NI PCI-6221

Description

Technical Specifications:

• Analog Input: 16 single-ended / 8 differential channels, 16-bit resolution, 250 kS/s maximum sampling rate
• Input Ranges: ±0.2 V, ±1 V, ±5 V, ±10 V
• Analog Output: 2 channels, 16-bit resolution
• Digital I/O: 24 TTL/CMOS compatible lines
• Counters/Timers: 2× 32-bit counter/timers
• Timing Resolution: 50 ns
• Small Signal Bandwidth: 700 kHz
• Input FIFO Size: 4095 samples
• Bus Interface: 32-bit PCI bus
• I/O Connector: 68-pin male SCSI-II type connector Functional Features:
• No missing codes guaranteed for analog input
• Correlated digital I/O synchronized with analog operations
• Digital triggering capability for precise measurement synchronization
• Compatible with SCC and SCXI signal conditioning modules
• Supported by NI-DAQmx driver and configuration utilities Application Scenarios:
• Laboratory automation
• Research and development testing
• Design verification
• Manufacturing quality control
• General-purpose data acquisition and control Material Composition:
• High-density FR-4 circuit board
• Shielded I/O interface Structural Features:
• Standard PCI form factor
• Compact single-board design Working Principle: The device performs analog-to-digital conversion on input signals with 16-bit precision, processes digital I/O operations synchronized with analog sampling, and handles pulse counting and timing functions. All operations are managed by the host computer via NI-DAQmx driver software. Installation Requirements:
• Fits standard 32-bit PCI expansion slot
• Bus-powered operation from PCI slot
• Use shielded cables for analog signal connections Usage Notes:
• This product is no longer in active production; recommended replacement is PCIe-6321
• Follow ESD protection guidelines during handling
• Perform periodic calibration to ensure measurement accuracy