PXIE-1085 - NI Chassis

Description

The National Instruments NI PXIe-1085 Chassis (Part Numbers: 781813-01, 783588-01, 153869H-01) features a high-bandwidth, all-hybrid backplane to meet a variety of high-performance test and measurement application needs. There are two versions of the PXIe-1085. The specifications are the same, except the maximum system bandwidth. The max bandwidth for the NI PXIe-1085 Chassis part number 781813-01 is 12 GB/s, while the max bandwidth for the NI PXIe-1085 Chassis part number 783588-01 is the 24 GB/s. The hybrid connector type in every peripheral slot allows the most flexibility in terms of instrumentation module placement. It also incorporates all the features of the latest PXI specifications, including support for both PXI and PXI Express modules with a built-in 10 MHz reference clock, a PXI trigger bus, and a PXI star trigger for PXI modules. There is also a built-in 100 MHz reference clock, SYNC100, and PXI differential star trigger for PXI Express modules. The PXIe-1085 Chassis has 16 hybrid slots and 1 PXI Express system timing slot, high performance, up to 4 GB/s per-slot dedicated bandwidth for all slots, 12 GB/s or 24 GB/s maximum system bandwidth, and compatibility with PXI, PXI Express, CompactPCI, and CompactPCI Express modules. The device operates on software provided by the PXI Platform Services 3.0 (or higher versions) software media, and can be configured using the Measurement & Automation Explorer (MAX) tool. Also, it is equipped with 2 SMA connectors. The PXI chassis weighs 40.3 lb and has the dimensions: 6.97 x 18.30 x 19.38 inches.   The NI PXIe-1085 Chassis has a remote power-inhibit control and variable speed fan controller to optimize cooling and acoustic emissions. Its 38.25 W per slot cooling meets increased PXIe cooling requirements. The device has a low-jitter internal 10 MHz reference clock for PXI/PXI Express slots with ± 25 ppm stability, and a low-jitter internal 100 MHz reference clock for PXI Express slots with ± 25 ppm stability. The NI PXIe-1085 is AC powered and its power, temperature, and fan monitoring features are highly reliable, as the device is HALT tested for increased reliability. This model additionally has quiet operation for 0 to 30 °C at 51.2 dBA.

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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