NI PXIe-8521控制模塊工控
1.產(chǎn) 品 介 紹
品牌：NI
型號(hào)：NI PXIe-8521
產(chǎn)品說(shuō)明：控制模塊工控
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：
示例1：“負(fù)載要求”表顯示NI PXIe-8521模塊從+5VDC電源汲取：NI PXIe-8521910 mA。NI PXIe-8521兩個(gè)12VDC電源均無(wú)電流要計(jì)算功耗，請(qǐng)將0.910安培乘以5伏特。答案是：?4.55瓦（該模塊耗散的熱量）示例2：“負(fù)載要求”表顯示，NI PXIe-8521模塊從+5VDC電源汲?。篭374；80 mA；從+24V DC隔離電源汲取125 mA計(jì)算+5VDC電源的功耗：將0.08安培乘以5伏特，得出0.40瓦的值。要計(jì)算+24V直流電源的功耗：將0.125安培乘以24伏特，得出3.0瓦的值。將兩者相加，該模塊的總散熱量為3.4瓦。第2步：PLC電源的計(jì)算90系列電源的基本規(guī)則是效率為66%。說(shuō)明這一點(diǎn)的另一種方式是，電源每向PLC輸送2瓦功率，就會(huì)以熱量的形式消耗1瓦功率。因此，您可以使用上述步驟1中的方法計(jì)算特定電源所服務(wù)的機(jī)架中所有模塊的總功率需求，然后將該數(shù)字除以2，得出電源消耗值。NI PXIe-8521
Example 1: The “Load Requirements” table shows that the INI PXIe-8521 module draws:NI PXIe-8521 910 mA from the +5VDC supply.NI PXIe-8521 No current from either of the two 12VDC supplies To calculate power dissipation, multiply 0.910 Amps times 5 volts. The answer is:NI PXIe-8521 4.55 watts (of heat dissipated by this module) Example 2: The “Load Requirements” table shows that the IC693MDL241 module draws:NI PXIe-852180 mA from the +5VDC supplyNI PXIe-8521 125 mA from the +24VDC Isolated supply To calculate power dissipation from the +5VDC supply: Multiply 0.08 Amps times 5 volts to arrive at a value of 0.40 watts. To calculate power dissipation from the +24VDC supply: Multiply 0.125 Amps times 24 volts to arrive at a value of 3.0 watts. Adding the two together yields a total heat dissipation by this module of 3.4 watts.Step 2: Calculation for PLC Power Supplies A basic rule for Series 90 power supplies is that they are 66% efficient. Another way of stating this is that the power supply dissipates 1 watt of power in the form of heat for every 2 watts of power it delivers to the PLC. Therefore, you can calculate the total power requirement for all of the modules in the rack served by a particular power supply using the method in Step 1 above, then divide that figure by 2 to arrive at the power supply dissipation value.
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