PXIe-6321 16-Channel Multifunction I/O Module
The PXIe-6321 is a PXI Express multifunction data acquisition module designed for automated measurement, control, laboratory research and production-test applications. It combines analog input, analog output, digital I/O and counter/timer functions in one compact module.
The device provides 16 single-ended or eight differential analog input channels with 16-bit resolution and an aggregate sampling rate of up to 250 kS/s. It also includes two analog outputs, 24 digital I/O lines and four 32-bit counter/timers.
PXIe-6321 Key Features
- 16 single-ended or 8 differential analog inputs
- 16-bit analog input resolution
- 250 kS/s maximum aggregate analog input rate
- Two 16-bit analog outputs
- Up to 900 kS/s analog output update rate
- 24 bidirectional digital I/O lines
- Four 32-bit general-purpose counter/timers
- ±10 V maximum analog input range
- Analog and digital triggering
- NI-STC3 timing and synchronization technology
- PXI Express bus interface
- NI-DAQmx software support
PXIe-6321 Technical Specifications
| Product Model | PXIe-6321 |
|---|---|
| Product Type | PXI Express multifunction I/O device |
| Analog Inputs | 16 single-ended or 8 differential |
| Analog Input Resolution | 16 bits |
| Maximum AI Sample Rate | 250 kS/s aggregate |
| Input Ranges | Software selectable, up to ±10 V |
| Analog Outputs | 2 |
| Analog Output Resolution | 16 bits |
| Maximum AO Update Rate | 900 kS/s |
| Digital I/O | 24 bidirectional lines |
| Counter/Timers | 4 × 32-bit |
| Timing Technology | NI-STC3 |
| Bus Interface | PXI Express |
| Software | NI-DAQmx, LabVIEW, LabWindows/CVI and supported text-based languages |
Analog Input Measurements
The PXIe-6321 can measure voltage from sensors, signal-conditioning circuits, power-electronics controls and other devices. Software-selectable input ranges help improve measurement resolution when working with signals smaller than the full ±10 V range.
The multiplexed analog input architecture is suitable for applications that require multiple measurement channels without simultaneous sampling. The aggregate sampling rate is shared among the channels included in a hardware-timed acquisition.
Analog Output and Control
Two analog output channels can generate programmable voltage signals for device stimulus, setpoint control and closed-loop testing. Hardware-timed waveform generation allows the output operation to be coordinated with analog acquisition and digital events.
Digital I/O and Counter Functions
The 24 bidirectional digital lines support static and hardware-timed digital operations. Four 32-bit counters can perform encoder measurements, frequency and period measurements, event counting, pulse-width measurements and pulse-train or PWM generation.
PXIe-6321 Applications
- Automated functional testing
- Sensor and voltage measurement
- Laboratory data acquisition
- Motor and actuator control
- Encoder and frequency measurement
- Hardware-in-the-loop test systems
- Production-line test equipment
- Research and educational laboratories
PXIe-6321 Accessories
The module can be connected to compatible 68-pin shielded cables and terminal blocks such as the SHC68-68-EPM cable and SCB-68A connector block. Accessory selection should be based on shielding, terminal style and the required analog and digital signals.
PXIe-6321 Troubleshooting
The module is not detected
Verify that the module is fully installed in a compatible PXI Express slot. Check chassis power, controller communication and the installed NI-DAQmx version.
Analog measurements are noisy
Confirm the terminal configuration, grounding and input range. Use shielded cabling, separate analog wiring from switching loads and avoid leaving unused measurement inputs floating.
The sample rate is lower than expected
The 250 kS/s specification is an aggregate rate. When multiple analog input channels are scanned, the available rate is divided across the active channels.
Frequently Asked Questions
Does the PXIe-6321 support differential inputs?
Yes. It supports up to eight differential or 16 single-ended analog input channels.
Which driver controls the PXIe-6321?
The module is programmed through NI-DAQmx and can be used with LabVIEW and supported C, C++ and .NET environments.
Request a Quote for PXIe-6321
Contact us for current availability, configuration assistance and project pricing for the PXIe-6321 Multifunction I/O Module. We can also help identify compatible cables, terminal blocks, chassis and controllers.
