NI PCI-6251

Description

Technical Specifications:

• Analog Input: 16 single-ended / 8 differential channels, 16-bit resolution, 1.25 MS/s maximum sampling rate
• Input Ranges: ±0.1 V, ±0.2 V, ±0.5 V, ±1 V, ±2 V, ±5 V, ±10 V (7 programmable ranges)
• Analog Output: 2 channels, 16-bit resolution
• Digital I/O: 24 TTL/CMOS compatible lines
• Counters/Timers: 2× 32-bit, 80 MHz counter/timers
• Timing Resolution: 50 ns
• Small Signal Bandwidth: 1.7 MHz
• CMRR (DC to 60 Hz): 100 dB
• Input FIFO Size: 4095 samples
• Data Transfer: DMA (scatter-gather), interrupts, programmed I/O
• Bus Interface: 32-bit PCI bus Functional Features:
• NI-MCal calibration technology for improved measurement accuracy
• 2-year calibration interval
• Analog and digital triggering capabilities
• Overvoltage protection on analog inputs
• Supported by NI-DAQmx driver software Application Scenarios:
• High-speed data acquisition
• Dynamic signal testing
• Control system validation
• Automotive testing
• Audio and vibration measurement Material Composition:
• High-precision analog front-end components
• Shielded PCB design for noise reduction Structural Features:
• Standard PCI form factor
• Integrated signal conditioning circuitry Working Principle: The device uses high-speed ADCs to convert analog input signals to digital data at up to 1.25 MS/s with 16-bit resolution. It performs onboard signal conditioning and data buffering, then transfers data to the host system via DMA for processing and analysis. Installation Requirements:
• Installs in standard 32-bit PCI slot
• Requires adequate system power
• Use shielded cabling for all analog connections Usage Notes:
• Operate within specified environmental ranges
• Avoid sources of electromagnetic interference
• Calibrate every 2 years to maintain specified accuracy