描述
PCI4000
輸入模塊用來接收和采集輸入信號，開關(guān)量輸入模塊用來接收從按鈕、選擇開關(guān)、數(shù)字撥碼開關(guān)、限位開關(guān)、接近開關(guān)、光電開關(guān)、壓力繼電器等來的開關(guān)量輸入信號。模擬量輸入模塊用來接收電位器、測速發(fā)電機(jī)和各種變送器提供的連續(xù)變化的模擬量電流、電壓信號，或者直接接收熱電阻、熱電偶提供的溫度信號。
開關(guān)量輸出模塊用來控制接觸器、電磁閥、電磁鐵、指示燈、數(shù)字顯示裝置和報警裝置等輸出設(shè)備，模擬量輸出模塊用來控制電動調(diào)節(jié)閥、變頻器等執(zhí)行器。
CPU模塊內(nèi)部的工作電壓一般是DC5V，而PLC的外部輸入/輸出信號電壓一般較高，例如DC24V或AC220V。從外部引入的尖峰電壓和干擾噪聲可能損壞CPU模塊中的元器件，或使PLC不能正常工作。在信號模塊中，用光耦合器和小型繼電器等器件來隔離PLC的內(nèi)部電路和外部的輸入、輸出電路。信號模塊除了傳遞信號外，還有電平轉(zhuǎn)換與隔離的作用。低壓斷路器的選用，應(yīng)根據(jù)具體使用條件選擇使用類別，選擇額定工作電壓、額定電流、脫扣器整定電流和分勵、欠壓脫扣器的電壓電流等參數(shù)，參照產(chǎn)品樣本提供的保護(hù)特性曲線選用保護(hù)特性，并需對短路特性和靈敏系數(shù)進(jìn)行校驗。當(dāng)與另外的斷路器或其他保護(hù)電器之間有配合要求時，應(yīng)選用選擇型斷路器。低壓斷路器的額定工作電壓Ue。和額定電流Ie。應(yīng)分別不低于線路，設(shè)備的正常額定工作電壓和工作電流或計算電流。斷路器的額定工作電壓與通斷能力及使用類別有關(guān)，同一臺斷路器產(chǎn)品可以有幾個額定工作電壓和相對應(yīng)的通斷能力使用類別。所選斷路器的瞬時或短延時脫扣器整定電流Ir2應(yīng)大于線路尖峰電流。配電斷路器可按不低于尖峰電流1.35倍的原則確定，電動機(jī)保護(hù)電路當(dāng)動作時間大于0.02s時可按不低于1.35倍起動電流的原則確定，如果動作時間小于0.02s，則應(yīng)增加為不低于起動電流的1.7—2倍。這些系數(shù)是考慮到整定誤差和電動機(jī)起動電流可能變化等因素而加的。
產(chǎn)品承諾：
保?證?全新原裝進(jìn)口,
保?證?安全準(zhǔn)時發(fā)貨，
保?證售后服務(wù)質(zhì)量，
優(yōu)勢價格，大量現(xiàn)貨。
主營DCS系統(tǒng)配件
機(jī)器人系統(tǒng)配件
大型伺服系統(tǒng)配件
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