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href="/kyf763372625-SonList-421436/" target="_blank" title="M12信號線插頭">M12信號線插頭</a></li> <li><a href="/kyf763372625-SonList-363304/" target="_blank" title="傳感器執(zhí)行器分線盒">傳感器執(zhí)行器分線盒</a></li> <li><a href="/kyf763372625-SonList-288923/" target="_blank" title="航空插頭">航空插頭</a></li> </ul> </li> <li><a href="/kyf763372625-ParentList-282665/" title="總線分線盒">總線分線盒</a> <ul class="two_profl"> <li><a href="/kyf763372625-SonList-427752/" target="_blank" title="分配器">分配器</a></li> <li><a href="/kyf763372625-SonList-329543/" target="_blank" title="M12總線分線盒">M12總線分線盒</a></li> <li><a href="/kyf763372625-SonList-288094/" target="_blank" title="M8總線分線盒">M8總線分線盒</a></li> </ul> </li> <li><a href="/kyf763372625-ParentList-282664/" title="M5連接器">M5連接器</a> <ul class="two_profl"> <li><a href="/kyf763372625-SonList-363303/" target="_blank" title="M5工業(yè)連接器">M5工業(yè)連接器</a></li> <li><a href="/kyf763372625-SonList-288085/" target="_blank" title="M5航空插頭">M5航空插頭</a></li> </ul> </li> <li><a 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href="/kyf763372625-ParentList-282659/" title="M12連接器與插座">M12連接器與插座</a> <ul class="two_profl"> <li><a href="/kyf763372625-SonList-421439/" target="_blank" title="devicenet總線插頭">devicenet總線插頭</a></li> <li><a href="/kyf763372625-SonList-421438/" target="_blank" title="profibus總線插頭">profibus總線插頭</a></li> <li><a href="/kyf763372625-SonList-329542/" target="_blank" title="M12連接器">M12連接器</a></li> <li><a href="/kyf763372625-SonList-288092/" target="_blank" title="M12插座">M12插座</a></li> </ul> </li> <li><a href="/kyf763372625-ParentList-461266/" title="AISG線束">AISG線束</a> <ul class="two_profl"> <li><a href="/kyf763372625-SonList-554995/" target="_blank" title="AISG航空插座">AISG航空插座</a></li> <li><a href="/kyf763372625-SonList-554994/" target="_blank" title="AISG航空插頭連接器">AISG航空插頭連接器</a></li> </ul> </li> <li><a href="/kyf763372625-ParentList-1204480/" title="機器人">機器人</a> <ul class="two_profl"> <li><a href="/kyf763372625-SonList-1204481/" target="_blank" title="快換裝置">快換裝置</a></li> </ul> </li> <li><a href="/kyf763372625-ParentList-1213191/" title="流量">流量</a> <ul class="two_profl"> <li><a href="/kyf763372625-SonList-1213192/" target="_blank" title="流量開關">流量開關</a></li> </ul> </li> <li><a href="/kyf763372625-ParentList-1213443/" title="總線模塊總線分線盒">總線模塊總線分線盒</a> <ul class="two_profl"> <li><a href="/kyf763372625-SonList-1213444/" target="_blank" title="模塊">模塊</a></li> </ul> </li> <li><a href="/kyf763372625-ParentList-1213646/" title="轉接器">轉接器</a> <ul class="two_profl"> <li><a href="/kyf763372625-SonList-1213648/" target="_blank" title="N-TNC轉接器">N-TNC轉接器</a></li> </ul> </li> <li><a href="/kyf763372625-ParentList-1573233/" title="模擬器">模擬器</a> <ul class="two_profl"> <li><a href="/kyf763372625-SonList-1731649/" target="_blank" title="氙燈">氙燈</a></li> <li><a href="/kyf763372625-SonList-1573235/" target="_blank" title="紫外光模擬器">紫外光模擬器</a></li> <li><a href="/kyf763372625-SonList-1573234/" target="_blank" title="太陽光模擬器">太陽光模擬器</a></li> </ul> </li> <li><a href="/kyf763372625-ParentList-1724983/" title="旋轉電連接器">旋轉電連接器</a> <ul class="two_profl"> <li><a href="/kyf763372625-SonList-1724987/" target="_blank" title="電航空插頭">電航空插頭</a></li> <li><a href="/kyf763372625-SonList-1724986/" target="_blank" title="電連接器">電連接器</a></li> </ul> </li> </ul> <script language="javascript" type="text/javascript"> try { document.getElementById("nynavID" + nynav).className = "dd_hover"; } catch (e) {} </script> </div> <div class="zw5jam9d" id="right_box"> <div class="zw5jam9d" id="map"> <h1>產(chǎn)品中心</h1> <div id="zw5jam9d" class="map_right"> 您現(xiàn)在的位置：<a href="/">首頁</a> > <a href="/products.html">產(chǎn)品中心</a> > <span>DP終端電阻</span> </div> </div> <div class="zw5jam9d" id="nr_main_box"> <div class="zw5jam9d" id="pro_detail_box01"> <div class="zw5jam9d" id="pro_detail_text"> <h1>DP終端電阻</h1> <div id="zw5jam9d" class="pro_gwc_an_box"> <p> <div class="zw5jam9d" id="bdshare" class="bdshare_t bds_tools get-codes-bdshare"> <span id="zw5jam9d" class="bds_more" style=" line-height:18px;">分享到：</span> <a class="bds_qzone"></a> <a class="bds_tsina"></a> <a class="bds_tqq"></a> <a class="bds_renren"></a> <a class="bds_t163"></a> <a class="shareCount"></a> </div> <script type="text/javascript" id="bdshare_js" data="type=tools&uid=0" ></script> <script type="text/javascript" id="bdshell_js"></script> <script type="text/javascript"> document.getElementById("bdshell_js").src = "http://bdimg.share.baidu.com/static/js/shell_v2.js?cdnversion=" + Math.ceil(new Date()/3600000) </script> </p> </div> </div> <div class="zw5jam9d" id="prodetail_img"> <span> <img src="http://img58.gkzhan.com/gxhpic_3b9307fd41/a80e2892cb425e192867c4de3e1ef8d8819975c420b22df36dde54ac33803ec3a4f7a13341558923.jpg" onload="AutoResizeImage(730,300,this)"> </span> </div> </div>  <div class="zw5jam9d" id="ny_pro_box02"> <div class="zw5jam9d" id="con"> <ul id="tags"> <li class=selectTag><A onmouseover="selectTag('tagContent0',this)" href="javascript:void(0)"onFocus="this.blur()">產(chǎn)品介紹</A> </LI> <li><A onmouseover="selectTag('tagContent1',this)" href="javascript:void(0)"onFocus="this.blur()">在線留言</A> </LI> </ul> <div class="zw5jam9d" id=tagContent> <div id="zw5jam9d" class="tagContent selectTag" id=tagContent0> <p><span style="font-size:18px"> <span style="font-family:宋體">上?？朴姎饪萍加邢薰靖鶕?jù)客戶實際需要定制生產(chǎn)處</span><span style="font-family:宋體"><strong>M12終端電阻</strong>、<strong>M8終端電阻</strong>、<strong>7/8終端電阻</strong>、<strong>5/8終端電阻</strong>等，其產(chǎn)品主要適用于profibus總線、devicenet總線、CANopen總線等現(xiàn)場總線設備中。</span></span></p><p><span style="font-size:18px"> <strong><span style="font-family:宋體">DP終端電阻</span></strong><span style="font-family:宋體">為精密電阻120Ω，并聯(lián)到zui末端RS485電纜的兩芯線上。</span></span></p><p><span style="font-size:18px"><span style="font-family:宋體"><img alt=" 上?？朴姎饪萍加邢薰靖鶕?jù)客戶實際需要定制生產(chǎn)處M12終端電阻、M8終端電阻、7/8終端電阻、5/8終端電阻等，其產(chǎn)品主要適用于profibus總線、devicenet總線、CANopen總線等現(xiàn)場總線設備中。" data-cke-saved-src="https://img80.gkzhan.com/" src="https://img80.gkzhan.com/" style="height:412px; width:580px" /></span></span></p><p><span style="font-size:18px"><span style="font-family:宋體">1.采用阻抗匹配、低衰減的RS485電纜更有利于保證通信。</span></span></p><p><span style="font-size:18px"><span style="font-family:宋體">2.單層屏蔽的電纜屏蔽層應一端接地；雙層絕緣隔離型的電纜屏蔽層其外層（含鎧裝）應兩端接地，內層屏蔽則應一端接地！</span></span></p><p><span style="font-size:18px"><span style="font-family:宋體">3.傳輸距離超過300米應加終端電阻（一般為120Ω）。</span></span></p><p><span style="font-size:18px"> <strong><span style="font-family:宋體">DP終端電阻</span></strong></span></p><p><span style="font-size:18px"><span style="font-family:宋體">終端電阻是為了消除在通信電纜中的信號反射</span></span></p><p><span style="font-size:18px"><span style="font-family:宋體">在通信過程中，有兩種信號因導致信號反射：阻抗不連續(xù)和阻抗不匹配。</span></span></p><p><span style="font-size:18px"><span style="font-family:宋體"> 阻抗不連續(xù)，信號在傳輸線末端突然遇到電纜阻抗很小甚至沒有，信號在這個地方就會引起反射。這種信號反射的原理，與光從一種媒質進入另一種媒質要引起反射是相似的。消除這種反射的方法，就必須在電纜的末端跨接一個與電纜的特性阻抗同樣大小的終端電阻，使電纜的阻抗連續(xù)。由于信號在電纜上的傳輸是雙向的，因此，在通訊電纜的另一端可跨接一個同樣大小的<strong>終端電阻</strong>。</span></span></p><p><span style="font-size:18px"><span style="font-family:宋體"> 引起信號反射的另個原因是數(shù)據(jù)收發(fā)器與傳輸電纜之間的阻抗不匹配。這種原因引起的反射，主要表現(xiàn)在通訊線路處在空閑方式時，整個網(wǎng)絡數(shù)據(jù)混亂。</span></span></p><p></p><p><span style="font-size:18px"><span style="font-family:宋體"> 要減弱反射信號對通訊線路的影響，通常采用噪聲抑制和加偏置電阻的方法。在實際應用中，對于比較小的反射信號，為簡單方便，經(jīng)常采用加偏置電阻的方法。</span></span></p><p><img alt=" 為精密電阻120Ω，并聯(lián)到zui末端RS485電纜的兩芯線上。 1.采用阻抗匹配、低衰減的RS485電纜更有利于保證通信。 2.單層屏蔽的電纜屏蔽層應一端接地；雙層絕緣隔離型的電纜屏蔽層其外層（含鎧裝）應兩端接地，內層屏蔽則應一端接地！" data-cke-saved-src="https://img80.gkzhan.com/gxhpic_3b9307fd41/bb33f2c9b6dc3b8558b20a8adfa02ae9fc7f2bc980ce5db4e2f18e2e45487e4caff16e0d0f0389ca.jpg" src="https://img80.gkzhan.com/gxhpic_3b9307fd41/bb33f2c9b6dc3b8558b20a8adfa02ae9fc7f2bc980ce5db4e2f18e2e45487e4caff16e0d0f0389ca.jpg" style="height:412px; width:504px" /></p><p style="text-align:center"><strong><span style="color:#FF0000"><span style="font-size:24px"><span style="font-family:宋體">我們是生產(chǎn)廠家，我們特別擅長接受用戶特殊定制生產(chǎn)。</span></span></span></strong></p><p><span style="font-size:18px"><span style="font-family:宋體">咨詢。</span></span></p><p> </p> </div> <div id="zw5jam9d" class="tagContent" id=tagContent1> <table width="100%" border="0" align="center" cellpadding="0" cellspacing="0" id="MSGTable"> <tr> <td height="23" bgcolor="#EBEBEB">　如果你對<b>DP終端電阻</b>感興趣，想了解更詳細的產(chǎn)品信息，填寫下表直接與廠家聯(lián)系：</td> </tr> </table> <br /> <link rel="stylesheet" type="text/css" href="/css/MessageBoard_style.css"> <script language="javascript" src="/skins/Scripts/order.js?v=20210318" type="text/javascript"></script> <a name="order" id="order"></a> <div id="zw5jam9d" class="ly_msg" id="ly_msg"> <form method="post" name="form2" id="form2"> <h3>留言框 </h3> <ul> <li> <h4 class="xh">產(chǎn)品：</h4> <div id="zw5jam9d" class="msg_ipt1"><input class="textborder" size="30" name="Product" id="Product" value="DP終端電阻" placeholder="請輸入產(chǎn)品名稱" /></div> </li> <li> <h4>您的單位：</h4> <div id="zw5jam9d" class="msg_ipt12"><input class="textborder" size="42" name="department" id="department" placeholder="請輸入您的單位名稱" /></div> </li> <li> <h4 class="xh">您的姓名：</h4> <div id="zw5jam9d" class="msg_ipt1"><input class="textborder" size="16" name="yourname" id="yourname" placeholder="請輸入您的姓名"/></div> </li> <li> <h4 class="xh">聯(lián)系電話：</h4> <div id="zw5jam9d" class="msg_ipt1"><input class="textborder" size="30" name="phone" id="phone" placeholder="請輸入您的聯(lián)系電話"/></div> </li> <li> <h4>常用郵箱：</h4> <div id="zw5jam9d" class="msg_ipt12"><input class="textborder" size="30" name="email" id="email" placeholder="請輸入您的常用郵箱"/></div> </li> <li> <h4>省份：</h4> <div id="zw5jam9d" class="msg_ipt12"><select id="selPvc" class="msg_option"> <option value="0" selected="selected">請選擇您所在的省份</option> <option value="1">安徽</option> <option value="2">北京</option> <option value="3">福建</option> <option value="4">甘肅</option> <option value="5">廣東</option> <option value="6">廣西</option> <option value="7">貴州</option> <option value="8">海南</option> <option value="9">河北</option> <option value="10">河南</option> <option value="11">黑龍江</option> <option value="12">湖北</option> <option value="13">湖南</option> <option value="14">吉林</option> <option value="15">江蘇</option> <option value="16">江西</option> <option value="17">遼寧</option> <option value="18">內蒙古</option> <option value="19">寧夏</option> <option value="20">青海</option> <option value="21">山東</option> <option value="22">山西</option> <option value="23">陜西</option> <option value="24">上海</option> <option value="25">四川</option> <option value="26">天津</option> <option value="27">新疆</option> <option value="28">西藏</option> <option value="29">云南</option> <option value="30">浙江</option> <option value="31">重慶</option> <option value="32">香港</option> <option value="33">澳門</option> <option value="34">中國臺灣</option> <option value="35">國外</option> </select></div> </li> <li> <h4>詳細地址：</h4> <div id="zw5jam9d" class="msg_ipt12"><input class="textborder" size="50" name="addr" id="addr" placeholder="請輸入您的詳細地址"/></div> </li> <li> <h4>補充說明：</h4> <div id="zw5jam9d" class="msg_ipt12 msg_ipt0"><textarea class="areatext" style="width:100%;" name="message" rows="8" cols="65" id="message" placeholder="請輸入您的任何要求、意見或建議"></textarea></div> </li> <li> <h4 class="xh">驗證碼：</h4> <div id="zw5jam9d" class="msg_ipt2"> <div id="zw5jam9d" class="c_yzm"> <input class="textborder" size="4" name="Vnum" id="Vnum"/> <a href="javascript:void(0);" class="yzm_img"><img src="/Image.aspx" title="點擊刷新驗證碼" onclick="this.src='/image.aspx?'+ Math.random();" width="90" height="34" /></a> </div> <span>請輸入計算結果（填寫阿拉伯數(shù)字），如：三加四=7</span> </div> </li> <li> <h4></h4> <div id="zw5jam9d" class="msg_btn"><input type="button" onclick="return Validate();" value="提交" name="ok" class="msg_btn1"/><input type="reset" 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