NI PXIe-5540工控控制模塊
1.產(chǎn) 品 介 紹
品牌：NI
型號(hào)：NI PXIe-5540
產(chǎn)品說(shuō)明：工控控制模塊
優(yōu)勢(shì)：供應(yīng)進(jìn)口原裝正品，專業(yè)停產(chǎn)配件。
2.產(chǎn) 品 詳 情 資 料：
NI PXIe-5540離散輸入模塊示例：GFK-0898系列90-30 PLC I/O模塊規(guī)格手冊(cè)中IC693MDL240 16點(diǎn)離散120 VAC輸入模塊的“規(guī)格”表提供了以下信息：額定電壓下的輸入電流：12 mA（典型值）將該值用于該模塊的所有輸入計(jì)算。在本例中，輸入模塊的八個(gè)點(diǎn)用于開(kāi)關(guān)，對(duì)于正常操作，開(kāi)關(guān)在100%時(shí)間內(nèi)保持打開(kāi)（關(guān)閉）。這些開(kāi)關(guān)包括緊急停機(jī)、超溫、潤(rùn)滑壓力正常和類似開(kāi)關(guān)。使用公式平均功耗=輸入電壓x輸入電流（以安培為單位）x接通時(shí)間百分比（以十進(jìn)制表示）：120 x.012 x 1.0=1.44瓦特/輸入，然后將此結(jié)果乘以8：1.44瓦特x 8輸入=8個(gè)輸入的總功率11.52瓦特。在本例中，NI PXIe-5540此16點(diǎn)模塊上的兩個(gè)輸入點(diǎn)用于控制開(kāi)啟和泵啟動(dòng)按鈕。在正常情況下，這些按鈕每天只按一次，持續(xù)約一秒鐘，時(shí)間剛好足以啟動(dòng)控制器和泵。因此，它們對(duì)我們的功率計(jì)算的影響可以忽略不計(jì)，我們將假設(shè)它們的功耗為零：2個(gè)輸入的總功耗為0.0瓦NI PXIe-5540
Discrete Input Module Example: The “Specifications” table for the IC693MDL240 16-Point Discrete 120 VAC Input Module in the Series 90-30NI PXIe-5540 PLC I/O Module Specification Manual, GFK-0898, gives the following information: Input Current: 12 mA (typical) at rated voltage Use this value for all of the input calculations for this module. In this example, eight of the Input Module’s points are used for switches that, for normal operation, stay on (closed) 100% of the time. These include the Emergency Stop, NI PXIe-5540Over Temperature, Lube Pressure OK, and similar switches. Use the formula Average Power Dissipation = Input Voltage x Input Current (in Amps) x Percent (expressed as a decimal) of on-time: 120 x .012 x 1.0 = 1.44 watts per input Then multiply this result by 8: 1.44 watts x 8 inputs = 11.52 watts total for the 8 inputs Also in this example, two input points on this 16-point module are for the Control On and Pump Start pushbuttons. Under normal conditions, these pushbuttons are only pressed once per day for about one second – just long enough to start up the control and pump. Therefore, their effect on our power calculation is negligible and we will assume a power dissipation of zero for them: 0.0 watts total for 2 inputsNI PXIe-5540
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