The NI Lab-PC-1200 is an ISA bus multifunction I/O board for data acquisition and control in laboratory, production, and industrial monitoring applications. It integrates 12-bit analog input with programmable gain, 12-bit analog output, 24 lines of digital I/O, and three 16-bit counter/timers on a single card for PC AT systems.
Technical Specifications
Analog Input
• 8 single-ended or 4 differential channels
• 12-bit successive-approximation ADC
• Up to 100 kS/s single-channel sampling; 83.3 kS/s multichannel at gain 1
• Software-programmable ranges: 0–10 V unipolar, ±5 V, ±10 V, ±2.5 V, ±1.25 V, ±0.625 V bipolar
• Programmable Gain Amplifier: 1, 2, 5, 10, 20, 50, 100×
• Input impedance: 100 MΩ differential / 50 MΩ single-ended (4.7 kΩ minimum when powered off)
• Noise: 4.8 μVrms typical at ±10 V; 72 dB SNR
• Overvoltage protection: ±35 V powered on, ±25 V powered off
• Self-calibration for gain and offset errors
• Single-channel continuous, multichannel continuous scanning, or interval scanning modes (1 μs resolution)
Analog Output
• 2 independent channels
• 12-bit DAC
• Software-configurable 0–10 V unipolar or ±5 V bipolar
• ±5 mA maximum output current per channel
• 10 μs settling time to ±0.1% full scale
• Waveform generation via programmed I/O or interrupts with counter/timer support
Digital I/O
• 24 lines configurable as three 8-bit ports
• 5 V TTL compatible
• Input, output, bidirectional, and handshaking modes
• 2.5 mA sink capability per line
Counter/Timers
• Three 16-bit counters
• 2 MHz base clock, 8 MHz maximum source frequency
• Clock output, pulse output, and event functions
– Key Features
• Single-card integration eliminates multi-board system complexity
• Programmable gain amplifier reduces external signal conditioning requirements
• Multichannel scanning with microsecond timing resolution for synchronized measurements
• Input impedance scaling supports both high-impedance and low-impedance signal sources
– Typical Applications
Laboratory test automation, production line data logging, process control monitoring, and instrumentation systems requiring mixed analog/digital signal handling.
– Compatibility & Integration
ISA bus architecture for PC AT series computers. Maximum sustainable data transfer rate to standard PC parallel port: 25 kS/s.
