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 <title><![CDATA[新手请教关于PNP与NPN转换电路如何实现？]]></title>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1478998.html]]></link>
 <description><![CDATA[Latest 50 replies of 新手请教关于PNP与NPN转换电路如何实现？]]></description>
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 <description><![CDATA[工控人家园]]></description>
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 <title><![CDATA[]]></title>
 <description><![CDATA[利用上下拉电阻，PLC点取反。]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1478998#1646082.html]]></link>
 <author><![CDATA[ntyuhaijun]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Mon, 23 Feb 2015 07:01:44 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[[s:21] 3楼赞1个]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1478998#1646057.html]]></link>
 <author><![CDATA[sanlihu]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Mon, 23 Feb 2015 01:06:46 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[利用上拉电阻和下拉电阻即可以实现，不过他们的触点方式换成常闭的]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1478998#1646027.html]]></link>
 <author><![CDATA[liujian-weng]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sun, 22 Feb 2015 07:48:09 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[8楼兄弟 给个详解呗]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1478998#1646010.html]]></link>
 <author><![CDATA[ddn667]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sat, 21 Feb 2015 14:43:19 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[用电阻上拉或下拉电平]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1478998#1644663.html]]></link>
 <author><![CDATA[821937642]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sun, 08 Feb 2015 00:08:05 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[我觉得，用MR型的，由com1开始原来是接0V的都改成+24V，反之原来接+24V的改成0V就好了吧
 [s:21]]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1478998#1644662.html]]></link>
 <author><![CDATA[cheng007297]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sun, 08 Feb 2015 00:06:08 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[一个电阻搞定]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1478998#1644646.html]]></link>
 <author><![CDATA[tkggtdkjpl]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sat, 07 Feb 2015 15:04:12 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[说通俗一点,NPN就是输出的信号与输入是相反的,给高信号,输出为低,给低信号,输出为高.PNP与此相反.详细的找一本晶体三极管的书看一看]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1478998#1644616.html]]></link>
 <author><![CDATA[新手驾驶f22]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sat, 07 Feb 2015 12:33:13 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[用小继电器做中间转换就可以了]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1478998#1644594.html]]></link>
 <author><![CDATA[国宇8366]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sat, 07 Feb 2015 11:18:55 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[[quote]引用第2楼jimmy李于2015-02-07 17:23发表的&nbsp;&nbsp;:
怎么转换法？我刚接触PLC这块，好多都不懂的
[/quote]
比如光电是NPN型的，输出是负极，PNP型输出是正极，那就利用他们输出去控制小型继电器线圈，继电器的常开/常闭点切换输入或者输出]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1478998#1644575.html]]></link>
 <author><![CDATA[忍缘善]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sat, 07 Feb 2015 09:41:50 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[怎么转换法？我刚接触PLC这块，好多都不懂的]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1478998#1644566.html]]></link>
 <author><![CDATA[jimmy李]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sat, 07 Feb 2015 09:23:41 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[可以借助小型继电器动作进行PNP或者NPN输入和输出转换完成]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1478998#1644565.html]]></link>
 <author><![CDATA[忍缘善]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sat, 07 Feb 2015 09:20:08 +0000]]></pubdate>
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