1、 Reference number ISO/IEC 14908-3:2012(E) ISO/IEC 2012INTERNATIONAL STANDARD ISO/IEC 14908-3 First edition 2012-02-15 Information technology Control network protocol Part 3: Power line channel specification Technologies de linformation Protocole de rseau de contrle Partie 3: Spcification de canal de
2、 courants porteurs ISO/IEC 14908-3:2012(E) COPYRIGHT PROTECTED DOCUMENT ISO/IEC 2012 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permiss
3、ion in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO/IEC 2012 All rights res
4、erved - 2 - 14908-3 ISO/IEC:2012 (E) Contents Page Foreword4 Introduction5 1 Scope 7 2 Normative references7 3 Terms and definitions .7 4 General description 8 4.1 Electrical safety .8 4.2 Functional partitioning of PL specification .8 5 Power Line Medium specifications.9 5.1 Power .9 5.2 Data chann
5、el .9 5.3 Physical and electrical specifications 9 5.4 Connectors and coupling9 5.5 Signal coupling between phases.9 5.6 Surge protection and related devices 10 6 PL Node specifications .10 6.1 Compliance .10 6.2 Interface to MAC sub-layer.10 6.3 Word encoding 10 6.4 PL packet timing10 6.5 Transmitt
6、er characteristics .11 6.5.1 Carrier modulation11 6.5.2 Waveform amplitude.11 6.5.3 Device coupling12 6.5.4 Single phase coupling.12 6.5.5 Multiple phase coupling 12 6.6 Receiver characteristics .13 6.6.1 Receive mode effective input impedance .13 6.6.2 Receiver performance.14 6.6.3 Receiving on a q
7、uiet line.15 6.6.4 Receiving with interference.16 6.6.5 Receiving through a distorted channel.17 6.6.6 Receiving with impulsive noise17 Bibliography .19 Figures Figure 1 Relationship of CNP 3 specification to the CNP 1 specification model6 Figure 2 Power line packet format .10 Figure 3 11-bit word f
8、ormat .10 Figure 4 Test circuit for determining transmit amplitude12 14908-3 ISO/IEC:2012 (E) - 3 - Figure 5 Test circuit for determining effective receiver impedance.14 Figure 6 Test circuit for receiver performance 15 Figure 7 Graph of tone interference specification .16 Tables Table 1 Transceiver
9、 timing specifications.11 Table 2 Settings for receive performance with interfering tone test17 - 4 - 14908-3 ISO/IEC:2012 (E) Foreword ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwide standardi
10、zation. National bodies that are members of ISO or IEC participate in the development of International Standards through technical committees established by the respective organization to deal with particular fields of technical activity. ISO and IEC technical committees collaborate in fields of mut
11、ual interest. Other international organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the work. In the field of information technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1. International Standards are drafted in accorda
12、nce with the rules given in the ISO/IEC Directives, Part 2. The main task of the joint technical committee is to prepare International Standards. Draft International Standards adopted by the joint technical committee are circulated to national bodies for voting. Publication as an International Stand
13、ard requires approval by at least 75 % of the national bodies casting a vote. ISO/IEC 14908-3 was prepared by CEN/TC 247 and was adopted, under a special “fast-track procedure”, by Joint Technical Committee ISO/IEC JTC 1, Information technology, in parallel with its approval by the national bodies o
14、f ISO and IEC. ISO/IEC 14908 consists of the following parts, under the general title Information technology Control network protocol: Part 1: Protocol stack Part 2: Twisted pair communication Part 3: Power line channel specification Part 4: IP communication 14908-3 ISO/IEC:2012 (E) - 5 - Introducti
15、on This part of ISO/IEC 14908 specifies the Control Network Power Line (PL) Channel and serves as a companion document to ISO/IEC 14908-1. 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
16、. This is one of a series of documents covering the various media that comprise the CNP standard. This part of ISO/IEC 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 s
17、pecific to the PL channel type, even though the parameters may be controlled at an OSI layer other than layer 1. This part of ISO/IEC 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. Th
18、is part of ISO/IEC 14908 has been prepared to provide mechanisms through which various vendors of local area control networks may exchange information in a standardised way. It defines communication capabilities. This part of ISO/IEC 14908 is used by all involved in design, manufacture, engineering,
19、 installation and commissioning activities and has been made in response to the essential requirements of the Constructive Products Directive. 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
20、 the scope of this specification in reference to the entire CNP model. In this International 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
21、media. Figure 1 Relationship of CNP 3 specification to the CNP 1 specification The International Organization for Standardization (ISO) and International Electrotechnical Commission (IEC) draw attention to the fact that it is claimed that compliance with this International Standard may involve the u
22、se of patents held by Echelon Corporation. The ISO and IEC take no position concerning the evidence, validity and scope of this patent right. The holder of this putative patent right has assured the ISO and IEC that they are willing to negotiate licences under reasonable and non-discriminatory terms
23、 and conditions with applicants throughout the world. In this respect, the statement of the holder of the putative patent rights is registered with the ISO and IEC. Information may be obtained from: Echelon Corporation, 4015 Meridian Avenue, San Jose, CA 94304, USA, phone +1-408- 938-5234, fax: +1-4
24、08-790-3800 http:/. Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of patent rights other than those identified above. ISO and IEC shall not be held responsible for identifying any or all such patent rights. - 6 - 14908-3 ISO/IEC:201
25、2 (E) 14908-3 ISO/IEC:2012 (E) - 7 - INFORMATION TECHNOLOGY CONTROL NETWORK PROTOCOL Part 3: Power line channel specification 1 Scope This International Standard specifies all the information necessary to facilitate the exchange of data and control information over the power line medium for networke
26、d control systems used in conjunction with ISO/IEC 14908-1. This International 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 exten
27、ded 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 International Standard, this part of ISO/IEC 14908 will prevail. 2 Normative referen
28、ces The following referenced documents are indispensable for the application 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. ISO/IEC 14908-1, Information technology Contr
29、ol network protocol Part 1: Protocol stack 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
30、for use in industrial environments 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO/IEC 14908-1 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 me
31、dium at a tap that meets the requirements of this specification 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 i
32、nstallations 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 - 8 - 14908-3 ISO/IEC:2012
33、 (E) 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 includ
34、ing 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 4 General description 4.1 Electrical safety This clause gives several recommendations relate
35、d to safety concerns with respect to this International 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 s
36、upplement national electrical codes and impose additional safety related requirements. Products conforming to this International Standard shall be designed, constructed, assembled, tested and installed following recognised safety provisions appropriate to products covered by the standard. Power line
37、 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 voltage
38、s 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, spec
39、ial measures should be taken to maintain the intended safety features during changes of an existing network. All wire and wiring to which nodes connect should conform to wiring standards of the appropriate national code for the country of intended use and should have been inspected to comply with th
40、at code. 4.2 Functional partitioning of PL specification This specification divides the complete power line environment into two basic parts: the powerline medium and the node physical access specification. 14908-3 ISO/IEC:2012 (E) - 9 - The medium specification concerns the capabilities and propert
41、ies of the physical medium. This encompasses such items as its bandwidth, frequency allocation, electrical and physical specifications, connectors etc. The node physical access specification deals with the physical properties of that part of the node that makes contact with the medium. Also describe
42、d is the interface between the physical layer and the symbol-encoding sub-layer. 5 Power Line Medium specifications 5.1 Power The nodes should not rely on the line frequency for timing or synchronisation to perform communications. AC power may be used to power the interface and application needs of
43、a node. 5.2 Data channel The channel occupies bandwidth from 125 kHz to 140 kHz frequency band, as defined in EN 50065-1, as a Binary Phase Shift Keyed (BPSK) modulated carrier. This channel is used to send protocol messages containing control, status, configuration and diagnostic information. The r
44、ules established in the CNP Medium Access Control (MAC) Layers and above shall be followed. The signalling characteristics of the channel are described in Clause 6. 5.3 Physical and electrical specifications Physical and electrical specifications for the PL medium are not formally given in this Inte
45、rnational Standard since: 1) the PL medium is assumed to already exist in any environment using power line communications and; 2) this specification lacks control over the installation of the power line medium, its physical properties, topology, or other devices connected to the medium. 5.4 Connecto
46、rs and coupling If a connector is used to attach a CNP node to the power line network (as opposed to a direct connection), then the connector shall meet the following requirements: the connector shall impose a negligible signal loss (less than 0,1 dB) from the power line network and the attached nod
47、e; the connector shall not impose any signal or voltage loss (greater than 0,1 dB) to the power line network (with or without a node connected to the connector). Single-phase power line node connectors are assumed to fit standard electrical outlets appropriate for the country of use and may or may n
48、ot include a connection to the protective conductor of such outlets if present. Signalling shall only be between phase and neutral conductors and no functional connection shall be made to the protective conductor. Multi-phase powerline nodes may use any of the connection schemes given in EN 50065-1
49、permitting signalling between all phases simultaneously and the neutral conductor or between any of the phase conductors individually and the neutral conductor. No functional connection shall be made to the protective conductor. 5.5 Signal coupling between phases Signal coupling between phases in multi-phase installations may be achieved by using phase couplers according to EN 50065-4-1. - 10 - 14908-3 ISO/IEC:2012 (E) 5.6 Surge protection and related devices Certain surge protecti
