Product Overview
The National Instruments NI-9223 is a simultaneous sampling analog input module for CompactDAQ and CompactRIO systems. It provides four analog input channels with 16 bit resolution and a maximum sampling rate of 1 MS/s per channel. The module is designed for applications that require fast, correlated measurement of multiple signals.
The NI-9223 is part of the NI C Series platform, which offers modular signal conditioning for data acquisition and control. The module is used in power measurement, motor and inverter test, multi sensor dynamic response testing, and other applications where channel to channel timing matters.
Simultaneous Sampling
The four analog input channels sample at the same time, which preserves the phase relationship between signals. This is essential when computing power, phase angle, or transfer functions from multiple measured signals. Sequential sampling would introduce a timing offset that must be corrected mathematically, whereas simultaneous sampling avoids that error at the source.
Simultaneous sampling also supports multi sensor correlation, such as comparing acceleration, force, and displacement during a dynamic test. Engineers can trust that all channels represent the same instant, which simplifies analysis and improves confidence in derived results.
Resolution and Speed
The module provides 16 bit resolution and a maximum sampling rate of 1 MS/s per channel. The plus or minus 10 V input range covers common industrial and laboratory signal levels. The combination of resolution and speed supports capture of fast transients as well as accurate measurement of smaller signal components.
Engineers should verify that the total data rate for all active channels can be sustained by the chassis and host configuration. Anti alias filtering and input protection help maintain signal quality and protect the module. Good probing and grounding practice are important at high sampling rates.
System Integration
The NI-9223 is designed for use in CompactDAQ and CompactRIO chassis. It supports the timing and synchronization features of the C Series platform, including sample clocks and triggers. The module can be synchronized with other analog input, analog output, digital, and counter modules so that measurements from different signal types can be compared in time.
The module is supported by NI-DAQmx driver software. It can be programmed with LabVIEW, LabWindows/CVI, Measurement Studio, and other NI-DAQmx compatible environments. Engineers can configure channels, set sampling rates, select input ranges, and apply scaling through standard software tools.
Wiring and Installation
Wiring should be planned so that each input is associated with a known signal and scaling. Shielded cable and separation from high current conductors help reduce noise pickup, especially in power and motor test applications. The connector and accessory arrangement should match the chassis in use, and cables should be strain relieved where they may move.
The module should be installed in a compatible chassis with adequate ventilation. Engineers should verify the power budget for the planned module mix and follow the chassis documentation for slot placement and thermal considerations. These steps help ensure reliable operation over the life of the system.
Typical Applications
Power measurement with simultaneous voltage and current channels
Motor and inverter test with correlated signals
Multi sensor dynamic response testing
Transient and fast signal capture
CompactDAQ and CompactRIO measurement systems
Laboratory research requiring channel timing accuracy
The NI-9223 provides four 16 bit simultaneous sampling analog input channels at up to 1 MS/s each for CompactDAQ and CompactRIO. Its correlated measurement capability makes it suitable for power, motor, and dynamic signal applications.
