The Measurement Computing CIO-EXP16 is a 16-channel differential analog multiplexer board that expands the input capacity of DAS08 and DAS16 series data acquisition boards. It multiplexes 16 differential inputs into a single-ended output routable to one A/D channel, enabling 8-channel boards to scale to 128 inputs and 16-channel boards to 256 inputs through multiple unit cascading. On-board signal amplifiers with user-selectable gains and integrated cold junction compensation circuitry enable direct thermocouple measurement across J, K, T, E, S, R, and B type thermocouple standards.
Technical Specifications
• Input Configuration: 16 fully differential inputs multiplexed to single-ended output
• Gains: 1, 10, 100, 200, 500 (user-selectable)
• Input Protection: ±35 V continuous
• Common Mode Voltage: ±10 V maximum
• Analog Output Voltage: ±10 V maximum
• Common Mode Rejection Ratio: >90 dB across all ranges
• Accuracy: 0.01% of reading ±1 bit
• CJC Output: +24.4 mV/°C (0 V @ 0°C)
• Power Consumption: +5 V @ 26 mA; ±V @ 25 mA
• Dimensions: 229 mm L × 102 mm W (9 × 4 inches)
– Key Features
• Four digital inputs controlled by host A/D board outputs for channel selection
• Thermocouple support with on-board semiconductor CJC reference
• Open thermocouple detection: −50 mV at positive input (selectable via solder bridge)
• 100 kΩ input ground reference (selectable via solder bridge)
• Expandability: Up to 8 boards with CIO-DAS08; up to 16 boards with CIO-DAS16
– Compatibility & Integration
Connects via two 37-pin D-type connectors (P1, P2) wired 1:1. Board-to-A/D connectivity requires application-specific cables (C37FF-x for DAS08 series; C-MUXAD16-10 for CIO-DAS 1400/1600/16). Daisy-chaining of CIO-EXP16 boards is supported using C37FF-x cables.
