The Measurement Computing CIO-DAS08 is a multifunction analog and digital I/O board that delivers integrated data acquisition for Windows-based systems via ISA bus interface. It combines 12-bit analog input, programmable digital I/O, and three 16-bit counter channels in a single board, configurable through on-board switches and jumpers for diverse industrial and laboratory measurement tasks.
Technical Specifications
Analog Input
• 8 single-ended channels with AD574 12-bit A/D converter
• Switch-selectable input ranges: ±10 V, ±5 V, 0 to +10 V (CIO-DAS08/JR fixed at ±5 V)
• Polarity: switch-selectable unipolar/bipolar configuration
• Conversion time: 25 µs per sample
• Maximum throughput: 20 kHz (system-dependent)
• Input impedance: 10 MΩ minimum
• Absolute maximum input voltage: ±30 V continuous, ±35 V peak
Digital I/O
• Up to 31 total lines: 24 I/O via auxiliary connector, 3 digital input and 4 digital output on main connector
• Configured as two 8-bit ports and two 4-bit ports
• Programmable by bank as input or output
• Output logic levels: 3.0 V min (high), 0.4 V max (low)
• Input logic thresholds: 2.0 V min (high), 0.8 V max (low)
• Absolute maximum input voltage: 5.5 V to 7 V
Counter/Timer
• Three 16-bit down counter channels using 82C54 counter type
System Configuration
• Base address: selectable 000h to 3F0h via DIP switches
• Interrupt levels: 2 through 7 (jumper-selectable)
• Pacer source: internal PC clock or external clock (jumper-selectable)
Connectors
• Analog: 37-pin male D-type
• Digital: on-board 37-pin connector
Power Consumption
• +5 V: 200 mA typical, 240 mA maximum
• +12 V: 17 mA typical, 22 mA maximum
• -12 V: 28 mA typical, 36 mA maximum
– Key Features
• Software-polled or clock-driven A/D pacing
• Independent polarity and range selection
• Flexible digital port configuration for mixed input/output applications
• Multiple interrupt levels support prioritized data handling
– Typical Applications
Industrial control, laboratory data logging, process monitoring, and real-time sensor acquisition requiring moderate-speed analog sampling with extensive digital I/O capability.
– Compatibility & Integration
Supported under Microsoft Windows operating systems. ISA bus interface. Weight: 0.42 lbs.
