Product Brief Description

The 781445-02 USB-6366 is a high-performance synchronous sampling multifunction data acquisition (DAQ) device independently developed by National Instruments (NI), belonging to the classic NI X Series industrial test and measurement product line. As the key portable high-precision data acquisition component specially designed for industrial test automation, laboratory measurement and control, and high-speed signal synchronous acquisition scenarios that have extremely strict requirements for sampling accuracy and timing synchronization performance, it is widely deployed in industrial product performance testing, automotive component durability testing, university scientific research experiment measurement and other fields, responsible for completing high-speed synchronous acquisition of multi-channel analog signals, high-precision analog signal output, digital signal input and output, and high-precision timing counting functions, providing the most fundamental high-reliability data acquisition guarantee for various high-precision test and measurement systems.

Core Technical Specifications

• Manufacturer: National Instruments (NI), original industrial test and measurement grade production standard
• Product Category: X Series synchronous sampling multifunction USB DAQ device, official part number 781445-02
• Physical Parameters: Compact industrial-grade sealed casing design, the PCB is fully enclosed in the protective shell, net weight about 0.7kg, front panel bolt terminal connection mode, no need for additional signal adapter board during on-site wiring
• Analog Input Performance: 8 fully differential analog input channels, 16-bit ADC resolution, maximum synchronous sampling rate up to 2 MS/s per channel, no single-ended input mode, input range supports ±1V, ±2V, ±5V, ±10V four gears, the maximum absolute accuracy under ±10V range is 2688 μV
• Analog Output Performance: 2 independent analog output channels, 16-bit DAC resolution, maximum update rate up to 3.33 MS/s per channel, output range ±10V, which can meet the high-speed analog signal generation demands of various test systems
• Digital and Timing Performance: 24 bidirectional digital I/O channels, 4 independent 32-bit counter/timers, which can be used for PWM signal generation, encoder signal acquisition, frequency measurement, event counting and other functions
• Memory and Interface: Built-in 64 MS large-capacity analog input FIFO cache, using USB 2.0 high-speed bus communication, with 2m dedicated locking USB cable and 12V 3A desktop power supply in the standard package
• Timing and Synchronization Technology: Equipped with NI exclusive NI-STC3 timing and synchronization chip, with independent analog and digital timing engines, supporting retriggerable measurement tasks, the timing resolution can reach 10 ns, and the timing accuracy is 50 ppm of the sampling rate
• Operating Environment: 0°C to +55°C industrial working temperature range, 5%-95% non-condensing relative humidity, the analog input channel has ±36V overvoltage protection when powered on, effectively avoiding the device damage caused by on-site signal misconnection

Key Core Functions

• Multi-Channel True Synchronous Sampling: Different from the ordinary sequential sampling DAQ devices on the market, this device supports 8 analog input channels to complete 2 MS/s high-speed sampling at the same time, which can accurately capture the phase relationship between multiple paths of dynamic signals such as vibration, noise and voltage, and will not produce phase deviation caused by sequential switching of channels, which is especially suitable for high-precision test scenarios such as multi-channel dynamic signal synchronous analysis.
• Advanced Timing and Retrigger Measurement: The exclusive NI-STC3 timing technology makes the device have independent analog and digital timing engines, which can realize complex measurement functions such as retriggerable multi-segment sampling, multi-task parallel timing control, and the timing control precision is far higher than that of ordinary USB DAQ products, which can meet the complex test timing demands of various automated test systems.
• Rich Multifunctional I/O Integration: The device integrates analog input, analog output, digital I/O and high-performance counter/timer functions in one, no need to purchase multiple separate function modules, which can replace the combination of multiple traditional test instruments, effectively reducing the hardware cost and cabinet space occupation of the test system, and the system integration difficulty is reduced by more than 40%.
• NI-DAQmx Driver Full Compatibility: The device comes with the official NI-DAQmx dedicated driver and configuration utility, which can seamlessly connect with NI LabVIEW, LabWindows/CVI and other test development software, no need to write complex underlying driver code, users can quickly complete the configuration and development of the test system, and the development cycle is greatly shortened.
• Industrial-Grade Sealed Anti-Interference Design: The PCB is fully enclosed in the metal protective shell, which can effectively shield the external strong electromagnetic interference, and the signal measurement stability in the industrial site strong electromagnetic environment is far higher than that of ordinary consumer-grade data acquisition cards, which can ensure the long-term stable and reliable operation of the test system.

Typical Application Scenarios

• Industrial test automation: Automotive electronic component performance test workstation, realizing high-speed synchronous acquisition of multi-channel sensor signals in the component durability test process.
• Scientific research experiment: University laboratory dynamic signal measurement and control system, realizing high-precision synchronous acquisition of multi-channel physical experiment signals.
• Aerospace industry: Aerospace component performance verification test system, realizing high-speed and high-precision measurement of dynamic parameters of test pieces in the vibration test process.
• Power electronics industry: Motor drive system performance test platform, realizing synchronous acquisition of multi-channel voltage, current and vibration signals of the motor.
• Industrial transformation and upgrading projects: Spare parts replacement and system maintenance of old NI X Series DAQ systems that have been in operation for many years in various test sites.

Installation and Maintenance Guidelines

• Strict anti-static protection must be implemented before installation: operators must wear a reliably grounded anti-static wrist strap to avoid static electricity damaging the precision ADC chip and timing processing components on the board.
• The analog signal wiring must strictly follow the NI DAQ system wiring specifications, use dedicated double-shielded twisted-pair signal cables, and the shielding layer must be reliably single-ended grounded, and the high-voltage power wiring and low-voltage signal wiring must be routed separately to avoid electrical interference affecting the measurement accuracy.
• After installation, perform full function test and sampling accuracy calibration of the device through the dedicated NI-DAQmx configuration software, confirm that the analog input function, analog output function, digital I/O function and counter/timer function of each channel fully meet the system design requirements.
• Regularly check the operation state of the device during daily operation, regularly clean the dust accumulated on the surface of the casing every 2 years, and send it to the official NI authorized service center for external calibration every 2 years, which can effectively extend the service life of this DAQ device to more than 8 years.

Market and Supply Status

As a classic supporting high-performance synchronous sampling DAQ device of NI X Series, 781445-02 USB-6366 is still in the official active sales state. The official reference price is 54070 CNY (excluding tax), and the official delivery cycle is 16-17 weeks. Multiple professional test and measurement equipment suppliers in Xiamen, Fujian have sufficient spot stocks of original imported units. The product comes with 1 year of official basic quality assurance service, which can be delivered quickly within 1-3 working days, fully meeting the spare parts replacement and maintenance demands of old NI DAQ test systems that have been in operation for many years around the world.

Frequently Asked Questions