PCI-6225 -NI Multifunction DAQ

Description

The National Instruments PCI-6225 (Part number: 779295-01) is a 16-Bit Multifunction DAQ. This low cost board offers 80 Analog Inputs, 2 Analog Outputs, 16 Digital Inputs, 32 Digital Outputs, and 2 Counters/Timers (32-bit). The NI PCI-6225 delivers reliable data acquisition capabilities for a broad range of applications since users can also add high-voltage measurement capability and sensors to this device by using SCC modules. Featured with 40 differential or 80 single ended DC coupled analog input channels, 16-bit ADC resolution, and 250 kS/s sampling rate, the NI PCI-6225 becomes an ultimate choice for applications where high channel count is required. The device is equipped with 2 68-pin VHDCI I/O connectors. Unlike various other low-cost DAQ devices, this model has redundant analog outputs with a 16-bit resolution digital-to-analog converter. On its analog outputs, the user will be able to achieve 833 kS/s maximum update rate while operating with 1 channel and 740 kS/s (per channel) guaranteed update rate when using both channels. The NI PCI 6225 takes only 15 minutes for a complete warm-up and its calibration interval as defined by the vendor is 1 year. The PCI 6225 is run using the NIDAQmx driver software which is compatible with software packages/application development environments such as LabVIEW or LabWindows/CVI. The PFI/ Port 1 and Port 2 incorporated in this model can be used as static digital inputs. The digital inputs provided in this module are bidirectional; each one of them can be programmed as an input or output through software. This Multifunction DAQ comes equipped with 2,047 samples FIFO for waveform generation through its DO and another 2,047 samples FIFO is provided for waveform acquisition through DI. Moreover, the NI PCI-6225 offers 0 to 1 MHz DI or DO Sample Clock frequency. The PCI-6225 weighs 0.23 lb, and measures 3.8 x 6.1 in. in physical dimensions. It has recommended operating and storage temperature ranges of 0 ºC to 55 ºC and -20 ºC to 70 ºC respectively, non-condensing relative humidity range of 10 to 90%, operating and non-operating random vibrations of 0.3 grms and 2.4 grms respectively – all at a frequency range of 5 to 500 Hz.

Optical coupler input, relay output, digital IO module PXI bus 48 digital input and output module provides 24 optical coupling isolated input channels, 24 solid-state relay isolated output channels, input channel level voltage is 80VDC high, output channel switching level is 80VDC high, switching current is 160mA high, the channels are isolated from each other. Connector Type SCSI-100 female connector. peculiarity ◆ Isolation between channels ◆24 optical coupler input ◆24 solid state relay output ◆ Maximum 80V input/output voltage range ◆ Programmable input filter to eliminate buffeting ◆ Switching current 160mA ◆ Relay on-resistance: 1ω ◆ Input change detection ◆ Programmable power-on status setting Application program ◆ Automotive, aviation, industrial monitoring applications ◆ Aviation and laboratory research ◆ Biochemical automatic test and measurement

Analog input module is a device used to collect and process analog signals, which is usually composed of analog input circuit, analog-to-digital converter (ADC), filter and interface circuit. The analog input circuit is responsible for converting the external analog signal into a voltage or current signal, and then converting the analog signal into a digital signal through an analog-to-digital converter, and finally filtering and enhancing the signal through a filter, and finally output to a computer or other control equipment for processing and analysis. Working principle 1. Analog input circuit: The analog input circuit is a key part of the analog input module, which is mainly responsible for converting the external analog signal into a voltage or current signal. Common analog input circuits include resistance divider circuit, current voltage circuit and so on. The resistance divider circuit realizes the signal conversion through the series parallel combination of resistors, and the current voltage circuit realizes the signal conversion through the product of current and resistance. 2. Analog-to-digital converter (ADC) : The analog-to-digital converter is the core component in the analog input module, which is responsible for converting analog signals to digital signals. The analog-to-digital converter discretizes the input voltage or current into a series of digital values according to its magnitude, and converts the continuous analog signal into a discrete digital signal through a process of sampling and quantization. Common analog-to-digital converters include successive approximation analog-to-digital converters and integral analog-to-digital converters. 3. Filter: The filter is an important part of the analog input module, which is mainly used to filter and enhance the signal. The filter can improve the quality and stability of the signal by removing high-frequency noise and interference signals, thus improving the accuracy and reliability of subsequent processing. 4. Interface circuit: The interface circuit is the connection bridge between the analog input module and the computer or other control equipment, which is responsible for converting the digital signal into a form that the computer or other control equipment can recognize and process. Interface circuit usually adopts serial communication interface or parallel communication interface, and realizes data exchange and communication with computer or other control equipment through data line and control line.

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