Product Introduction
Земля NI PXI-6251 is a high-performance multifunction data acquisition (DAQ) module designed for PXI-based automated testing, industrial measurement, laboratory research, and control applications. As part of the NI M Series DAQ family, it combines analog input, analog output, digital I/O, and counter/timer functions in a single PXI module.
Featuring 16-bit analog measurement resolution, up to 1.25 MS/s sampling rate, 16 analog input channels, two analog output channels, 24 digital I/O lines, and two 32-bit counters, the PXI-6251 provides a flexible and scalable solution for multifunction measurement systems.
Product Overview
Земля PXI-6251 is designed for engineers who need accurate and synchronized data acquisition within PXI automated test platforms. It provides multiple I/O resources required for sensor measurement, signal generation, device control, and timing applications.
The module uses NI M Series technology with onboard timing engines and NI-DAQmx support, enabling precise hardware-timed acquisition and generation tasks. It can be integrated with PXI chassis, PXI controllers, and other modular instruments to build complete automated measurement systems.
Key Features
16 Analog Input Channels
The PXI-6251 provides high-density analog acquisition capability for multiple sensor and signal measurements.
- 16 analog input channels
- 16-bit ADC resolution
- Up to 1.25 MS/s sampling rate
- Multiple input ranges
- Single-ended and differential measurement support
Advantage: Supports multi-channel voltage measurement for industrial, laboratory, and automated test applications.
High-Speed Analog Input Performance
The module provides accurate acquisition for dynamic signals.
- 1.25 MS/s maximum aggregate sampling
- Hardware-timed acquisition
- Analog triggering support
- Synchronized measurement
- Low-latency data transfer
Advantage: Enables reliable measurement of changing electrical signals in real-time applications.
Two Analog Output Channels
The PXI-6251 includes analog output capability for waveform generation and control.
- 2 analog output channels
- 16-битное разрешение ЦАП
- Hardware-timed waveform generation
- Voltage generation
- Signal simulation
Advantage: Allows one PXI module to perform both measurement and stimulus generation.
24 Digital I/O Lines
Integrated digital I/O provides flexible control and communication capability.
- 24 programmable digital I/O lines
- TTL-compatible signals
- Static digital control
- Hardware-timed digital operations
- External device interfacing
Advantage: Simplifies control of relays, triggers, fixtures, and external equipment.
Two 32-Bit Counter/Timers
The PXI-6251 provides integrated timing resources for measurement and control applications.
- 2 × 32-bit counters
- Подсчет событий
- Frequency measurement
- Генерация импульсов
- Encoder measurement
Advantage: Eliminates the need for additional timing hardware in many applications.
NI-STC 2 Timing Technology
The onboard timing engine provides accurate synchronization between measurement functions.
- Hardware timing control
- Синхронизация триггера
- Clock routing
- Multi-function synchronization
- Deterministic acquisition
Advantage: Provides reliable timing performance for automated test systems.
PXI Modular Architecture
The PXI-6251 integrates into scalable PXI-based test systems.
- PXI bus interface
- Modular instrument architecture
- Shared chassis timing
- Синхронизация межмодульных блоков
- Scalable system expansion
Advantage: Enables integration with other PXI instruments including switches, digitizers, RF modules, and controllers.
Technical Specifications
| Параметр | Описание |
|---|---|
| Product Type | PXI Multifunction M Series DAQ Module |
| Analog Input Channels | 16 Channels |
| ADC Resolution | 16 Bits |
| Maximum Sampling Rate | 1,25 МСм/с |
| Input Configuration | Single-Ended / Differential |
| Analog Output Channels | 2 Channels |
| DAC Resolution | 16 Bits |
| Цифровой ввод-вывод | 24 Lines |
| Counter/Timers | 2 × 32-Bit |
| Timing Technology | NI-STC 2 |
| Шинный интерфейс | PXI |
| Connector | 68-Pin VHDCI |
| Driver | НИ-DAQmx |
| Programming Support | LabVIEW, Python, C/C++, C#, .NET |
Software Ecosystem
The PXI-6251 integrates with the National Instruments software ecosystem for automated measurement and test applications.
- NI-DAQmx: Provides hardware configuration, acquisition, timing, triggering, and programming APIs.
- LabVIEW: Enables graphical development of automated measurement and control systems.
- NI MAX: Supports device configuration, diagnostics, and hardware management.
- TestStand: Integrates DAQ functionality into automated production test sequences.
- Python, C/C++, C#, .NET: Supports custom DAQ application development.
Industries
- Automated Test Equipment
- Промышленная автоматизация
- Electronics Manufacturing
- Automotive Testing
- Аэрокосмическая и оборонная промышленность
- Исследовательские лаборатории
- Тестирование полупроводников
- Энергетические системы
Applications
Автоматизированные испытательные системы
The PXI-6251 provides multifunction measurement capability for production and validation testing.
- Functional testing
- Electronic validation
- Production inspection
- Test fixture control
Системы сбора данных
The module supports multi-channel sensor and voltage measurement applications.
- Sensor monitoring
- Voltage acquisition
- Регистрация данных
- Signal analysis
Control and Automation
Integrated analog output and digital I/O enable closed-loop control applications.
- Equipment control
- Signal generation
- Relay control
- Промышленная автоматизация
Laboratory Research
The PXI-6251 provides flexible measurement capability for experimental systems.
- Scientific experiments
- Prototype validation
- Measurement automation
- Research testing
Comparison with Similar Products
| Модель | Основное различие | Best Application |
|---|---|---|
| NI PXI-6251 | 16-channel M Series multifunction DAQ with 1.25 MS/s sampling and analog output. | General PXI automated measurement |
| NI PXI-6221 | Lower-speed M Series DAQ module for general-purpose acquisition. | Basic measurement systems |
| NI PXI-6259 | Higher-channel-count M Series DAQ with expanded I/O resources. | Large-scale data acquisition |
| NI PXIe-6343 | Newer X Series PXI Express DAQ with improved timing architecture. | Modern PXI Express systems |
Recommended Related Products
| NI PXI-1045 | 18-slot PXI chassis for large modular test systems. |
| NI PXIe-8880 | High-performance embedded controller for PXI-based test platforms. |
| NI PXI-6259 | High-channel-count multifunction DAQ module. |
| NI PXIe-6343 | PXI Express multifunction DAQ module with advanced timing features. |
Why Choose PXI-6251?
- 16-bit high-resolution analog input
- 1.25 MS/s acquisition speed
- 16 analog input channels
- 2 analog output channels
- 24 digital I/O lines
- 2 integrated 32-bit counters
- NI-DAQmx software support
- PXI modular system integration
- Suitable for automated test and measurement applications
Frequently Asked Questions
What type of applications is PXI-6251 used for?
The PXI-6251 is commonly used for automated testing, data acquisition, industrial measurement, electronic validation, and laboratory research applications.
What is the difference between PXI-6251 and PXIe-6343?
The PXI-6251 is an M Series PXI DAQ module, while the PXIe-6343 is a newer X Series PXI Express DAQ module with updated timing architecture and higher system bandwidth.
Does PXI-6251 support LabVIEW?
Yes. The PXI-6251 is fully supported by NI-DAQmx and integrates with LabVIEW, TestStand, and other NI software environments.
Заключение
Земля NI PXI-6251 multifunction DAQ module provides a flexible combination of analog input, analog output, digital I/O, and counter functionality for PXI automated test systems. With 16-bit resolution, 1.25 MS/s acquisition, and NI-DAQmx software support, it remains a reliable solution for industrial measurement, laboratory testing, and automated validation applications.
