NI PXIe-5540工控控制模块
1.产 品 介 绍
品牌：NI
型号：NI PXIe-5540
产品说明：工控控制模块
优势：供应进口原装正品，专业停产配件。
2.产 品 详 情 资 料：
NI PXIe-5540离散输入模块示例：GFK-0898系列90-30 PLC I/O模块规格手册中IC693MDL240 16点离散120 VAC输入模块的“规格”表提供了以下信息：额定电压下的输入电流：12 mA（典型值）将该值用于该模块的所有输入计算。在本例中，输入模块的八个点用于开关，对于正常操作，开关在100%时间内保持打开（关闭）。这些开关包括紧急停机、超温、润滑压力正常和类似开关。使用公式平均功耗=输入电压x输入电流（以安培为单位）x接通时间百分比（以十进制表示）：120 x.012 x 1.0=1.44瓦特/输入，然后将此结果乘以8：1.44瓦特x 8输入=8个输入的总功率11.52瓦特。在本例中，NI PXIe-5540此16点模块上的两个输入点用于控制开启和泵启动按钮。在正常情况下，这些按钮每天只按一次，持续约一秒钟，时间刚好足以启动控制器和泵。因此，它们对我们的功率计算的影响可以忽略不计，我们将假设它们的功耗为零：2个输入的总功耗为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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