DIN EN 62056-62-2007 电量测量.仪表读数、收费和负载控制的数据交换.第62部分:接口分级(IEC 62056-62-2002)
Electricity metering - Data exchange for meter reading, tariff and load control - Part 62: Interface classes (IEC 62056-62:2006); German version EN 62056-62:2007, text in English