关于数字I/O模块的有用信息以及用法
40-412的回读操作速度
关于确定输入状态时40-412的回读速度的一些指导信息
使用数字I/O驱动外部负载
一些设备采用数字I/O来驱动比如继电器线圈等外部负载
驱动感性负载
驱动感性负载时小心避免EMC问题
采用数字I/O来保护
可以采用数字I/O来保护在有直接接电源或接地的应用中继电器免于意外的过载影响
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