专为FieldPoint和Compact FieldPoint设计国家仪器cFP-AI-111(零件号:777318-111)是16通道、16位模拟输入组件。该型号的通道是单端模拟输入通道。它的输入阻抗为100ω。该型号还具有三种滤波器设置:50 Hz、60 Hz和500 Hz，以及三种输入范围:20 mA、4 mA至20 mA和0 mA至20 mA。此外，该器件的更新速率为3 Hz至0.83 Hz。NI cFP-AI-111为高达2,300 Vrms的瞬变提供集成过压保护。这模拟输入组件可以安装在已经运行并通电的紧凑型FieldPoint底板上，因为它不会中断银行的持续运营。

上的16个输入通道国家仪器cFP-AI-111模块共享一个公共隔离接地参考。这些输入通道在设置为30 mA的集成过流保护下工作。在电流测量中，进入Iin端的电流为正，而流出该端的电流(Iin)为负。

包含在此的超量程功能模拟输入组件使设备能够测量超出每个量程标称值5%的范围。因此，用户将能够在选择20 mA范围的情况下测量21 mA。该器件提供的滤波器为每个通道提供三种设置。这些滤波器是梳状滤波器；因此，它们在谐波或任何基频的倍数处提供抑制陷波。在基频时，应用95 dB的抑制，在谐波时至少提供60 dB的抑制。

NI设备重4.8盎司，尺寸为4.3 x 4.3 x 3.6英寸。在物理维度上。它的推荐工作温度范围为–40至70°C，储存温度范围为–55至85°C，非冷凝湿度范围为10至90% RH，随机和正弦工作振动分别为5 grms和5 g，频率范围为10至500 Hz。

CFP-AI-111

The national instrument cFP-AI-111 (part number: 777318-111) designed specifically for FieldPoint and Compact FieldPoint is a 16 channel, 16 bit analog input component. The channel of this model is a single ended analog input channel. Its input impedance is 100 ω。 This model also has three filter settings: 50 Hz, 60 Hz, and 500 Hz, as well as three input ranges: 20 mA, 4 mA to 20 mA, and 0 mA to 20 mA. In addition, the update rate of the device is from 3 Hz to 0.83 Hz. The NI cFP-AI-111 provides integrated overvoltage protection for transients up to 2300 Vrms. This analog input component can be installed on a compact FieldPoint motherboard that is already running and powered on, as it does not interrupt the continuous operation of the bank. The 16 input channels on the national instrument cFP-AI-111 module share a common isolated ground reference. These input channels operate under integrated overcurrent protection set to 30 mA. In current measurement, the current entering the Iin terminal is positive, while the current flowing out of that terminal (Iin) is negative. The over range function analog input component included here enables the device to measure a range exceeding 5% of the nominal value of each range. Therefore, users will be able to measure 21 mA when selecting a 20 mA range. The filter provided by this device provides three settings for each channel. These filters are comb filters; Therefore, they provide suppression notch at harmonics or multiples of any fundamental frequency. At the fundamental frequency, apply 95 dB suppression and provide at least 60 dB suppression at harmonics. The NI device weighs 4.8 ounces and measures 4.3 x 4.3 x 3.6 inches in size. On the physical dimension. Its recommended operating temperature range is -40 to 70 ° C, storage temperature range is -55 to 85 ° C, non condensing humidity range is 10 to 90% RH, random and sinusoidal working vibrations are 5 grms and 5 g, respectively, and frequency range is 10 to 500 Hz.

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