NI Data Acquisition Systems

NI data acquisition systems combine measurement hardware, signal conditioning, and software to capture electrical signals and convert sensor outputs into usable data. Engineers use these systems for laboratory research, manufacturing tests, aerospace validation, equipment monitoring, and product development. Depending on the hardware selected, an NI DAQ system can measure voltage, temperature, vibration, strain, pressure, or digital events while supporting coordinated timing and automated data collection.

NI offers several hardware formats to suit different installations. USB devices provide convenient connectivity for portable measurements and benchtop applications. The USB-6210, available under part number 779675-01, provides 16-bit analog acquisition, up to 16 single-ended or eight differential inputs, digital I/O, and two counters. PCI and PCI Express boards install inside compatible computers, making them useful for dedicated test stations where internal expansion slots are available.

Established NI multifunction DAQ families include E Series, M Series, and X Series. These generally correspond to 60xxE, 62xx, and 63xx model families. M Series examples include the PCI-6221 and PXI-6251. X Series options include the PCIe-6363, part number 781051-01, and PXIe-6363, part number 781056-01. Both 6363 models combine 32 analog inputs, four analog outputs, 48 digital I/O lines, and four counters, with interface selection determining how they integrate into a system.

PXI and PXI Express DAQ modules operate within compatible chassis, allowing acquisition hardware to share a platform with other test instruments. Chassis timing and triggering resources help coordinate supported modules. CompactDAQ takes a sensor-focused modular approach: the eight-slot cDAQ-9178 USB chassis, part number 781156-01, accepts compatible C Series I/O modules. Examples include the NI-9213 for thermocouples, NI-9234 for sound and vibration, and NI-9237 for bridge-based strain and load measurements.

Selecting a system requires more than comparing channel counts. Consider input ranges, resolution, accuracy, isolation, sensor excitation, and sampling architecture. Multiplexed inputs share conversion resources, while simultaneous-sampling hardware captures multiple channels together. Also confirm whether a specified sampling rate applies per channel or across the acquisition task. Suitable cables, terminal blocks, grounding, and signal conditioning are essential to reliable measurements.

Plan for future expansion by reserving channels and chassis slots where practical. Document existing sensor wiring, trigger routes, calibration records, and acquisition settings before replacing any hardware. Similar headline specifications do not guarantee interchangeability; connector pinouts, timing behavior, and supported software can differ between product generations.

Many NI DAQ products use NI-DAQmx for configuration and programming. Software compatibility must be checked against the exact device, operating system, and application version, especially when maintaining older installations. Apex Waves helps customers source legacy NI acquisition hardware and explore repair and calibration options. Matching model numbers, part numbers, connections, and software requirements can help preserve existing test systems without unnecessary redesign.