Test & Measurement Automation Solution — National Instruments PCIE-6321 | X Series
Where This Product Is Used
The NI PCIE-6321 is a high-performance PCIe multifunction data acquisition (DAQ) card engineered for demanding test, measurement, and industrial automation environments. Engineers deploy this module across a wide range of application scenarios:
- Automated Test Equipment (ATE) — Stimulus-response testing of electronic assemblies, PCB functional test, and end-of-line production verification.
- Laboratory Instrumentation — Precision analog signal acquisition for R&D benches, sensor characterisation, and waveform capture in physics and materials labs.
- Industrial Process Monitoring — Real-time acquisition of temperature, pressure, flow, and vibration signals from transducers and transmitters on factory floors.
- Motion & Machine Control — Encoder feedback reading, digital I/O interlocking, and analog command output for servo drives and actuators.
- Power Electronics Testing — High-speed sampling of voltage and current waveforms during inverter, converter, and UPS validation cycles.
- Academic & Research Platforms — LabVIEW-based teaching rigs, control-systems experiments, and signal-processing research requiring deterministic timing.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | PCIE-6321 |
| Form Factor | PCIe ×1 (half-length, low-profile) |
| Analog Inputs (AI) | 16 single-ended / 8 differential |
| AI Resolution | 16-bit |
| AI Sample Rate | 250 kS/s (aggregate) |
| AI Input Range | ±0.1 V to ±10 V (8 ranges) |
| Analog Outputs (AO) | 2 channels, 16-bit, 900 kS/s |
| Digital I/O (DIO) | 24 lines (bidirectional), 3.3 V / 5 V TTL |
| Counter/Timers | 4 × 32-bit, 100 MHz timebase |
| Bus Interface | PCI Express Gen 1 ×1 |
| Onboard Memory | 4095-sample AI FIFO, 8191-sample AO FIFO |
| Trigger Types | Digital start, reference, pause; analog start & reference |
| Operating Temperature | 0 °C to 55 °C |
| Storage Temperature | −20 °C to 70 °C |
| Power Consumption | +3.3 V @ 0.5 A; +12 V @ 0.5 A |
| Dimensions (L × H) | 168.3 mm × 111.15 mm |
| OS Support | Windows 10/11, Windows Server, Linux (NI-DAQmx) |
| Software | NI-DAQmx, LabVIEW, LabWindows/CVI, ANSI C/C++, Python, .NET |
Why Engineers Specify This Model
- X Series Architecture — NI-STC3 timing engine delivers independent, simultaneous AI/AO/DIO/counter operations without resource conflicts.
- 16-bit Resolution at 250 kS/s — Balances throughput and accuracy for the majority of sensor and signal-conditioning applications without overpaying for higher-speed tiers.
- PCIe Bus — Lower latency and higher sustained DMA throughput versus legacy PCI, critical for continuous-streaming applications.
- Analog Triggering — Hardware analog start and reference triggers eliminate software jitter for time-critical capture events.
- NI-DAQmx Driver Ecosystem — Single API across all NI DAQ hardware; existing code migrates without rewrite when scaling to higher-channel-count systems.
- Compact Low-Profile PCIe Card — Fits 1U rack-mount industrial PCs and compact chassis where full-height cards cannot be accommodated.
Complete System Bill of Materials
A typical PCIE-6321 deployment requires the following accessories — all sourceable through Konmask.com:
- Connector Block — NI SCB-68A (68-pin shielded I/O connector block) or NI CB-68LP (low-cost unshielded)
- Cable — NI SHC68-68-EPM (shielded, 1 m or 2 m) for noise-sensitive environments
- Signal Conditioning — NI SCXI or NI 9900-series modules for thermocouple, strain gauge, or IEPE sensor inputs
- Chassis / PC — Any PCIe ×1 or wider slot; NI recommends dedicated DAQ PCs for deterministic performance
- Software License — NI-DAQmx Base (free) or NI LabVIEW Full/Professional for graphical programming
Compliance & Industry Standards
- CE Marking — EMC Directive 2014/30/EU; Low Voltage Directive 2014/35/EU
- FCC Part 15, Class A (USA)
- RoHS 2 Compliant (Directive 2011/65/EU)
- WEEE Directive — registered for responsible end-of-life disposal
- ISO 9001 — manufactured under NI’s certified quality management system
Quality Assurance & Sourcing
Konmask.com sources the PCIE-6321 exclusively through authorised distribution channels and verified secondary-market suppliers with documented chain-of-custody records. Every unit offered undergoes the following before dispatch:
- Visual inspection for physical damage, bent pins, and label integrity
- Firmware version verification against NI’s published release matrix
- Functional power-on test with NI-DAQmx self-calibration routine
- Anti-static packaging with humidity indicator card
- Serialised shipment documentation for traceability
How to Source This Part
- Add to Cart — Click the purchase button above; stock levels are updated in real time.
- Request a Quote — For orders of 2+ units or project-based procurement, email [email protected] for volume pricing.
- Lead Time — In-stock units ship within 1–3 business days; cross-border orders to EU/US typically arrive in 7–14 business days via DHL/FedEx.
- Payment — T/T bank transfer, PayPal, and major credit cards accepted; proforma invoice available on request.
- Export Documentation — Commercial invoice, packing list, and certificate of origin provided for all international shipments.
Application-Specific FAQ
Q: Can the PCIE-6321 acquire signals from thermocouples directly?
A: No — thermocouples require cold-junction compensation and amplification. Pair the card with an NI SCXI-1102 or NI 9211 module and appropriate signal-conditioning chassis.
Q: Is simultaneous sampling supported on all 16 analog input channels?
A: The PCIE-6321 uses a single multiplexed ADC; channels are sampled sequentially at up to 250 kS/s aggregate. For true simultaneous sampling, consider the NI PCIE-6341 or NI PXIe-4300 series.
Q: What is the maximum DIO sink/source current per line?
A: Each DIO line can source or sink up to 24 mA; the port aggregate limit is 128 mA. Use external buffers (e.g., 74HC244) for driving relay coils or high-capacitance loads.
Q: Can this card be used in a Linux-based industrial PC?
A: Yes. NI-DAQmx for Linux (kernel 4.x and later) supports the PCIE-6321. Python nidaqmx package and C API are available; LabVIEW for Linux is not supported on this card generation.
Q: Is the PCIE-6321 compatible with NI MAX (Measurement & Automation Explorer)?
A: Yes. NI MAX auto-detects the card after NI-DAQmx driver installation and provides self-test, self-calibration, and channel configuration utilities.
Q: What warranty does Konmask.com provide?
A: All units carry a 90-day Konmask functional warranty. Extended warranty and on-site swap programmes are available — contact support for details.
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