EN 50090-5-2:2020

SLOVENSKI STANDARD
01-junij-2020
Nadomešča:
SIST EN 50090-5-2:2005
Stanovanjski in stavbni elektronski sistemi (HBES) - 5-2. del: Mediji in nivoji,
odvisni od medijev - Omrežja, ki temeljijo na HBES razreda 1, zviti par
Home and Building Electronic Systems (HBES) Part 5-2: Media and media dependent
layers - Network based on HBES Class 1, Twisted Pair
Elektrische Systemtechnik für Heim und Gebäude (ESHG) - Teil 5-2: Medien und
medienabhängige Schichten - Netzwerk basierend auf ESHG Klasse 1, Twisted Pair
Systèmes électroniques pour les foyers domestiques et les bâtiments (HBES) - Partie 5-
2: Medias et couches dépendantes des medias - Réseau basé sur HBES Classe 1,
Paire Torsadée
Ta slovenski standard je istoveten z: EN 50090-5-2:2020
ICS:
35.240.67 Uporabniške rešitve IT v IT applications in building
gradbeništvu and construction industry
97.120 Avtomatske krmilne naprave Automatic controls for
za dom household use
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 50090-5-2

NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2020
ICS 35.100.20; 97.120; 35.100.10 Supersedes EN 50090-5-2:2004 and all of its
amendments and corrigenda (if any)
English Version
Home and Building Electronic Systems (HBES) Part 5-2: Media
and media dependent layers - Network based on HBES Class 1,
Twisted Pair
Systèmes électroniques pour les foyers domestiques et les Elektrische Systemtechnik für Heim und Gebäude (ESHG) -
bâtiments (HBES) - Partie 5-2: Medias et couches Teil 5-2: Medien und medienabhängige Schichten -
dépendantes des medias - Réseau basé sur HBES Classe Netzwerk basierend auf ESHG Klasse 1, Twisted Pair
1, Paire Torsadée
This European Standard was approved by CENELEC on 2020-01-09. CENELEC 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 CENELEC 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 CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 50090-5-2:2020 E
Contents
European foreword . 4
Introduction. 5
1 Scope . 6
2 Normative references . 6
3 Terms, definitions and abbreviations . 7
3.1 Terms and definitions . 7
3.2 Abbreviations . 8
4 Requirements for HBES Class 1, Twisted Pair Type 1 (TP1-64 and TP1-256) . 9
4.1 Physical layer requirements – Overview . 9
4.2 Requirements for analogue bus signals . 12
4.2.1 General . 12
4.2.2 Specification of logical “1” . 12
4.2.3 Specification of logical “0” (Single) . 13
4.2.4 Specification of logical “0” (overlapping) . 14
4.2.5 Analogue requirements within a transmitted character . 15
4.2.6 Simultaneous sending / collision behaviour . 16
4.3 Medium attachment unit (MAU) . 16
4.3.1 General . 16
4.3.2 Requirements within a physical segment . 16
4.3.3 Remote powered devices (RPD) . 24
4.4 Twisted Pair Type 1 bus cable . 25
4.4.1 Requirements . 25
4.4.2 Measurement of continuous magnetic and electrical interference
respectively transient induced differential voltages . 26
4.5 Topology . 27
4.5.1 Physical segment . 27
4.5.2 Bridge . 27
4.5.3 Router, subline, main line and zone . 28
4.5.4 Gateways to other networks . 29
4.6 Services of the physical layer type Twisted Pair Type 1 . 30
4.6.1 General . 30
4.6.2 Physical_Data service . 30
4.6.3 Physical_Reset service . 32
4.7 Behaviour of the physical layer type Twisted Pair Type 1 entity . 32
4.8 Data link layer type Twisted Pair Type 1 . 32
4.8.1 General . 32
4.8.2 Frame formats . 33
4.8.3 Medium access control . 38
4.8.4 Data link layer services . 41
4.8.5 Data link layer protocol . 44
4.8.6 State machine of data link layer . 46
4.8.7 Parameters of data link layer . 46
4.8.8 Reflections on the system behaviour in case of L_Poll_Data
configuration faults . 47
4.8.9 The data link layer of a bridge . 47
4.8.10 The data link layer of a router . 47
4.8.11 Externally accessible bus monitor and data link layer interface . 47
Bibliography . 48

European foreword
This document (EN 50090-5-2:2020) has been prepared by CLC/TC 205, “Home and Building Electronic
Systems (HBES)”
The following dates are fixed:
• latest date by which this document has (dop) 2020-10-10
to be implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2023-04-10
standards conflicting with this document
have to be withdrawn
This document will supersede EN 50090-5-2:2004 and all of its amendments and corrigenda (if any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
EN 50090-5-2 is part of the EN 50090 series of European Standards, which will comprise the following
parts:
— Part 1: Standardization structure;
— Part 3: Aspects of application;
— Part 4: Media independent layers;
— Part 5: Media and media dependent layers;
— Part 6: Interfaces;
— Part 7: System management;
NOTE Part 2 has been withdrawn.
———————
This document was prepared with the help of CENELEC co-operation partner KNX Association, De Kleetlaan 5, B-
1831 Diegem.
Introduction
According to OSI, Physical Layers consist of the medium, the cable, the connectors, the transmission
technology etc. which refers to their hardware requirements. In this document however, the status of the
Physical Layer as a “communication medium” is emphasized.
1 Scope
This document defines the mandatory and optional requirements for the medium specific physical and
data link layer for HBES Class 1 Twisted Pair TP1.
Data link layer interface and general definitions, which are media independent, are given in
EN 50090-4-2.
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 50090-1, Home and Building Electronic Systems (HBES) — Part 1: Standardization structure
EN 50090-2-2, Home and Building Electronic Systems (HBES) — Part 2-2: System overview — General
technical requirements
EN 50090-3-2, Home and Building Electronic Systems (HBES) — Part 3-2: Aspects of application — User
process for HBES Class 1
EN 50090-4-2, Home and Building Electronic Systems (HBES) — Part 4-2: Media independent layers —
Transport layer, network layer and general parts of data link layer for HBES Class 1
EN 50290 (series), Communication cables
EN 61000-4-5, Electromagnetic compatibility (EMC) — Part 4-5: Testing and measurement techniques —
Surge immunity test (IEC 61000-4-5)
EN 61000-6-1, Electromagnetic compatibility (EMC) — Part 6-1: Generic standards — Immunity for
residential, commercial and light-industrial environments (IEC 61000-6-1)
EN 61000-6-2, Electromagnetic compatibility (EMC) — Part 6-2: Generic standards — Immunity for
industrial environments (IEC 61000-6-2)
HD 21.2 S2, Polyvinyl chloride insulated cables of rated voltages up to and including 450/750 V — Part 2:
Test methods (IEC 60227-2)
HD 22.2 S2, Rubber insulated cables of rated voltages up to and including 450/750 V — Part 2: Test
methods (IEC 60245-2)
IEC 60189-2, Low-frequency cables and wires with PVC insulation and PVC sheath — Part 2: Cables in
pairs, triples, quads and quintuples for inside installations
IEC 60332-1, Tests on electric cables under fire conditions — Part 1: Test on a single vertical insulated
wire or cable
IEC 60754-2, Test on gases evolved during combustion of materials from cables — Part 2: Determination
of acidity (by pH measurement) and conductivity
3 Terms, definitions and abbreviations
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 50090-1 and the following 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
HBES class 1 twisted pair type 1
physical layer specification for data and power transmission on a single twisted pair, allowing
asynchronous character-oriented data transfer in a half-duplex, bi-directional communication mode, using
a specifically balanced/symmetrical base-band signal coding with collision avoidance under SELV
conditions
3.1.2
distributed power supply
powers the bus in a distributed way by a number of the devices connected to the line (compared to a
centralized power supply)
3.1.3
logical tag extended HEE
usage of the L_Data_Extended frame dedicated to extended group addressing
3.1.4
remote powered devices
RPD
do not extract their energy for the application circuit and the bus controller from the bus but from another
independent source of energy, e.g. mains
Note 1 to entry: Owing to the reduced DC power consumption of RPD, a bus line equipped with such devices
requires less power from the installed Power Supply Unit (PSU). The connection of bus-controller and application to
the same electrical potential reduces the effort of galvanic separation in RPD.
3.1.5
TP1 backbone couplers
15 can be used to couple up to 16 zones to a full sized TP1 n
...