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Heat meters - Part 3: Data exchange and interfaces
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Published date: 02-12-2015
Publisher: Comite Europeen de Normalisation
European foreword1 Scope2 Normative references3 Meter interfaces and protocols overview4 Physical layer5 Link layer6 Application layer7 ApplicationAnnex A (informative) - Recommendation for heat meter test interfaceAnnex B (informative) - Additional information for heat metersAnnex C (informative) - Automatic protocol detection and wake-up for the optical interfaceAnnex D (informative) - Usage of heat meters in control applicationsAnnex E (informative) - Protection techniques for M-Bus meters against surge/lightningAnnex F (informative) - Additional information about the master-unit for the M-BusBibliography
This European Standard specifies the general requirements and applies to heat meters. Heat 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 heat in legal units.Part 3 specifies the data exchange between a meter and a readout device (POINT / POINT communication). For these applications using the optical readout head, the EN 62056-21 protocol is recommended.For direct or remote local readout of a single or a few meters via a battery driven readout device, the physical layer of EN 13757-6 (local bus) is recommended.For bigger networks with up to 250 meters, a master unit with AC mains supply according to EN 13757-2 is necessary to control the M-Bus. For these applications the physical and link layer of EN 13757-2 and the application layer of EN 13757-3 is required.For wireless meter communications, EN 13757-4 describes several alternatives of walk/drive-by readout via a mobile station or by using stationary receivers or a network. Both unidirectionally and bidirectionally transmitting meters are supported by this standard.
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