The NI PCI-6255 is a 16-bit multifunction DAQ module engineered for precision data acquisition, analysis, and control across laboratory automation, research, design verification, and manufacturing test environments. This PCI-bus device delivers 80 single-ended or 40 differential analog input channels alongside 2 analog outputs, 24 digital I/O lines, and dual 32-bit counters/timers. The module integrates analog and digital triggering, supports signal conditioning expansion, and connects via dual 68-pin VHDCI connectors.
Technical Specifications
Analog Inputs
• 80 single-ended or 40 differential channels
• 16-bit resolution
• Single-channel: 1.25 MS/s; multichannel: 750 kS/s maximum sample rate
• Input ranges: ±0.1 V to ±10 V
• CMRR: 100 dB
• Bias current: ±100 pA
• Crosstalk: -67 dB (64-channel separation)
Analog Outputs
• 2 channels, 16-bit resolution
• Maximum update rate: 2.86 MS/s
• Output ranges: ±5 V, ±10 V
• Output impedance: 0.2 Ω
• DC-coupled
Digital I/O
• 24 TTL/CMOS lines
• ±20 V protection
• 24 mA drive capability for relay and actuator control
Counters/Timers
• 2 × 32-bit counters
• 80 MHz base frequency
• Quadrature encoder and PWM modes (mutually exclusive per counter)
– Key Features
• Dual analog triggering and digital triggering modes
• Supports signal conditioning modules for expanded sensor measurement
• DC-coupled analog output for direct control signals
• High CMRR performance minimizes noise in differential measurements
• Low bias current design for high-impedance sensor compatibility
– Typical Applications
Laboratory automation, sensor-based research, design verification testing, manufacturing quality control, and closed-loop system development requiring high-resolution simultaneous analog input/output control.
– Compatibility & Integration
PCI-bus architecture. Operating temperature: 0 °C to 55 °C. Power: +5 V @ 0.03 A, +3.3 V @ 0.725 A, +12 V @ 0.35 A.
