PXIE-4322 - NI Analog Output Module

Description

The PXIe-4322 (Part Number: 782878-01) is a 16-Bit, 8-Channel Analog Output Module from National Instruments. This module comes with exceptional operational capabilities. The NI PXIe-4322 module implements integrated signal conditioning. This module also offers a procedure for channel to channel isolation, which further enhances its features and performance. The device can also combine the operations of multiple devices. It includes signal conditioning and digital to analog converters. The type of the DAC is R-2R. The PXIe-4322 Analog Output Module comes with a built-in protection mechanism to safeguard the equipment against damage from overvoltage and short circuit currents. The maximum value of overvoltage that it can bear is ±120 volts. The National Instruments PXIe-4322 Analog Output Module offers an update rate with a maximum value of 250 kS per second per channel. The device has the capability to both source and sink the current, which makes it suitable for critical industrial applications. This module offers high voltage and output currents along with the isolation schemes. This feature enables the user to implement the module in requirements involving automotive applications. The NI PXIe-4322 module has a standard warm-up time of 15 minutes, which helps achieve the desired accuracy. Also, the device should be calibrated at least once a year. The PXIe-4322 Analog Output Module has timing accuracy of 50 ppm of the sample rate. The timing resolution is 10 nanoseconds. The output FIFO buffer capacity is 8,191 samples. It is shared among all the channels that are being used at a given time. It also offers different AO waveform modes, such as non-periodic and periodic waveforms. The periodic waveforms are regenerated either from the FIFO or host buffer. The PXIe-4322 is run using the NIDAQmx driver software which is compatible with application development environments (ADEs) such as LabVIEW or LabWindows/CVI. The PXIe-4322 weighs 5.7 oz, and measures 6.3 x 3.9 in. in physical dimensions. The NI device has recommended operating and storage temperature ranges of 0 °C to 55 °C and -40 °C to 71 °C respectively, non-condensing operating and storage humidity ranges of 10% to 90% and 5% to 95% respectively.

One: PLC analog input module (analog input module), also known as A/D module, converts the continuous analog signal generated by the sensor detection in the field into the digital quantity that the PLC CPU can receive, generally 12-bit binary number, the more digital quantity modules, the higher the resolution. Two: PLC analog output module. The analog output module, also known as D/A module, converts the digital quantity sent by the PLC CPU to the analog output module into the analog quantity (voltage or current) that can be received by the external device. The digital signal received by the analog output module is generally 12-bit binary number, and the more digital quantity modules, the higher the resolution. The digital module is to detect the state of the external switching input. Three: Digital input and output signal is the switching signal, 0 or 1, analog signal, there are two, voltage or current signal, generally the signal transmitted by the transmitter, such as the pressure transformer to detect the pressure of the water pipe, it will output an analog signal 4-20ma or 0-10V signal to the PLC, PLC for data processing, This is the difference between a digital input module and an analog input module.

In the input sampling phase, the PLC successively reads all input status and data by scanning and stores them in the corresponding cell in the I/O image area. After the end of the input sampling, the user program execution and output refresh phase. In both phases, even if the input state and data change, the state and data of the corresponding unit in the I/O map area will not change. Therefore, if the input is a pulse signal, the width of the pulse signal must be greater than one scan cycle to ensure that the input can be read in any case. The acquisition of the switching quantity is realized through the PLC input module, which is generally a DC 24V input. The PLC provides a common point, positive or negative, and then the common point is connected to the limit switch and other devices. When the limit is closed, the path is formed and the signal is introduced into the PLC input point. Specifically why the input point to power inside the state is on, is the function of PLC itself, you do not need to tube. Through the analog module, A/D (analog/digital) module, the external weight signal, temperature signal, pressure signal can be introduced, A/D module can accept the signal is 0-10V, 0-5V, -5-5V voltage signal and 0-20MA, 4-20MA current signal. If the signal obtained by the terminal acquisition module is not these standard signals, but also through the transmitter conversion, after the standard signal enters the A/D module, it will be converted by A/D into a number, the specific range is different PLC is not the same, these converted digital quantities, can be used by the program, conversion, processing, and finally get the required data displayed.

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