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 <title><![CDATA[请大神们帮忙看看]]></title>
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 <description><![CDATA[我看了一下，SW1是个选择开关，往H端是公用正电源+24伏，往L端是公用负电源-24伏。]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1527533#1692238.html]]></link>
 <author><![CDATA[1921706799]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sun, 23 Aug 2015 14:05:02 +0000]]></pubdate>
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 <title><![CDATA[]]></title>
 <description><![CDATA[High和Low是高低的意思
SW1在H档，输入I点为高电位，COM为低电位，电流从I点流进，COM点流出]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1527533#1692181.html]]></link>
 <author><![CDATA[sanlihu]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sun, 23 Aug 2015 08:00:09 +0000]]></pubdate>
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 <description><![CDATA[接PNP传感器一般选择H，接NPN传感器一般选择L，不知道对不对？]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1527533#1692165.html]]></link>
 <author><![CDATA[tingfenghu]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sun, 23 Aug 2015 05:05:41 +0000]]></pubdate>
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 <description><![CDATA[就是输入信号转换，是选择源型输入还是漏型输入。
即输入端是电源负极还是正极的转换。]]></description>
 <link><![CDATA[http://www.ymmfa.com/read-gktid-1527533#1692153.html]]></link>
 <author><![CDATA[雪花飘飘]]></author>
 <category><![CDATA[综合讨论]]></category>
 <pubdate><![CDATA[Sun, 23 Aug 2015 03:20:13 +0000]]></pubdate>
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