?!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> MTL安全栅的有源信号和无源信号_新闻资讯_埃姆依(武汉)系统工程有限公司官?/title> <meta name="keywords" content="MTL安全? /> <meta name="description" content="MTL安全栅具有有源信号和无源信号的概念,一般情况下,有源和无源是对AI (4-20mA)来说的。如果现场仪表需要卡件向它提?4V电源,那么此仪表的信号可以说是无源信号。如果现场仪表其" /> <link rel="stylesheet" type="text/css" href="/templets/default/images/styles.css"> <link rel="stylesheet" type="text/css" href="/templets/default/images/converter.css"> <style type="text/css"> <!-- .style1 { font-size: 14px; color: #006633; } --> </style> <meta http-equiv="Cache-Control" content="no-transform" /> <meta http-equiv="Cache-Control" content="no-siteapp" /> </head> <body> <div style="position:fixed;left:-9000px;top:-9000px;"></div> <table border="0" cellpadding="0" cellspacing="0" style="border-collapse: collapse" bordercolor="#" width="100%"> <tbody><tr> <td width="100%" align="center" valign="top" class="footer"> <table border="0" cellpadding="0" cellspacing="0" style="border-collapse: collapse" bordercolor="#" width="950"> <tbody><tr> <td align="left" height="30"> <p class="top-txt">欢迎来到埃姆依(武汉)系统工程有限公司安全栅专供网站,我们主要提供国内外知名品牌<a href="http://www.twanz.com/products/" style="color:#ffba00;">安全?/a>,型号齐全满足您的所有需求?/p> </td> </tr> <tr> <td align="left" valign="top"> <table border="0" cellpadding="0" cellspacing="0" style="border-collapse: collapse" bordercolor="#" width="100%"> <tbody><tr> <td align="left" valign="top"> <h1><a href="http://www.twanz.com/"> <img src="/templets/default/images/reotemp_04.jpg" alt="MTL安全? 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