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 <title><![CDATA[PNP传感器如何改成NPN传感器]]></title>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-96334.html]]></link>
 <description><![CDATA[Latest 50 replies of PNP传感器如何改成NPN传感器]]></description>
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 <description><![CDATA[[s:28] 有人有更详细点的原理么？来点有用的！]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-96334#978709.html]]></link>
 <author><![CDATA[zhangli019]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Fri, 25 Feb 2011 11:55:26 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[请问加继电器要怎么接线？]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-96334#978688.html]]></link>
 <author><![CDATA[宁伟涛]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Fri, 25 Feb 2011 11:38:37 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[用继电器来转换比较好些]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-96334#975233.html]]></link>
 <author><![CDATA[huangyue]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Mon, 21 Feb 2011 02:12:32 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[加继电器转换。有的传感器上面有切换开关。]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-96334#975231.html]]></link>
 <author><![CDATA[杨康]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Mon, 21 Feb 2011 02:04:44 +0000]]></pubdate>
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 <description><![CDATA[直接改电路就要和上面一样改换电子电路，不那样的话就加中继转换，不过有些场合NPN的也能用PNP的。]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-96334#974989.html]]></link>
 <author><![CDATA[子丑寅卯9]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sun, 20 Feb 2011 12:44:47 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[简单点加个1.5K-2K的电阻，然后信号取反就可以了]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-96334#974939.html]]></link>
 <author><![CDATA[冰糖]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sun, 20 Feb 2011 11:36:35 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[加個光耦就可以了,例如PC817&nbsp;&nbsp;一個約一塊錢.]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-96334#974908.html]]></link>
 <author><![CDATA[mcl66666]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sun, 20 Feb 2011 10:25:38 +0000]]></pubdate>
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 <description><![CDATA[PNP是输出高电位
NPN是输出低电位

回复楼主：PNP传感器不能改作NPN传感器
但是
某些原使用PNP传感器的场合，可以通过改变接线或过度转换线路，而改用NPN传感器
如何改
需要根据你所接触的实际情形
好多PLC直接就有预设这个PNP与NPN输入的互换功能]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-96334#974886.html]]></link>
 <author><![CDATA[detect]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sun, 20 Feb 2011 09:30:25 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[学习了 [s:21]]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-96334#974880.html]]></link>
 <author><![CDATA[山东滕州]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sun, 20 Feb 2011 09:18:57 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[PNP是输出高电位
NPN是输出低电位
将输出线用继电器NC和NO切换一下即可]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-96334#974873.html]]></link>
 <author><![CDATA[roger_jiang]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sun, 20 Feb 2011 09:00:46 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[直接改是不行的，我一般加个继电器。]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-96334#974854.html]]></link>
 <author><![CDATA[hxl202319]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sun, 20 Feb 2011 08:19:27 +0000]]></pubdate>
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