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 <title><![CDATA[光电开关怎么用？]]></title>
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 <description><![CDATA[Latest 50 replies of 光电开关怎么用？]]></description>
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 <description><![CDATA[也可说是除了2条控制线了，另外一条接负载（窜在负载上就可以了？）另外我只要一个发射光电开关，可不可以用一个可以反射物体代替？比如镜子?]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1374948#1262828.html]]></link>
 <author><![CDATA[林423]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Tue, 08 May 2012 11:09:28 +0000]]></pubdate>
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 <description><![CDATA[什么型号的呢？有的有五线，两供电，剩下三是常开常闭]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1374948#1261850.html]]></link>
 <author><![CDATA[wananjushi]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Mon, 07 May 2012 05:29:56 +0000]]></pubdate>
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 <description><![CDATA[棕色的（茶色）电源+24V，蓝色的-OV，黑色的NPN输出线（即负输出的），白色线PNP输出线（即正输出的）]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1374948#1261704.html]]></link>
 <author><![CDATA[wei0212007]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Mon, 07 May 2012 02:45:24 +0000]]></pubdate>
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 <link><![CDATA[http://www.ymmfa.com/read-gktid-1374948#1261691.html]]></link>
 <author><![CDATA[libin520]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Mon, 07 May 2012 02:32:00 +0000]]></pubdate>
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 <author><![CDATA[libin520]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Mon, 07 May 2012 02:27:45 +0000]]></pubdate>
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 <link><![CDATA[http://www.ymmfa.com/read-gktid-1374948#1261684.html]]></link>
 <author><![CDATA[libin520]]></author>
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 <pubdate><![CDATA[Mon, 07 May 2012 02:22:06 +0000]]></pubdate>
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 <link><![CDATA[http://www.ymmfa.com/read-gktid-1374948#1261682.html]]></link>
 <author><![CDATA[libin520]]></author>
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 <pubdate><![CDATA[Mon, 07 May 2012 02:19:49 +0000]]></pubdate>
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 <link><![CDATA[http://www.ymmfa.com/read-gktid-1374948#1261679.html]]></link>
 <author><![CDATA[libin520]]></author>
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 <pubdate><![CDATA[Mon, 07 May 2012 02:16:24 +0000]]></pubdate>
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 <description><![CDATA[7楼说的清楚]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1374948#1261678.html]]></link>
 <author><![CDATA[lxc429390625]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Mon, 07 May 2012 02:12:43 +0000]]></pubdate>
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 <description><![CDATA[两根线的是接电源、三根线的其中两根电源，一根信号输出。具体接哪根线是接什么你要上传光电开关标的说明才清楚…]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1374948#1261654.html]]></link>
 <author><![CDATA[huhu]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Mon, 07 May 2012 01:40:59 +0000]]></pubdate>
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 <description><![CDATA[看看开关上的标签你就明白了。]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1374948#1261635.html]]></link>
 <author><![CDATA[北方]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Mon, 07 May 2012 01:16:43 +0000]]></pubdate>
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 <description><![CDATA[光电开关有多种，24V，220V的，五线可能是两根接电，三根是控制的，BN和BU接电。]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1374948#1261444.html]]></link>
 <author><![CDATA[qiuluhua]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sun, 06 May 2012 12:23:14 +0000]]></pubdate>
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 <description><![CDATA[看说明书哇]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1374948#1261402.html]]></link>
 <author><![CDATA[tjzhmjj]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sun, 06 May 2012 11:25:08 +0000]]></pubdate>
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 <description><![CDATA[没有说清楚问题?咋回答你]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1374948#1261383.html]]></link>
 <author><![CDATA[hbsw613]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sun, 06 May 2012 11:00:26 +0000]]></pubdate>
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 <description><![CDATA[接收是2条&nbsp;&nbsp;发丝3条&nbsp;&nbsp; 不知道这5条怎么接线]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1374948#1261382.html]]></link>
 <author><![CDATA[林423]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sun, 06 May 2012 11:00:25 +0000]]></pubdate>
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 <description><![CDATA[几个接线端？]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1374948#1261368.html]]></link>
 <author><![CDATA[cyc2012]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sun, 06 May 2012 10:44:24 +0000]]></pubdate>
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