Heat meters - Part 3: Data exchange and interfaces
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.
ΚΩΔΙΚΟΣ ΠΡΟΪΟΝΤΟΣ:
CYS EN 1434-3:2015
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.