Description
NI cDAQ-9174
Technical Specifications 4 C Series module slots; USB 2.0 high-speed host interface; 4 independent 32-bit general-purpose counter/timers; timing resolution 12.5 ns; timing accuracy 50 ppm of sample rate; operating temperature range -20 ℃ to +55 ℃; external DC power supply input.
Functional Features Controls hardware-timed measurement tasks for each C Series module; supports simultaneous independent sampling rates across multiple modules; counter channels support quadrature encoder, pulse width and frequency measurement; streams measurement data to PC through NI-DAQmx driver; hot-swap of C Series modules is supported.
Application Scenarios Portable sensor testing, mechanical vibration measurement, automotive component bench test, temperature and strain acquisition, educational laboratory measurement system.
Material Composition Aluminum alloy outer casing for electromagnetic shielding; backplane PCB with high-speed digital signal traces; USB controller chip; plastic front panel with status LEDs.
Structural Characteristics Compact desktop chassis design; front panel with module slot status indicators; rear panel equipped USB port, power input and external trigger terminal; internal backplane bus for timing synchronization among slots.
Working Principle The chassis receives timing configuration and measurement commands from host PC via USB. It distributes shared clock and trigger signals to all installed C Series modules. Measurement data collected by I/O modules is buffered in on-board FIFO and transferred to PC memory by DMA channel. Counter circuits process pulse and encoder signals independently.
Installation Requirements Place on stable desktop or mount on test panel; use NI certified external power adapter; route USB cable with shielding for high sampling rate tasks; avoid stacking other heat-generating equipment directly on top of the chassis.
Operation Notes Disconnect USB and power before adding or removing C Series modules; keep ventilation openings unobstructed during continuous measurement; use NI-DAQmx compatible module models only.
