PXIE-5172 模拟输出通道 将数字信号转换为模拟信号输出

PXIE-5172是美国国家仪器（National Instruments，简称NI）推出的一款16位模拟输出模块。

PXIE-5172有2个模拟输出通道，6个数字输入通道，2个数字输出通道，以及16个可配置的模拟输入通道。它具有库隔离，源同步，32位计数器等功能。PXIE-5172提供隔离的安全和性能优势与精确控制的高性能时序、校准技术和放大的最佳组合，以提供精确的测量。该模块被认为是电气噪声和高电压环境中控制、设计、测试和测量应用的理想解决方案。此外，通过该模块，用户可以读取近程传感器、编码器、流量计、继电器、控制阀，甚至泵。

模拟输出模块是一种电子设备，它可以将数字信号转换为模拟信号输出。它通常用于需要控制模拟设备的系统中，例如控制电机速度、调节温度、控制灯光亮度等。

模拟输出模块通常具有多个模拟输出通道，可以输出不同的模拟信号，例如电压、电流、频率等。它还可以设置输出信号的范围、精度和分辨率等参数，以满足不同的应用需求。

PXIE-5172模拟输出模块通常与微控制器、PLC 等数字控制设备配合使用，通过数字控制设备的输出信号来控制模拟输出模块的输出信号。在实际应用中，模拟输出模块通常需要与传感器、执行器等外部设备配合使用，以实现对物理量的控制和监测。

PXIE-5172模拟量采集模块的工作原理是利用模数转换器（ADC）将连续变化的模拟量信号转换为离散的数字信号。

模数转换器按照一定的采样频率对模拟信号进行采样，并将采样值转换为数字形式。常见的模数转换器有逐次逼近型和ΔΣ型两种。逐次逼近型模数转换器通过逐步逼近的方式将模拟信号与参考电压进行比较，直到达到所需的精度。ΔΣ型模数转换器则通过对模拟信号进行高速取样和过采样，再经过滤波和数字处理，得到高精度的数字信号输出。

PXIE-5172 模拟输出通道 将数字信号转换为模拟信号输出

The PXIE-5172 is a 16-bit analog output module from National Instruments (NI).

The PXIE-5172 has 2 analog output channels, 6 digital input channels, 2 digital output channels, and 16 configurable analog input channels. It has library isolation, source synchronization, 32-bit counter and other functions. The PXIE-5172 offers the best combination of isolated safety and performance benefits with precisely controlled high-performance timing, calibration technology and amplification to deliver accurate measurements. The module is considered an ideal solution for control, design, test and measurement applications in electrical noise and high voltage environments. In addition, through this module, users can read short-range sensors, encoders, flow meters, relays, control valves, and even pumps.

An analog output module is an electronic device that can convert a digital signal into an analog signal output. It is commonly used in systems that need to control analog devices, such as controlling motor speed, regulating temperature, controlling light brightness, and so on.

Analog output modules usually have multiple analog output channels, which can output different analog signals, such as voltage, current, frequency, etc. It can also set parameters such as the range, accuracy and resolution of the output signal to meet different application needs.

The PXIE-5172 analog output module is usually used in conjunction with digital control devices such as microcontrollers and PLC to control the output signal of the analog output module through the output signal of the digital control device. In practical applications, analog output modules usually need to be used in conjunction with external devices such as sensors and actuators to realize the control and monitoring of physical quantities.

The working principle of the PXIE-5172 analog data acquisition module is to convert continuously changing analog signals into discrete digital signals by using an analog-to-digital converter (ADC).

The analog-to-digital converter samples the analog signal at a certain sampling frequency and converts the sampled value to digital form. There are two common analog-to-digital converters: successive approximation type and Delta-sigma type. Successive approximation analog-to-digital converters compare the analog signal with the reference voltage in a step-by-step approach until the desired accuracy is achieved. The Delta-Sigma analog-to-digital converter obtains high precision digital signal output through high speed sampling and oversampling of analog signal, and then filtering and digital processing.