BS EN 1434-3:2015规定了一般要求，并适用于热量表。热量表是 用于测量热交换回路中被吸收（冷却）的能量的仪器 或者被一种叫做热输送液体的液体放弃（加热）。表上显示的是法定温度 单位。第3部分规定了仪表和读出装置（点/点）之间的数据交换 沟通）。对于使用光学读出头的这些应用，需要使用EN 62056-21协议 推荐。对于通过电池驱动的读出装置直接或远程本地读出单个或几米 建议使用EN 13757-6（本地总线）的物理层。对于高达250米的大型网络，根据EN 13757配备交流电源的主设备- 2是控制M总线所必需的。对于这些应用，EN 13757-2的物理层和链路层 并且需要EN 13757-3的应用层。对于无线电表通信，EN 13757-4描述了步行/驾车的几种替代方案 通过移动站或使用固定接收器或网络进行读数。单向和 本标准支持双向传输仪表。交叉引用:EN 13757-2EN 13757-3:2013EN 13757-4EN 13757-6EN 62056-21:2002IEC 62056-21:2002EN 13757-1EN 13757-5购买本文件时可获得的所有现行修订均包含在购买本文件中。

BS EN 1434-3:2015 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.Cross References:EN 13757-2EN 13757-3:2013EN 13757-4EN 13757-6EN 62056-21:2002IEC 62056-21:2002EN 13757-1EN 13757-5All current amendments available at time of purchase are included with the purchase of this document.