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 <title><![CDATA[请教PLC输入问题]]></title>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-23850.html]]></link>
 <description><![CDATA[Latest 50 replies of 请教PLC输入问题]]></description>
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 <title><![CDATA[工控人家园]]></title>
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<item>
 <title><![CDATA[]]></title>
 <description><![CDATA[你把COM端和输入端接通就是开关了...]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-23850#343737.html]]></link>
 <author><![CDATA[逍遥]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Thu, 30 Oct 2008 10:29:03 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[如果将24V开关信号（即通－断）直接接入PLC（不通过NPN三级管）是否可以呢？]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-23850#343107.html]]></link>
 <author><![CDATA[myzxk]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Thu, 30 Oct 2008 00:29:38 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[谢谢大家给予的回答。]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-23850#343101.html]]></link>
 <author><![CDATA[myzxk]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Thu, 30 Oct 2008 00:27:26 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[伙记，慢慢来
路长着呢]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-23850#342874.html]]></link>
 <author><![CDATA[段俊]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Wed, 29 Oct 2008 14:32:25 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[输入信号的用法很多&nbsp;&nbsp;慢慢会知道的]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-23850#342396.html]]></link>
 <author><![CDATA[nbwrk]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Wed, 29 Oct 2008 07:40:14 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[X0-X3（具体赫兹要看硬件说明）可以接受脉冲信号，只能接受DC24V信号，双极性输入可以接受NPN或PNP信号。 [s:21]]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-23850#342088.html]]></link>
 <author><![CDATA[bartell]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Wed, 29 Oct 2008 02:19:37 +0000]]></pubdate>
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