PCI-DIO-32HS - NI Digital I/O Device

Description

The PCI-DIO-32HS, also known as the PCI 6533, (Part Number: 777314-01) is a completely jumperless, switchless Digital I/O Device from National Instruments. This model is designed for CompactPCI or PXI chassis and PCI busses. Powered with the NI proprietary MITE PCI interface, the PCI DIO-32HS offers bus-master operation, burst PCI transfers, and high-speed DMA (Direct memory access) controllers. This Digital I/O Device comes equipped with the NI DAQ-DIO chip. The National Instruments DAQ-DIO chip comes equipped with handshaking, pattern generation, and two separate channels of digital input and digital output. Each channel offers a selectable data path width, 16 and 32-bit counters, a handshaking controller with six timing protocols, 24 mA outputs, star /stop trigger detection, and more. The Pattern I/O and Handshaking I/O functions of the PCI DIO-32HS allow the user to input or output patterns with timing control. The 32 digital input/output lines offered by this device are divided as four 8-bit ports. For handshaking or pattern I/O, these ports can be used in configurations of two 8-bits or two 16-bit groups or one 32-bit group. The channels have a maximum rate of up to 2 MHz for pattern I/O, and voltage levels of 5 V TTL/CMOS. The digital transmission on PCI DIO-32HS is managed by a single 68-pin male SCSI-II cable connector. Moreover, this Digital I/O Device enables the users to select power-on states for the data and control lines independently. This device utilizes the RTSI bus or the PXI trigger bus for receiving and sending trigger and clock signals to and from other connected devices. Thus, the PCI DIO-32HS can also be utilized for the construction of synchronized systems with a massive number of digital input and output lines. The PCI DIO-32HS operates using the NI-DAQ driver software which is compatible software packages/ application development environments (ADEs) like LabVIEW, LabWindows/CVI, ComponentWorks, or VirtualBench. The device has a recommended operating temperature range of 0 to 55° C.

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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