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 <title><![CDATA[PLC为PNP的输出脉冲如何与NPN型的驱动器连 ..]]></title>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1436628.html]]></link>
 <description><![CDATA[Latest 50 replies of PLC为PNP的输出脉冲如何与NPN型的驱动器连 ..]]></description>
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 <title><![CDATA[]]></title>
 <description><![CDATA[学习了]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1436628#1484592.html]]></link>
 <author><![CDATA[接近开关厂家]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Tue, 10 Sep 2013 01:34:02 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[中间继电器输出脉冲简直有点骇人听闻啊.
光耦应当可行,也可以用NPN三极管来倒下相,PNP输出接基极,集电极接NPN输入,至于抗干扰问题,从排列步线和屏蔽上想想办法吧.]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1436628#1484584.html]]></link>
 <author><![CDATA[jzzjzq]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Tue, 10 Sep 2013 01:20:56 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[用光耦最好的，简单便宜]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1436628#1484441.html]]></link>
 <author><![CDATA[cheng007297]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Mon, 09 Sep 2013 11:32:44 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[继电器转接没有这么高响应]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1436628#1484421.html]]></link>
 <author><![CDATA[shuai3982]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Mon, 09 Sep 2013 10:40:38 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[楼主这样的问题我也碰到过&nbsp;&nbsp;&nbsp;&nbsp; 我用的是西门子s7200-cpu224的plc&nbsp;&nbsp;&nbsp;&nbsp;伺服是三洋的&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;（也就是跟楼主说的一样的&nbsp;&nbsp;&nbsp;&nbsp;plc输出是PNP 
 而伺服只能接收 NPN的脉冲信号）&nbsp;&nbsp;当时我也是用的一个光耦 转换的&nbsp;&nbsp; ..]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1436628#1484413.html]]></link>
 <author><![CDATA[xidde]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Mon, 09 Sep 2013 09:33:50 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[楼主用的什么驱动器居然只能是NPN输入？一般的驱动器脉冲输入信号都是差分输入的，单端输入NPN、PNP均可，要是只有NPN的话就需要转换了，用高速光耦麻烦的话就用ULN2003转换一下也行 [s:21]]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1436628#1484235.html]]></link>
 <author><![CDATA[回忆依然最美]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Mon, 09 Sep 2013 02:12:17 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[1楼真有才！]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1436628#1484221.html]]></link>
 <author><![CDATA[琴岛工控]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Mon, 09 Sep 2013 01:59:59 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[一楼的方法试过吗？不要想当然的回答，脉冲输出居然用继电器转接？不要误导初学者呀！高速光耦正解。]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1436628#1483978.html]]></link>
 <author><![CDATA[xumadc]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sun, 08 Sep 2013 03:48:24 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[用高速光耦转换]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1436628#1483960.html]]></link>
 <author><![CDATA[陈大围]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sun, 08 Sep 2013 02:26:18 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[楼上都看清楚了&nbsp;&nbsp;LZ说的是脉冲输出 ，继电器能有这么高的应答频率？我建议更改PLC接线或驱动器接线，实在不行就需要用光耦合器转换了，用继电器是绝对不行的，要不选PLC怎么不选继电器的？ [s:32]]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1436628#1483951.html]]></link>
 <author><![CDATA[jun888006]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sun, 08 Sep 2013 01:39:35 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[其实NPN和PNP输出就是低电平和高电平的问题！一楼的方法完全可以，我以前就是这样做的！接线方式，也很简单！]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1436628#1483919.html]]></link>
 <author><![CDATA[王志勇爱媳妇]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sun, 08 Sep 2013 01:01:59 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[可直接连接]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1436628#1483916.html]]></link>
 <author><![CDATA[bkkman]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sun, 08 Sep 2013 00:52:18 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[用继电器频率低，用光偶成本高，不能直接联么？]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1436628#1483913.html]]></link>
 <author><![CDATA[sanlihu]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sun, 08 Sep 2013 00:19:41 +0000]]></pubdate>
</item>
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 <title><![CDATA[]]></title>
 <description><![CDATA[用光偶]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1436628#1483908.html]]></link>
 <author><![CDATA[crgtom]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sat, 07 Sep 2013 22:57:15 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[一楼，正解！]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1436628#1483907.html]]></link>
 <author><![CDATA[zhaodong000]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sat, 07 Sep 2013 22:51:19 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[加中间继电器,用输出脉冲控制继电器，再用继电器来控制驱动器。]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1436628#1483883.html]]></link>
 <author><![CDATA[改变自己东]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sat, 07 Sep 2013 15:51:01 +0000]]></pubdate>
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