描述
产品概述
NI PXI-6289是美国国家仪器（National Instruments）推出的PXI总线多功能I/O模块，属于M系列高精度数据采集（DAQ）产品。其设计融合模拟输入/输出、数字I/O、计数器/定时器及同步触发功能，适用于工业自动化、实验室研究及复杂控制场景。
核心参数与功能
模拟输入（AI）
-通道配置：32单端或16差分通道，支持±0.1 V至±10 V输入范围；
-分辨率与采样率：18位，单通道最大625 kS/s，多通道聚合500 kS/s；
-精度与滤波：
-绝对精度（滤波开）：±28μV（±0.1 V范围）至±980μV（±10 V范围）；
-可编程40 kHz低通滤波器，降低噪声干扰。
模拟输出（AO）
-通道与性能：4路16位输出，支持高动态信号生成（最大速率2.:MS/s）。
数字I/O（DIO）
-通道数：48条双向数字线，其中32条支持差分时钟同步（10 MHz）；
-电平兼容性：支持24 V工业信号电平。
计数器/定时器
-资源：2个32位独立计数器，最大频率80 MHz；
-功能：脉冲序列生成、频率测量、编码器接口及高精度定时控制。
触发与同步
-触发模式：模拟边沿/窗口触发、数字边沿触发，支持外部数字触发器；
-同步机制：兼容PXI RTSI总线，实现多机箱协同测量。
物理接口与扩展性
-连接器：68针VHDCI接口，支持高密度信号接入；
-信号调理：兼容SCXI/SCC模块，扩展高压、温度等测量能力。
功能特点
高集成度：单设备整合模拟、数字及计数器功能，减少系统复杂度；
隔离保护：组隔离设计保障高压环境下的安全测量（如42V汽车系统）；
低噪声设计：输入阻抗>10 GΩ，输入偏置电流±100 pA，适用于高灵敏度传感器；
校准技术：内置NIST可追溯校准证书，支持长期稳定性（建议每2年校准）。
典型应用场景
工业控制：多通道信号采集与实时反馈（如锅炉燃烧控制、水位监测）；
科研实验：高精度激励/响应测试（如声纳信号分析、超声波检测）；
汽车电子：42V系统测试及雷达、电机控制信号处理。
Product Overview
NI PXI-6289 is a PXI bus multifunction I/O module launched by National Instruments,and belongs to the M series high-precision data acquisition(DAQ)product.Its design combines analog input/output,digital I/O,counter/timer and synchronous trigger functions,and is suitable for industrial automation,laboratory research and complex control scenarios.
Core parameters and functions
Analog input(AI)
-Channel configuration:32 single-ended or 16 differential channels,supporting±0.1 V to±10 V input range;
-Resolution and sampling rate:18-bit,maximum single channel 625 kS/s,multi-channel aggregation of 500 kS/s;
-Accuracy and filtering:
-Absolute accuracy(filtered on):±28μV(±0.1 V range)to±980μV(±10 V range);
-Programmable 40 kHz low-pass filter to reduce noise interference.
Analog output(AO)
-Channel and performance:4 channels 16-bit outputs,supporting high dynamic signal generation(maximum rate 2.:MS/s).
Digital I/O(DIO)
-Number of channels:48 bidirectional digital lines,32 of which support differential clock synchronization(10 MHz);
-Level compatibility:Supports 24 V industrial signal levels.
Counter/Timer
-Resources:2 32-bit independent counters,maximum frequency of 80 MHz;
-Functions:pulse sequence generation,frequency measurement,encoder interface and high-precision timing control.
Trigger and synchronization
-Trigger mode:simulate edge/window trigger,digital edge trigger,support external digital trigger;
-Synchronization mechanism:compatible with PXI RTSI bus,realizing multi-chassis collaborative measurement.
Physical interface and scalability
-Connector:68-pin VHDCI interface,supports high-density signal access;
-Signal conditioning:compatible with SCXI/SCC modules,expanding high voltage,temperature and other measurement capabilities.
Functional Features
High integration:single-device integrates analog,digital and counter functions to reduce system complexity;
Isolation protection:The group isolation design ensures safe measurement in high-voltage environments(such as 42V automotive systems);
Low noise design:input impedance>10 GΩ,input bias current±100 pA,suitable for high sensitivity sensors;
Calibration technology:Built-in NIST traceable calibration certificate,supports long-term stability(calibration is recommended every 2 years).
Typical application scenarios
Industrial control:multi-channel signal acquisition and real-time feedback(such as boiler combustion control,water level monitoring);
Scientific research experiments:high-precision excitation/response tests(such as sonar signal analysis,ultrasonic detection);
Automotive Electronics:42V system testing and radar and motor control signal processing.
