每一项的前三个数字分别指 SCSI 总线、设备标识和 LUN（逻辑单元号，Logical Unit Number）。

The first three numbers for each item refer to SCSI bus, device ID, and LUN (Logical Unit Number), respectively.

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数据记录单元完成数据采集，把信号源发送的模拟量数据、并行和串行数字量数据、并行和串行图形数据记录到存储设备的CF卡上。

Data record unit complete data acquisition, which records analog quantity data, parallel and serial digital data, parallel and serial graphic data from the signal source to CF card.

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国际标准IEC60044-7/8规定了电子式互感器和二次设备的数字接口，首先提出了合并单元的定义。

IEC60044-7/8 prescribes that merging unit is the digital interface of electronic transducer and secondary equipment.

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