: Data exchange and
interfaces
Compteurs d'énergie thermique - Partie 3 : Échange de Thermische Energiezähler - Teil 3: Datenaustausch und
données et interfaces Schnittstellen
This European Standard was approved by CEN on 4 November 2024.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 1434-3:2025 E
worldwide for CEN national Members.
Contents Page
European foreword . 4
1 Scope . 6
2 Normative references . 6
3 Terms, definitions and abbreviated terms . 6
3.1 Terms and definitions . 6
3.2 Abbreviated terms . 6
4 Meter interfaces and protocols overview . 7
5 Physical layer . 7
5.1 General. 7
5.2 Physical layer optical interface . 7
5.3 Physical layer M-Bus . 7
5.4 Physical layer wireless interface. 7
6 Link layer . 8
6.1 Link layer optical interface . 8
6.1.1 Link layer optical interface with the EN 13757-2 protocol . 8
6.1.2 Link layer optical interface with automatic protocol recognition . 8
6.2 Link layer of M-Bus . 8
6.3 Link layer wireless interface . 8
7 Application layer . 8
7.1 Application layer optical interface . 8
7.2 Application layer M-Bus . 8
7.2.1 General. 8
7.2.2 Coding of data records . 8
8 Application - Minimum function implementation . 9
8.1 General. 9
8.2 Physical layer . 9
8.3 Link layer . 9
8.4 Application layer . 9
8.5 Control applications . 9
Annex A (informative) Recommendation for thermal energy meter test interface . 10
Annex B (informative) Additional information for thermal energy meters . 11
Annex C (informative) Automatic protocol detection and wake-up for the optical interface. 12
C.1 Introduction . 12
C.2 Trying EN 13757-2 protocol . 12
C.3 Trying the EN 62056-21 protocol . 12
Annex D (normative) Usage of thermal energy meters in control applications . 13
D.1 Thermal energy meter . 13
D.2 Controller . 14
Annex E (informative) Protection techniques for M-Bus meters against surge/lightning . 16
Bibliography . 17
European foreword
This document (EN 1434-3:2025) has been prepared by Technical Committee CEN/TC 294
“Communication systems for meters”, the secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by October 2025, and conflicting national standards shall
be withdrawn at the latest by October 2025.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 1434-3:2015.
a) change from heat to thermal energy meters in accordance with the EN 1434 series;
b) deletion of former Annex B, Additional information for thermal energy meters;
c) protocol modes according to EN 62056-21 for the optical interface of thermal energy meters are no
longer supported;
d) deletion of (sub)Clauses 5.1.2, 5.4, and C.3 (regarding EN 62056-21 protocol) as well as in subclause
6.1;
e) Clause 4.5 Physical layer current loop interface was deleted and Table 1 updated;
f) Clause 4.6 Physical layer local bus was deleted in accordance with the withdrawal of EN 13757-6;
g) Clause 5.4 Link layer current-loop interface was deleted;
h) former Annex E, Protection techniques for M-Bus meters against surge/lightning, was moved to
EN 13757-2.
EN 1434 consists of the following parts, under the general title “Thermal energy meters”:
— Part 1: General requirements;
— Part 2: Constructional requirements;
— Part 3: Data exchange and interfaces (this document);
— Part 4: Pattern approval tests;
— Part 5: Initial verification tests;
— Part 6: Installation, commissioning, operational monitoring and maintenance.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland,
Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North
Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the United
Kingdom.
1 Scope
This document specifies the general requirements of data exchange and interfaces for thermal energy
meters.
This document is applicable to unidirectionally and bidirectionally transmitting thermal energy meters.
This document applies also to networks with up to 250 meters, for which a master unit with AC mains
supply is necessary to control the M-Bus. In these cases, the document is only applicable in conjunction
with EN 13757-2 (physical and link layer) and EN 13757-3 (application layer).
For wireless thermal energy meter communications, this document is only applicable in conjunction with
EN 13757-4, which describes several alternatives of walk/drive-by readout via a mobile station or by
using stationary receivers or a network.
NOTE Thermal energy meters are instruments intended for measuring the energy which in a heat-exchange
circuit is absorbed (cooling) or given up (heating) by a liquid called the heat-conveying liquid. The meter indicates
thermal energy in legal units.
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.
EN 13757-3:2025, Communication systems for meters and remote reading of meters — Part 3: Dedicated
application layer
EN 13757-4, Communication systems for meters — Part 4: Wireless M-Bus communication
EN 13757-7:2025, Communication systems for meters — Part 7: Transport and security services
3 Terms, definitions and abbreviated terms
3.1 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp/
— IEC Electropedia: available at https://www.electropedia.org/
3.2 Abbreviated terms
For the purposes of this document, the following abbreviated terms apply.
DIF Data information field (see EN 13757-3)
VIF Value information field (see EN 13757-3)
4 Meter interfaces and protocols overview
Table 1 — Possible combinations of interfaces and standards
Hardware interface type Recommended standard Alternative standards
Optical EN 13757-2 No alternative
EN 62056-21:2002, 3.2
M-Bus EN 13757-2 No alternative
Wireless EN 13757-4 and EN 13757-5 No alternative
Transport layer EN 13757-7 No alternative
Application layer EN 13757-3 EN 13757-1
(All interfaces)
5 Physical layer
5.1 General
A meter can have either none or a number of interfaces to communicate with the outside world. If a meter
has an interface in accordance with this standard, it shall fulfil at least one of the following requirements
for the physical layer.
5.2 Physical layer optical interface
The optical interface is used for local data readout. A hand-held unit, equipped with an optical readout
head, is temporarily connected to one thermal energy meter an
...
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