EN 14908-3:2014

Open Data Communication in Building Automation, Controls and Building Management - Control Network Protocol - Part 3: Power Line Channel Specification

This European Standard specifies all the information necessary to facilitate the exchange of data and control information over the power line medium for networked control systems in commercial Building Automation, Controls and Building Management.
This European Standard establishes a minimal set of rules for compliance. It does not rule out extended services to be provided, given that the rules are adhered to within the system. It is the intention of the standard to permit extended services (defined by users) to coexist.
Certain aspects of this standard are defined in other documents. These documents are referenced where relevant. In the case where a referenced standard conflicts with this European Standard, this part of EN 14908 will prevail.

Offene Datenkommunikation für die Gebäudeautomation und Gebäudemanagement – Gebäude-Netzwerk-Protokoll — Teil 3: Kommunikation über die Stromversorgungsleitungen

Réseau ouvert de communication de données pour l'automatisation, la régulation et la gestion technique du bâtiment - Protocole de contrôle du réseau - Partie 3: Spécifications des communications par courants porteurs

La présente norme européenne spécifie toute l’information nécessaire pour faciliter l’échange de données et l’information de contrôle du protocole sur le médium réseau de puissance destiné aux systèmes de contrôle en réseau en matière d'automatisation, de régulation et de gestion technique des bâtiments commerciaux.
La présente norme européenne établit un ensemble minimum de règles pour la conformité. Elle n’exclut pas les services supplémentaires à fournir, pour autant que ces règles soient associées au domaine du système. Il est prévu que cette norme permette aux extensions de services (définies par l’utilisateur) de coexister.
Certains aspects de la présente norme sont définis dans d’autres documents. Ces documents sont référencés autant que de besoin. Dans le cas où une norme référencée entre en contradiction avec la présente norme européenne, cette partie de l'EN 14908 prévaut.

Odprta izmenjava podatkov v avtomatizaciji stavb in izvršnih elementov ter pri upravljanju stavb - Protokol regulacijske mreže - 3. del: Specifikacija kanala močnostnega napajanja

Standard EN 14908-3 navaja vse informacije, potrebne za lažjo izmenjavo podatkov in informacij o nadzoru prek električne napajalne napeljave za mrežne krmilne sisteme v komercialni avtomatizaciji stavb in izvršnih elementov ter pri upravljanju stavb. Ta evropski standard navaja minimalni sklop pravil za ohranjanje skladnosti. Ne onemogoča zagotavljanja širših storitev, če so pravila spoštovana. Namen standarda je, da omogoča soobstoj širših storitev, ki jih opredelijo uporabniki. Določeni vidiki tega standarda so opredeljeni v drugih dokumentih. Standard se na te dokumente nanaša v delih, kjer je to potrebno. Če je kateri od standardov, na katere se ta standard nanaša, v nasprotju s tem evropskim standardom, prevlada ta del standarda EN 14908.

General Information

• Status: Published
• Publication Date: 29-Apr-2014
• ICS: 35.240.67 - IT applications in building and construction industry
• ICS: 35.240.99 - IT applications in other fields
• ICS: 91.140.01 - Installations in buildings in general
• ICS: 97.120 - Automatic controls for household use
• Technical Committee: CEN/TC 247 - Controls for mechanical building services
• Drafting Committee: CEN/TC 247/WG 4 - Open System Data Transmission
• Current Stage: 9060 - Closure of 2 Year Review Enquiry - Review Enquiry
• Start Date: 02-Sep-2025
• Completion Date: 02-Sep-2025
• Mandate: M/490 - Standardisation mandate to the European Standardisation Organisations (ESOs) to support European Smart Grid deployment
• Ref Project: SIST EN 14908-3:2014 - Open Data Communication in Building Automation, Controls and Building Management - Control Network Protocol - Part 3: Power Line Channel Specification

Relations

• Replaces: EN 14908-3:2006 - Open Data Communication in Building Automation, Controls and Building Management - Control Network Protocol - Part 3: Power Line Channel Specification
• Effective Date: 07-May-2014

Overview

EN 14908-3:2014 is the CEN European Standard that defines the Power Line (PL) Channel Specification for the Control Network Protocol (CNP) used in commercial building automation, controls and building management. Part 3 of the EN 14908 CNP series specifies the complete physical layer (OSI Layer 1) for power line communications, including the interface to the MAC sub‑layer and practical guidance for product development, installation and safety.

Key Topics

• Scope and purpose
  • Enables exchange of data and control information over the power line medium for networked control systems.
  • Establishes a minimal rule set for compliance while permitting user-defined extended services to coexist.
• Physical layer and channel
  • Defines the PL data channel as occupying the 125 kHz to 140 kHz band (per EN 50065-1) using Binary Phase Shift Keying (BPSK) modulation.
  • Covers node transmitter and receiver characteristics, word encoding and packet timing at the physical layer.
• Node and connector requirements
  • Nodes must not rely on mains frequency for timing or synchronization.
  • If connectors are used, they must impose negligible signal loss (less than 0.1 dB).
  • Signalling is between phase and neutral; no functional connection to protective earth is allowed.
  • Multi‑phase coupling can use phase couplers in accordance with EN 50065-4-1.
• Electrical safety and hazards
  • Highlights safety concerns: transients, ground potential differences, high neutral voltages, open protective grounds and short‑circuit currents. Designers and installers are directed to follow national and local electrical codes.
• Compliance model
  • Interfaces to EN 14908-1 (Protocol Stack) and other parts of the EN 14908 series (Parts 1–6) are specified; where conflicts occur, EN 14908-3 prevails for PL specifics.

Applications

EN 14908-3 is practical for:

• Manufacturers of PL communication modules and building automation devices.
• System integrators and electrical installers deploying control networks over existing power wiring.
• Building services engineers, facility managers and commissioning teams implementing open CNP systems for HVAC, lighting, access control and energy management.
• Test laboratories validating PL node compliance, connector performance and receiver/transmitter behavior in the 125–140 kHz band.

Related Standards

• EN 14908-1:2014 - Control Network Protocol: Protocol Stack
• EN 14908 (Parts 2, 4–6) - Twisted pair, IP communication, implementation and application elements
• EN 50065-1, EN 50065-2-1, EN 50065-2-2 - Power line signalling bands and immunity requirements
• EN 50065-4-1 - Phase coupler guidance for multi‑phase systems

EN 14908-3:2014 helps ensure interoperable, safe and standardized power line communication for modern building automation, supporting robust device design and reliable deployment over existing electrical infrastructure. Keywords: EN 14908-3, power line communication, building automation, control network protocol, PL channel specification, BPSK, CEN.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Firmenneutrale Datenkommunikation für die Gebäudeautomation und Gebäudemanagement - Gebäudedatennetzprotokoll - Teil 3: Kommunikation über die StromversorgungsleitungenRéseau ouvert de communication de données pour l'automatisation, la régulation et la gestion technique du bâtiment - Protocole de contrôle du réseau - Partie 3 : Spécifications des communications par courants porteursOpen Data Communication in Building Automation, Controls and Building Management - Control Network Protocol - Part 3: Power Line Channel Specification97.120Avtomatske krmilne naprave za domAutomatic controls for household use35.240.99IT applications in other fieldsICS:Ta slovenski standard je istoveten z:EN 14908-3:2014SIST EN 14908-3:2014en,fr,de01-julij-2014SIST EN 14908-3:2014SLOVENSKI
STANDARDSIST EN 14908-3:20071DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 14908-3
April 2014 ICS 35.240.99; 97.120; 91.140.01 Supersedes EN 14908-3:2006English Version
Open Data Communication in Building Automation, Controls and Building Management - Control Network Protocol - Part 3: Power Line Channel Specification
Réseau ouvert de communication de données pour l'automatisation, la régulation et la gestion technique du bâtiment - Protocole de contrôle du réseau - Partie 3 : Spécifications des communications par courants porteurs
Offene Datenkommunikation für die Gebäudeautomation und Gebäudemanagement - Gebäude-Netzwerk-Protokoll -Teil 3: Kommunikation über die StromversorgungsleitungenThis European Standard was approved by CEN on 12 April 2013.
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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 14908-3:2014 ESIST EN 14908-3:2014

EN 14908-3: 2014 (E) 2 Contents
Foreword . 3
Introduction . 4 1 Scope . 5 2 Normative references . 5 3 Terms and definitions . 5 4 General description . 6 4.1 Electrical safety. 6 4.2 Functional partitioning of PL specification . 6 5 Power Line Medium specifications . 6 5.1 Power . 6 5.2 Data channel . 6 5.3 Physical and electrical specifications . 6 5.4 Connectors and coupling . 7 5.5 Signal coupling between phases . 7 5.6 Surge protection and related devices . 7 6 PL Node specifications . 7 6.1 Compliance . 7 6.2 Interface to MAC sub-layer . 7 6.3 Word encoding . 8 6.4 PL packet timing . 8 6.5 Transmitter characteristics . 8 6.5.1 Carrier modulation . 8 6.5.2 Waveform amplitude . 8 6.5.3 Device coupling . 9 6.5.4 Single phase coupling . 9 6.5.5 Multiple phase coupling . 9 6.6 Receiver characteristics . 9 6.6.1 Receive mode effective input impedance . 9 6.6.2 Receiver performance . 10 6.6.3 Receiving on a quiet line . 11 6.6.4 Receiving with interference . 11 6.6.5 Receiving through a distorted channel . 13 6.6.6 Receiving with impulsive noise . 13 Bibliography . 15
EN 14908-3: 2014 (E)
3 Foreword This document (EN 14908-3:2014) has been prepared by Technical Committee CEN/TC 247 “Building Automation, Controls and Building Management”, the secretariat of which is held by SNV. 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 2014 and conflicting national standards shall be withdrawn at the latest by October 2014. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 14908-3:2006. This European Standard is part of a series of standards for open data transmission in building automation, control and in building management systems. The content of this European Standard covers the data communications used for management, automation/control and field functions. EN 14908-3 is part of a series of European Standards under the general title Control Network Protocol (CNP), which comprises the following parts: Part 1: Protocol stack; Part 2: Twisted pair communication; Part 3: Power line channel specification; Part 4: IP-Communication; Part 5: Implementation; Part 6: Application elements. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 14908-3:2014

EN 14908-3: 2014 (E) 4 Introduction This part of EN 14908 specifies the Control Network Power Line (PL) Channel and serves as a companion document to EN 14908-1:2014. Its purpose is to present the information necessary for the development of a PL physical network and nodes to communicate and share information over that network. This is one of a series of documents covering the various media that comprise the CNP standard. This part of EN 14908 covers the complete physical layer (OSI layer 1) including the interface to the Medium Access Control (MAC) Sub-Layer and the interface to the medium. It includes parameters specific to the PL channel type, even though the parameters may be controlled at an OSI layer other than layer 1. This part of EN 14908 also provides a set of guideline physical and electrical specifications for the power line environment as an aid in developing products for that environment. This part of EN 14908 has been prepared to provide mechanisms through which various vendors of building automation, control and of building management systems may exchange information in a standardised way. It defines communication capabilities. This part of EN 14908 is used by all involved in design, manufacture, engineering, installation and commissioning activities. The CNP specification model is based on the OSI 7-layer model Reference Model. There are also important extensions to the OSI Reference Model. Figure 1 shows the scope of this specification in reference to the entire CNP model. In this European Standard, only the parts of the model relevant to power line communication are specified. Anything outside this boundary is covered in other parts of the standard. Similar specifications exist for other CNP media.
Figure 1 — Relationship of CNP 3 specification to the CNP 1 specification SIST EN 14908-3:2014

EN 14908-3: 2014 (E)
5 1 Scope This European Standard specifies all the information necessary to facilitate the exchange of data and control information over the power line medium for networked control systems in commercial Building Automation, Controls and Building Management. This European Standard establishes a minimal set of rules for compliance. It does not rule out extended services to be provided, given that the rules are adhered to within the system. It is the intention of the standard to permit extended services (defined by users) to coexist. Certain aspects of this standard are defined in other documents. These documents are referenced where relevant. In the case where a referenced standard conflicts with this European Standard, this part of EN 14908 will prevail. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 14908-1:2014, Open Data Communication in Building Automation, Controls and Building Management – Control Network Protocol — Part 1: Protocol Stack EN 50065-1, Signalling on low-voltage electrical installations in the frequency range 3 kHz to 148,5 kHz — Part 1: General requirements, frequency bands and electromagnetic disturbances EN 50065-2-1, Signalling on low-voltage electrical installations in the frequency range 3 kHz to 148,5 kHz —Part 2-1: Immunity requirements for mains communications equipment and systems operating in the range of frequencies 95 kHz to 148,5 kHz and intended for use in residential, commercial and light industrial environments EN 50065-2-2, Signalling on low-voltage electrical installations in the frequency range 3 kHz to 148,5 kHz — Part 2-2: Immunity requirements for mains communications equipment and systems operating in the range of frequencies 95 kHz to 148,5 kHz and intended for use in industrial environments 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 14908-1:2014 and the following, specifically with the power line medium and physical layer shown in Figure 1, apply. 3.1 PL node user node attached to the power line medium at a tap that meets the requirements of this specification 3.2 line cord cable not part of the power line network that allows a node located away from the power line network to be connected to the network 3.3 power line network communication network based on power distribution lines (“power lines”), from the final distribution transformer to and including all homes served by that transformer, including all wiring in those homes 3.4 non-network-powered node compatible node that attaches to the power line network but does not draw any power from the network SIST EN 14908-3:2014

EN 14908-3: 2014 (E) 6 4 General description 4.1 Electrical safety This clause gives several recommendations related to safety concerns with respect to this European Standard. This discussion is not complete, nor does it address all possible safety issues. The designer is urged to consult, among other things, the relevant local and national electrical codes for the country of intended use. Local codes may supplement national electrical codes and impose additional safety related requirements. Products conforming to this European Standard shall be designed, constructed, assembled, tested and installed following recognised safety provisions appropriate to products covered by the standard. Power line network cables are subject to at least five direct electrical safety hazards during their use: • high-energy transients coupled into the power line network from external environmental sources; • possible differences between safety grounds to which network components are connected; • possible high voltages on neutral or ground wiring; • possible open safety grounds; • high short-circuit current levels available at interface. These electrical safety hazards should be alleviated for the network to perform properly. In addition to provisions for properly handling these faults in an operational system, special measures should be taken to maintain the intended safety features during changes of an existing network. All wire
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