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性(xing)能簡(jian)介(jie) 24V配電(dian)(dian)(dian)，頻率(lv)量輸入隔離柵，給危險(xian)區(qu)的(de)現場儀表提供隔離電(dian)(dian)(dian)源(yuan)(yuan)，危險(xian)區(qu)儀表產生(sheng)的(de)頻率(lv)信號通過(guo) 柵隔離傳輸到(dao)安全側輸出。輸入采用滯回比較(jiao)電(dian)(dian)(dian)路，具有較(jiao)高的(de)抗干擾性(xing)能。該產品需要(yao)獨立供電(dian)(dian)(dian)，電(dian)(dian)(dian)源(yuan)(yuan)、輸入和輸出三隔離。 主要(yao)技(ji)術參數 ? 供電(dian)(dian)(dian)電(dian)(dian)(dian)壓(ya)：20～35V,d.c. ? 電(dian)(dian)(dian)源(yuan)(yuan)保(bao)護：電(dian)(dian)(dian)源(yuan)(yuan)反(fan)向保(bao)護 ? 消耗電(dian)(dian)(dian)流（24V供電(dian)(dian)(dian)，20mA輸出時(shi)）： ≤70mA（SR4052-EX） ≤120m

性(xing)能(neng)(neng)簡介(jie) 12V配電，頻率量輸(shu)入隔(ge)(ge)離(li)柵，給危(wei)險(xian)區的(de)現場儀表提(ti)供(gong)隔(ge)(ge)離(li)電源(yuan)，危(wei)險(xian)區儀表產(chan)生的(de)頻率信(xin)號通(tong)過(guo) 柵隔(ge)(ge)離(li)傳(chuan)輸(shu)到安(an)全側輸(shu)出。輸(shu)入采用滯(zhi)回比(bi)較電路，具(ju)有較高的(de)抗干擾(rao)性(xing)能(neng)(neng)。該產(chan)品需要(yao)獨(du)立供(gong)電，電源(yuan)、輸(shu)入和輸(shu)出三隔(ge)(ge)離(li)。

頻(pin)率(lv)信(xin)(xin)號安(an)全柵(zha)NPEXA-C67/NPEXA-C677危險區允許輸入信(xin)(xin)號： 頻(pin)率(lv)信(xin)(xin)號輸入：高(gao)電(dian)(dian)(dian)(dian)平(ping)≥4V；低電(dian)(dian)(dian)(dian)平(ping)≤1V；頻(pin)率(lv)≤5kHz；幅值≤12V 現場儀表配電(dian)(dian)(dian)(dian)：電(dian)(dian)(dian)(dian)壓12V或24V，正常工作電(dian)(dian)(dian)(dian)流≤25 mA 向安(an)全區輸出信(xin)(xin)號： 頻(pin)率(lv)信(xin)(xin)號輸出特性(xing)：高(gao)電(dian)(dian)(dian)(dian)平(ping)≥4.5V；低電(dian)(dian)(dian)(dian)平(ping)≤0.5V； 驅動(dong)電(dian)(dian)(dian)(dian)流≤10 mA；負(fu)載(zai)電(dian)(dian)(dian)(dian)阻≥10kΩ 直流電(dian)(dian)(dian)(dian)流：4~20mA

頻(pin)率信(xin)號安(an)(an)全(quan)柵NPEXA-CA61/NPEXA-CS611向(xiang)危險區(qu)儀(yi)表提供隔離電源，并將來自危險區(qu)的(de)(de)頻(pin)率信(xin)號，經隔離變送后輸出(chu)到安(an)(an)全(quan)區(qu)。也可以通過配置的(de)(de)通訊(xun)接口(kou)在安(an)(an)全(quan)區(qu)進行(xing)串口(kou)通訊(xun)聯網，它(ta)是智能(neng)化的(de)(de)安(an)(an)全(quan)柵產品。

頻率信(xin)號(hao)安全柵NPEXA-C61/NPEXA-C611工業(ye)(ye)現場一(yi)(yi)般需要采(cai)(cai)用兩線制傳輸(shu)方式(shi)的配(pei)(pei)電(dian)(dian)器(qi)，既要為諸如壓力變送器(qi)等(deng)一(yi)(yi)次(ci)儀表提供(gong)24V 配(pei)(pei)電(dian)(dian)電(dian)(dian)源，同時又要對(dui)輸(shu)入的電(dian)(dian)流(liu)信(xin)號(hao)進行采(cai)(cai)集、放大(da)、運算(suan)、和進行抗干(gan)擾處(chu)理后，再輸(shu)出隔(ge)(ge)離(li)的電(dian)(dian)流(liu)和電(dian)(dian)壓信(xin)號(hao)，供(gong)后面的二(er)次(ci)儀表或其它儀表使用。 但一(yi)(yi)些特(te)殊的工業(ye)(ye)現場不(bu)但需要兩線制傳輸(shu)，既提供(gong)配(pei)(pei)電(dian)(dian)電(dian)(dian)源又有(you)信(xin)號(hao)隔(ge)(ge)離(li)功能

NHR-A34系列(lie)頻率輸入檢測端(duan)隔離柵