描述
产品概述
NI PXI-6259是美国国家仪器（NI）推出的M系列多功能数据采集（DAQ）模块，基于PXI平台设计，适用于工业自动化、实验室测试及制造领域的高精度多信号处理任务。其集成模拟输入/输出、数字I/O及计数器功能，支持复杂同步操作，曾为中端DAQ应用的主流选择（注：部分型号已停用，建议参考替代型号PXIe-6363）。
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；
-分辨率与采样率：16位，单通道最高1.25 MS/s，多通道聚合1 MS/s；
-输入范围：±10 V（默认，支持扩展至高压测量）；
-精度特性：
-CMRR（共模抑制比）：92 dB（60 Hz）；
-输入阻抗：1 MΩ||100 pF。
模拟输出（AO）
-通道与性能：4路16位输出，更新速率2.8 MS/s（单通道）；
-动态特性：支持快速波形生成（如脉冲、正弦波）。
数字I/O（DIO）
-通道数：48线（32条高速DIO，支持10 MHz时钟）；
-功能：关联时钟（Correlated DIO）实现精确时序控制，支持边沿触发与脉冲捕获。
计数器/定时器
-资源：2个32位计数器，最大频率80 MHz；
-功能：
-正交编码器解码（X1/X2/X4模式）；
-PWM生成、频率测量及脉冲序列输出。
触发与同步
-触发模式：
-模拟边沿/窗口触发；
-数字边沿触发及外部参考时钟同步；
-多设备同步：
-通过PXI背板共享80 MHz时基或RTSI总线实现跨设备同步；
-支持AO时钟驱动DO任务实现硬件级同步。
技术特点
高精度校准：
-NI-MCal校准技术提升测量精度，支持NIST可追溯校准证书；
-建议每2年校准一次以维持性能。
信号调理扩展：
-兼容SCXI/SCC模块，扩展传感器接口与高压测量能力（如±250 V输入）。
软件生态：
-驱动支持：NI-DAQmx（兼容LabVIEW、C/C++等编程环境）；
-交互工具：LabVIEW SignalExpress LE简化快速原型开发。
Product Overview
NI PXI-6259 is an M series multifunctional data acquisition(DAQ)module launched by National Instruments(NI).It is designed based on the PXI platform and is suitable for high-precision multi-signal processing tasks in the fields of industrial automation,laboratory testing and manufacturing.It integrates analog input/output,digital I/O and counter functions,supports complex synchronization operations,and has been the mainstream choice for mid-range DAQ applications(Note:Some models have been disabled,it is recommended to refer to the alternative model PXIe-6363).
Core parameters and functions
Analog input(AI)
-Channel configuration:32 single-ended or 16 differential channels;
-Resolution and sampling rate:16 bits,maximum single channel 1.25 MS/s,multi-channel aggregation 1 MS/s;
-Input range:±10 V(default,support for extended to high voltage measurement);
-Accuracy characteristics:
-CMRR(common mode rejection ratio):92 dB(60 Hz);
-Input impedance:1 MΩ||100 pF.
Analog output(AO)
-Channels and performance:4 channels 16-bit outputs,update rate 2.8 MS/s(single channel);
-Dynamic features:Supports rapid waveform generation(such as pulses,sine waves).
Digital I/O(DIO)
-Number of channels:48 wires(32 high-speed DIOs,supporting 10 MHz clock);
-Function:Correlated DIO implements precise timing control,supporting edge triggering and pulse capture.
Counter/Timer
-Resources:2 32-bit counters,maximum frequency of 80 MHz;
-Function:
-Quadrature encoder decoding(X1/X2/X4 mode);
-PWM generation,frequency measurement and pulse sequence output.
Trigger and synchronization
-Trigger mode:
-Simulated edge/window trigger;
-Digital edge trigger and external reference clock synchronization;
-Multi-device synchronization:
-Cross-device synchronization is achieved through PXI backplane sharing 80 MHz time base or RTSI bus;
-Supports AO clock-driven DO tasks to achieve hardware-level synchronization.
Technical Features
High precision calibration:
-NI-MCal calibration technology improves measurement accuracy and supports NIST traceable calibration certificate;
-Calibration is recommended every 2 years to maintain performance.
Signal conditioning extension:
-Compatible with SCXI/SCC modules,extending sensor interface and high voltage measurement capabilities(such as±250 V input).
Software Ecology:
-Driver support:NI-DAQmx(compatible with programming environments such as LabVIEW,C/C++,etc.);
-Interactive Tools:LabVIEW SignalExpress LE simplifies rapid prototyping.
