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href="http://www.cdcfah.com/cp/first-_jxjxysb/">機(jī)械及行業(yè)設(shè)備</a>?<a href="http://www.cdcfah.com/cp/second-jxjxysb_jwjjg/">機(jī)械五金加工</a>?<a href="http://www.cdcfah.com/cp/third-jwjjg_jjg/">鈑金加工</a>?四川GPRS-dtu外殼哪家好推薦咨詢滄州萬瑞電子機(jī)箱供應(yīng)</p><div id="sqwhyea" class="leftbox clearfix"><h1>四川GPRS-dtu外殼哪家好推薦咨詢滄州萬瑞電子機(jī)箱供應(yīng)</h1><div id="bfrijfl" class="proBig"><div id="8wvwxou" class="bigimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UpLoadFile/2019/8/20/11/637018981913171345_nhsdo_4929540.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="qearn37" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UpLoadFile/2019/8/20/11/637018981913171345_nhsdo_4929540.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="g8nxtpb" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)格要求：</span>面議</p><p><span>所在地：</span>河北省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>四川GPRS-dtu外殼哪家好,GPRS-dtu外殼</p><p><span>***更新：</span>2020-08-04 20:06:46</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="xa8ev34" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">滄州萬瑞電子機(jī)箱有限公司</a></p><p><span>聯(lián)系人：</span>李文超</p><p><span>郵箱: </span>2816163037@qq.com</p><p><span>電話: </span>19103271861</p><p><span>傳真: </span>0317_4371300</p><p><span>網(wǎng)址: </span></p><p><span>手機(jī): </span>0317-4371300</p><p><span>地址: </span>河北省滄州市青縣農(nóng)場(chǎng)四分場(chǎng)</p><p>[當(dāng)前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="dqrd3uu" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="mawnjkb" class="box"><p><p style="text-indent:25px">開關(guān)量輸出　　輸出通道數(shù)：8路。　　輸出電平：TTL電平，高電平為3.3V。　　功用：用于遙控，操控開關(guān)，四川GPRS-dtu外殼哪家好，設(shè)備發(fā)動(dòng)中止　　_RB+B、DTP_RB+C、DTP_RC+B、DTP_RC+C、DTP_RD+B、DTP_RD適用型號(hào)：DTP ? 模仿量輸入　　輸入通道：8路單極性電壓或電流信號(hào)，四川GPRS-dtu外殼哪家好。　　輸入電平：0~5V電壓（或許4~20mA電流，訂貨時(shí)要聲明）。　　功用：物理量，四川GPRS-dtu外殼哪家好、電量的測(cè)量，溫度、壓力、流量、水位、電壓等測(cè)量采集　　適用型號(hào)：DTP_RB+A、DTP_RB+C、DTP_RC+A、DTP_RC+C、DTP_RD+A、DTP_RD+C 四川GPRS-dtu外殼哪家好</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="四川GPRS-dtu外殼哪家好,GPRS-dtu外殼" src="http://tyunfile.71360.com/UpLoadFile/2019/8/20/11/637018981913171345_nhsdo_4929540.jpg"></div><p style="text-indent:25px">GPRS DTU運(yùn)用場(chǎng)合一般可以從以下幾個(gè)實(shí)際運(yùn)用角度來講：（1）現(xiàn)場(chǎng)只能運(yùn)用無線通訊環(huán)境當(dāng)數(shù)據(jù)采集現(xiàn)場(chǎng)的設(shè)備需求在移動(dòng)中作業(yè)，或許采集現(xiàn)場(chǎng)處于野外等狀況下，無法供給有線通訊的環(huán)境。這個(gè)時(shí)分，選用GPRS無線網(wǎng)絡(luò)就或許是一個(gè)好的挑選，因?yàn)镚PRS網(wǎng)絡(luò)的掩蓋率在國(guó)內(nèi)現(xiàn)已很高，全國(guó)大部分地區(qū)均有GPRS信號(hào)掩蓋。（2）現(xiàn)場(chǎng)終端的傳輸間隔分散因?yàn)镚PRS網(wǎng)絡(luò)是掩蓋全國(guó)的公共網(wǎng)絡(luò)，因而選用GPRS來傳輸數(shù)據(jù)的一大優(yōu)勢(shì)便是現(xiàn)場(chǎng)采集點(diǎn)可以分步在全國(guó)規(guī)模，數(shù)據(jù)中心與現(xiàn)場(chǎng)采集點(diǎn)之間的間隔不受約束。無線公網(wǎng)通訊（包含GPRS/CDMA網(wǎng)絡(luò),3G網(wǎng)絡(luò)等）這個(gè)十分明顯的長(zhǎng)處是**無線通訊網(wǎng)絡(luò)（比方數(shù)傳電臺(tái)，WiMax，WLAN等）無法到達(dá)的。吉林GPRS-dtu外殼標(biāo)準(zhǔn)</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="四川GPRS-dtu外殼哪家好,GPRS-dtu外殼" src="http://tyunfile.71360.com/UpLoadFile/2019/8/20/11/637018981910989207_nhsdo_7213738.jpg"></div><p style="text-indent:25px">GPRS DTU主動(dòng)發(fā)起與數(shù)據(jù)中心的通訊銜接，并堅(jiān)持通訊銜接一直存在。因?yàn)镚PRS DTU處于移動(dòng)內(nèi)網(wǎng)，而且IP地址不固定。因而，只能由GPRS DTU主動(dòng)銜接數(shù)據(jù)中心，而不能由數(shù)據(jù)中心主動(dòng)銜接GPRS DTU。這就要求數(shù)據(jù)中心具有固定的公網(wǎng)IP地址或固定的域名。數(shù)據(jù)中心的公網(wǎng)IP地址或固定的域名作為參數(shù)存儲(chǔ)在GPRS DTU內(nèi)，以便GPRS DTU一旦上電撥號(hào)成功，就可以主動(dòng)銜接到數(shù)據(jù)中心。詳細(xì)地講，GPRS DTU經(jīng)過數(shù)據(jù)中心的IP地址（假如是選用中心域名的話，先經(jīng)過中心域名解析出中心IP地址）以及端口號(hào)等參數(shù)，向數(shù)據(jù)中心發(fā)起TCP或UDP通訊懇求。在得到中心的響應(yīng)后，GPRS DTU即以為與中心握手成功，然后就堅(jiān)持這個(gè)通訊銜接一直存在，假如通訊銜接中止，GPRS DTU將當(dāng)即從頭與中心握手。 </p><p style="text-indent:25px">在線閑暇測(cè)驗(yàn) 測(cè)驗(yàn)原因：測(cè)驗(yàn)GPRS DTU自己堅(jiān)持已建鏈路的才能，當(dāng)沒有數(shù)據(jù)時(shí)，GPRS DTU經(jīng)過心跳堅(jiān)持自己的銜接，GPRS DTU應(yīng)至少能堅(jiān)持均勻1小時(shí)以上的鏈路持續(xù)時(shí)刻，不發(fā)生斷線重連。測(cè)驗(yàn)辦法：讓GPRS DTU連上數(shù)據(jù)中心后不發(fā)任何數(shù)據(jù)，調(diào)查它能堅(jiān)持鏈路多久，時(shí)刻越長(zhǎng)越好。本項(xiàng)測(cè)驗(yàn)接近完畢時(shí)，應(yīng)向數(shù)據(jù)中心和DTU各發(fā)幾個(gè)數(shù)據(jù)包，來驗(yàn)證該DTU堅(jiān)持的閑暇鏈路是真實(shí)可用的，假如DTU或數(shù)據(jù)中心任何一方無法收到對(duì)方的數(shù)據(jù)包，則為不合格。二）數(shù)據(jù)中心封閉后康復(fù)測(cè)驗(yàn) 測(cè)驗(yàn)原因：數(shù)據(jù)中心在以后運(yùn)轉(zhuǎn)和維護(hù)進(jìn)程中，肯定會(huì)呈現(xiàn)暫時(shí)中止暫停服務(wù)的狀況，因而需求測(cè)驗(yàn)GPRS DTU在數(shù)據(jù)中心康復(fù)后的快速康復(fù)才能。測(cè)驗(yàn)辦法：讓數(shù)據(jù)中心封閉短時(shí)刻，如1分鐘，然后康復(fù)數(shù)據(jù)中心，看DTU是否能快速銜接上來，康復(fù)時(shí)刻應(yīng)該在5分鐘內(nèi)，越快越好，重復(fù)屢次該項(xiàng)測(cè)驗(yàn)，DTU有必要康復(fù)銜接，只需呈現(xiàn)一次DTU一直無法康復(fù)銜接的現(xiàn)象，即為不合格,以此例推就就可以判別出DTU質(zhì)量. </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="四川GPRS-dtu外殼哪家好,GPRS-dtu外殼" src="http://tyunfile.71360.com/UpLoadFile/2019/8/20/11/637018981913015478_nhsdo_9205477.jpg"></div><p style="text-indent:25px"> 電源　　輸入電壓：DTP_RB+ DTP_RC+: +5～12V DC。DTP_RD+: 12~24VDC 　　功耗：比較大電力耗費(fèi)5W。待機(jī)電力耗費(fèi)0.5W。 ? 功耗待機(jī) 3G:40~55mA@12VDC 2G:36~40mA@12VDC 通訊 3G:88~190mA@12VDC 2G:62~68mA@12VDC ? 外型尺度　　DTP_RD+型：PVC塑料外殼，尺度：98×90×37mm 外殼金屬外殼，維護(hù)等級(jí)IP30。外殼和體系安全隔離，特別合適工控現(xiàn)場(chǎng)運(yùn)用 ? 環(huán)境　　作業(yè)溫度：-20℃～55℃ 　　存儲(chǔ)溫度：-40℃～85℃ 　　相對(duì)濕度：5%～95%不結(jié)露　　環(huán)境要求：無腐蝕性氣體，無液體噴濺，無金屬粉塵，無激烈震動(dòng)，無激烈電磁攪擾。　　信號(hào)強(qiáng)度：有手機(jī)信號(hào)（中國(guó)移動(dòng)或中國(guó)聯(lián)通）吉林GPRS-dtu外殼標(biāo)準(zhǔn)</p><p style="text-indent:25px">四川GPRS-dtu外殼哪家好</p><p style="text-indent:25px">因?yàn)門CP/UDP通訊銜接現(xiàn)已樹立，就可以進(jìn)行數(shù)據(jù)雙向通訊了。關(guān)于DTU來說，只需樹立了與數(shù)據(jù)中心的雙向通訊，完成用戶串口數(shù)據(jù)與GPRS網(wǎng)絡(luò)數(shù)據(jù)包的轉(zhuǎn)換就相對(duì)簡(jiǎn)略了。一旦接收到用戶的串口數(shù)據(jù)，DTU就當(dāng)即把串口數(shù)據(jù)封裝在一個(gè)TCP/UDP包里，發(fā)送給數(shù)據(jù)中心。反之，當(dāng)DTU收到數(shù)據(jù)中心發(fā)來的TCP/UDP包時(shí)，從中取出數(shù)據(jù)內(nèi)容，當(dāng)即經(jīng)過串口發(fā)送給用戶設(shè)備。經(jīng)過有線的數(shù)據(jù)采集中心，一起與許多個(gè)GPRS DTU進(jìn)行雙向通訊。這是目前GPRS DTU運(yùn)用體系中**為常用的辦法。四川GPRS-dtu外殼哪家好</p><p style="text-indent:25px">滄州萬瑞電子機(jī)箱有限公司一直專注于電子機(jī)箱、機(jī)柜、面板、模具、五金配件制造、加工:機(jī) 箱、機(jī)柜的整機(jī)組裝;配電箱、配電柜、電氣成套設(shè)備、機(jī) 械設(shè)備配件制造、加工(不含噴涂和表面化學(xué)處理) (依法須經(jīng)批準(zhǔn)的項(xiàng)目，經(jīng)相關(guān)部門批準(zhǔn)后方可開展經(jīng)營(yíng)活動(dòng)) ，是一家機(jī)械及行業(yè)設(shè)備的企業(yè)，擁有自己**的技術(shù)體系。唯才是舉，唯能是用：擁有優(yōu)秀人才51~100人和，是實(shí)現(xiàn)企業(yè)戰(zhàn)略目標(biāo)的基礎(chǔ)，是企業(yè)持續(xù)發(fā)展的動(dòng)力。滄州萬瑞電子機(jī)箱有限公司主營(yíng)業(yè)務(wù)涵蓋[ "鈑金設(shè)備外殼加工", "機(jī)箱機(jī)柜加工定做", "儀器儀表外殼", "配電箱加工" ]，堅(jiān)持“質(zhì)量***、質(zhì)量服務(wù)、顧客滿意”的質(zhì)量方針，贏得廣大客戶的支持和信賴。公司憑著雄厚的技術(shù)力量、飽滿的工作態(tài)度、扎實(shí)的工作作風(fēng)、良好的職業(yè)道德，樹立了優(yōu)良的[ "鈑金設(shè)備外殼加工", "機(jī)箱機(jī)柜加工定做", "儀器儀表外殼", "配電箱加工" ]形象，贏得了社會(huì)各界的信任和認(rèn)可。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/808980.html</p></div></div></div></div></div><div id="fyzf374" class="page-right twoColRt"><div id="geklh3k" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="f7xtkbx" class="recomPic 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