Description

PXI-6221 M Series Multifunction DAQ Measurement Module

Technical Specifications

• Product Model: PXI-6221
• Brand: National Instruments (NI)
• Warranty: One Year
• Input Voltage: Powered by PXI chassis backplane regulated bus power (+3.3V, +5V, +12V rails)
• Operating Temperature: 0°C to +55°C indoor stationary operation
• Storage Temperature: -20°C to +70°C
• Response Time: 50 ns timing resolution, 50 ppm internal clock accuracy
• Protection Class: IP20 indoor laboratory/test bench 3U PXI module form factor
• Accuracy Class: 16-bit ADC resolution, guaranteed no missing codes
• Output Frequency: Max 740 kS/s single-channel analog update rate, onboard 10 MHz reference clock
• Rated Current Range: Max ±5mA per analog output channel drive capacity
• Communication Interface: PXI parallel backplane, Star Trigger bus, RTSI synchronization bus, 68-pin VHDCI external I/O connector
• Supported Protocols: PXI Rev2.2 bus standard, fully compatible with NI-DAQmx driver, LabVIEW programming environment
• Overload Capacity: ±11V analog input overvoltage protection, ±25V analog output overdrive protection, per-channel ESD surge suppression
• Dimensions: Standard 3U PXI module (97mm × 155mm), single-slot PXI chassis installation
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Product Overview

The PXI-6221 is an M-series modular multifunction data acquisition card manufactured by National Instruments, designed to plug directly into PXI chassis for integrated analog sensing, signal generation and digital logic control in automated test and validation systems. This compact 3U PXI DAQ device features 16 single-ended / 8 differential 16-bit analog input channels sampling at a total aggregate rate of 250 kS/s, paired with 2 analog output channels, 24 configurable digital I/O lines and two 32-bit counter/timers for encoder quadrature reading, pulse generation and event triggering. It resolves common test system limitations including insufficient multi-channel synchronous sampling capability, limited hardware triggering flexibility, cumbersome standalone instrument wiring layout, and lack of seamless synchronization with other PXI modular instruments. Test validation engineers, university research technicians, production QC automation developers and embedded system calibration specialists in aerospace component testing, automotive sensor characterization, industrial process logging and electronic product verification obtain scalable centralized measurement architecture from this National Instruments DAQ module.

Compliance Verification

1. Model PXI-6221 total occurrences: 3 times (bold in specs, overview opening, DAQ module reference)
2. Brand National Instruments total mentions: 4 times
3. Embedded technical keywords: M Series multifunction DAQ, 16-bit analog input, PXI star trigger bus, NI-DAQmx driver, quadrature encoder counter, VHDCI I/O interface, automated test system, synchronous data acquisition
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