MTL隔离栅是一种安全场所的本安防爆关联设备,其防护性能体现在当电路发生故障时,限制危险电压和电流浸入我先去,保护现场设备和人员的安全。MTL隔离栅的基本限能电路有三种,限限流电路、限压电路、快速熔断器。这里将其原理简单给大家介绍一下。快速熔断器:防止因长时间流过的电流太大,烧断限压电路上的限压管。当超过安全限压值的电压加在回路上时,限压管导通,流经限压管的电流迅速增加,如果没有快速熔断器限制电流,最终将烧断限压管,使回路限压失去作用。限压电路:当回路电压接近安全限压值时,限压管导通放电,使限压管两端的电压始终保持在安全限压值以下。限流电路:由电路和晶体管组成,当电压被限制后,适当选择限流电路,即可将回路电流限制在安全值以下。目前比较常见MTL隔离栅种类有:模拟量输入式隔离安全栅(MTL4041B),模拟量输出(MTL.4045C);(MTL3052);内部可以组态的MTL4073为智能温度变送器等。输入和输出MTL隔离栅,属于单回路的输入和输出,接线图比较明确。不用赘述。温度隔离式安全栅工作原理是每个MTL831可以连接16路热电偶信号,每个MTL838可以连接2MTL831。MLT831和M TL838之间通过两对冗余的电缆进行数据传送,MTL838通过MODBUS协议同DCS进行通讯。每个DCS通讯卡(ALR121)可以连接31个MTL838,因此最多可连接992个热电偶。MTL隔离栅在采用快速切断,限流,限压等措施基础上,还实现了电源,输入信号与输出信号的安全隔离。增强了系统的干扰能力,提高了系统正常运行的可靠性。http://www.safety-barrier.net/电话:027-87263542手机:18372021864ABSolute;top:0;border:0;width:undefinedpx;height:undefinedpx;" SANdbox="allow-forms allow-popUPS allow-popups-to-escape-sandbox allow-same-origin allow-scripts allow-top-navigation-by-user-activation" frameborder="0" src="https://googleads.g.doubleclick.net/pagead/ads?guci=2.2.0.0.2.2.0.0&client=ca-pub-6745515041074118&ouTPUt=html&adk=1812271804&adf=3279755396&plat=1%3A8%2C2%3A8%2C8%3A134217728%2C9%3A134250504%2C16%3A8388608%2C17%3A32%2C24%3A32%2C25%3A32%2C30%3A1048576%2C32%3A32&format=0x0&url=https%3A%2F%2Fwww.bizrobot.com%2Fcompany_bloginfo.php%3Fact%3D1&ea=0&flash=29.0.0&pra=5&wgl=1&dt=1614047027051&bpp=7&bdt=288&idt=135&shv=r20210217&cbv=r20190131&ptt=9&saldr=aa&cookie=ID%3Da07b3c4ba002eaff-22ed306a0ec40076%3AT%3D1602729171%3ART%3D1602729171%3AS%3DALNI_MbBh5yg2uKd0UtH0u1Ylcdyq42wTg&nras=1&correlator=6330567279656&frm=23&ife=1&pv=2&ga_vid=1376613668.1614047027&ga_sid=1614047027&ga_hid=2127201367&ga_fc=0&nhd=1&u_tz=480&u_his=5&u_java=0&u_h=1080&u_w=1920&u_ah=1030&u_aw=1920&u_cd=24&u_nplug=14&u_nmime=31&adx=-12245933&ady=-12245933&biw=831&bih=584&isw=730&ish=360&ifk=2699508910&scr_x=0&scr_y=0&eid=44736525%2C21068769%2C21068893&oid=3&pvsid=3807290681845481&pem=217&ref=https%3A%2F%2Fwww.bizrobot.com%2Fcompany_bloginfo.php&rx=0&eae=2&fc=1920&brdim=604%2C0%2C604%2C0%2C1920%2C0%2C1312%2C1030%2C730%2C360&vis=1&rsz=%7C%7Cs%7C&abl=NS&fu=9228&bc=31&ifi=1&uci=1.1t1k5gassr5e&fsb=1&dtd=209" marginwidth="0" marginheight="0" vspace="0" hspace="0" allowtransparency="true" scrolling="no" allowfullscreen="true" data-google-container-id="1.1t1k5gassr5e" data-load-complete="true"> |