本卡不但具有四路同步A/D转换功能，而且还具有两路D/A输出功能和八路数字量输入输出功能。

This card not only has the function of four-channel simultaneous sampling, but also has two channels for D/A, eight channels for digital I/O.

youdao

本文还对汇流条控制器的模拟量输入通道、数字量输入通道、数字量输出通道进行了自检测设计，包括硬件BIT设计和软件实现方法。

The built-in test (BIT) design of hardware and software is also introduced in this dissertation. The BIT design consists of analog inputs, digital inputs and digital outputs.

youdao

系统的硬件采样部分由数据采集模块(包括模拟量输入模块和数字量输入模块)构成，各模块间以RS - 485总线形式进行连接。

The hardware sampling unit of the monitor system is constituted by the data gathering module, including digital input module and analog input module, which are connected by the RS-485 main line form.

youdao