运动控制卡输入/输出端口

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选择匿名的用户   2021-5-30 16:16   512   0
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  <p><span style="font-family:&#39;宋体&#39;;line-height:28px;text-indent:20px;font-size:16px;">一.控制卡输出信号的输出与隔离</span><span lang="en-us" style="font-family:&#39;宋体&#39;;line-height:28px;text-indent:20px;font-size:16px;"><br></span><span style="font-family:&#39;宋体&#39;;line-height:28px;text-indent:20px;font-size:16px;">控制卡为数字电路,其上的芯片多为</span><span lang="en-us" style="font-family:&#39;宋体&#39;;line-height:28px;text-indent:20px;font-size:16px;">5V</span><span style="font-family:&#39;宋体&#39;;line-height:28px;text-indent:20px;font-size:16px;">直流电源供电,与</span><span lang="en-us" style="font-family:&#39;宋体&#39;;line-height:28px;text-indent:20px;font-size:16px;">TTL</span><span style="font-family:&#39;宋体&#39;;line-height:28px;text-indent:20px;font-size:16px;">电平兼容。而自动化系统中大多数输入</span><span lang="en-us" style="font-family:&#39;宋体&#39;;line-height:28px;text-indent:20px;font-size:16px;">/</span><span style="font-family:&#39;宋体&#39;;line-height:28px;text-indent:20px;font-size:16px;">输出元件如:继电器、指示灯、电磁阀、触摸屏、传感器等,多为</span><span lang="en-us" style="font-family:&#39;宋体&#39;;line-height:28px;text-indent:20px;font-size:16px;">24V</span><span style="font-family:&#39;宋体&#39;;line-height:28px;text-indent:20px;font-size:16px;">直流电源供电,以满足其驱动功率的需要。</span><span lang="en-us" style="font-family:&#39;宋体&#39;;line-height:28px;text-indent:20px;font-size:16px;"><br></span><span style="font-family:&#39;宋体&#39;;line-height:28px;text-indent:20px;font-size:16px;">控制卡的输出端口的作用就是要在</span><span lang="en-us" style="font-family:&#39;宋体&#39;;line-height:28px;text-indent:20px;font-size:16px;">5V</span><span style="font-family:&#39;宋体&#39;;line-height:28px;text-indent:20px;font-size:16px;">与</span><span lang="en-us" style="font-family:&#39;宋体&#39;;line-height:28px;text-indent:20px;font-size:16px;">24V</span><span style="font-family:&#39;宋体&#39;;line-height:28px;text-indent:20px;font-size:16px;">两种电源电路之间搭建一个桥梁,完成信号放大、隔离外部干扰的功能。</span><span lang="en-us" style="font-family:&#39;宋体&#39;;line-height:28px;text-indent:20px;font-size:16px;"><br><br>TTL</span><span style="font-family:&#39;宋体&#39;;line-height:28px;text-indent:20px;font-size:16px;">电平(</span><span lang="en-us" style="font-family:&#39;宋体&#39;;line-height:28px;text-indent:20px;font-size:16px;">Transistor-Transistor Logic</span><span style="font-family:&#39;宋体&#39;;line-height:28px;text-indent:20px;font-size:16px;">晶体管</span><span lang="en-us" style="font-family:&#39;宋体&#39;;line-height:28px;text-indent:20px;font-size:16px;">-</span><span style="font-family:&#39;宋体&#39;;line-height:28px;text-indent:20px;font-size:16px;">晶体管逻辑电平)信号表示二进制的方法:</span><span lang="en-us" style="font-family:&#39;宋体&#39;;line-height:28px;text-indent:20px;font-size:16px;"><br></span><span style="font-family:&#39;宋体&#39;;line-height:28px;text-indent:20px;font-size:16px;">高电平:</span><span lang="en-us" style="font-family:&#39;宋体&#39;;line-height:28px;text-indent:20px;font-size:16px;">&#43;2.4</span><span style="font-family:&#39;宋体&#39;;line-height:28px;text-indent:20px;font-size:16px;">~</span><span lang="en-us" style="font-family:&#39;宋体&#39;;line-height:28px;text-indent:20px;font-size:16px;">5 V </span><span style="font-family:&#39;宋体&#39;;line-height:28px;text-indent:20px;font-size:16px;">为逻辑</span><span lang="en-us" style="font-family:&#39;宋体&#39;;line-height:28px;text-indent:20px;font-size:16px;">&#34;1&#34;</span><span style="font-family:&#39;宋体&#39;;line-height:28px;text-indent:20px;font-size:16px;">,</span><span lang="en-us" style="font-family:&#39;宋体&#39;;line-height:28px;text-indent:20px;font-size:16px;"><br></span><span style="font-family:&#39;宋体&#39;;line-height:28px;text-indent:20px;font-size:16px;">低电平:</span><span lang="en-us" style="font-family:&#39;宋体&#39;;line-height:28px;text-indent:20px;font-size:16px;">0</span><span style="font-family:&#39;宋体&#39;;line-height:28px;text-indent:20px;font-size:16px;">~</span><span lang="en-us" style="font-family:&#39;宋体&#39;;line-height:28px;text-indent:20px;font-size:16px;">&#43;0.4 V </span><span style="font-family:&#39;宋体&#39;;line-height:28px;text-indent:20px;font-size:16px;">为逻辑</span><span lang="en-us" style="font-family:&#39;宋体&#39;;line-height:28px;text-indent:20px;font-size:16px;">&#34;0&#34;</span><span style="font-family:&#39;宋体&#39;;line-height:28px;text-indent:20px;font-size:16px;">。</span><span lang="en-us" style="font-family:&#39;宋体&#39;;line-height:28px;text-indent:20px;font-size:16px;"><br></span><span style="font-family:&#39;宋体&#39;;line-height:28px;text-indent:20px;font-size:16px;">集电极开路输出</span><span lang="en-us" style="font-family:&#39;宋体&#39;;line-height:28px;text-indent:20px;font-size:16px;"><br></span><span style="font-family:&#39;宋体&#39;;line-height:28px;text-indent:20px;font-size:16px;">这种
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