NI AT-MIO-16L-9 Multifunction I/O Board

The NI AT-MIO-16L-9 is a multifunction I/O board for data acquisition and control applications in laboratory automation, industrial control, and data logging. It integrates 16 configurable analog inputs (8 differential), 2 analog outputs, 8 digital TTL I/O lines, and 3 counter/timer channels on a single ISA-based card. The board delivers 12-bit resolution across all analog functions with sampling rates up to 100 kS/sec and conversion times of 9 microseconds per channel. Dual-channel DMA and 256-word FIFOs enable sustained high-speed data transfer without loss of samples, even under high interrupt latency conditions.

– Technical Specifications

Analog Inputs
• 16 configurable channels (8 differential)
• 12-bit ADC resolution
• Sampling rate: up to 100 kS/sec
• Conversion time: 9 microseconds
• Programmable gain: 1, 10, 100, and 500
• Noise: 0.1 LSBrms typical
• DNL: ±0.5 LSB typical
• 256-word buffer with auto-calibration

Analog Outputs
• 2 × 12-bit DACs with voltage output
• Buffered digital-to-analog conversion

Digital I/O
• 8 TTL-compatible lines
• 5 V TTL logic levels

Counter/Timers
• 3 × 16-bit channels for timing and counting operations

– Key Features

• High-accuracy measurements with low noise and excellent differential nonlinearity
• Dual-channel DMA and FIFO architecture for continuous acquisition
• Real-Time System Integration (RTSI) bus for multi-function synchronization
• 50-pin multi-signal connector
• PC/AT form factor with ISA interface

– Typical Applications

Laboratory data acquisition, industrial process monitoring, SCXI signal conditioning integration (up to 3,000 analog channels via thermocouple, RTD, voltage, current, and strain gauge inputs), and synchronized multi-board measurement systems.

– Compatibility & Integration

The AT-MIO-16L-9 operates with NI-DAQ and NI-DAQmx driver software, supports LabVIEW and LabWindows programming environments, and integrates with SCXI systems via the RTSI bus for signal conditioning and channel expansion.