The National Instruments SCXI-1102 is a 32-channel differential analog input module for signal conditioning within SCXI chassis systems. It acquires thermocouple, millivolt, volt, and current signals with selectable gain (1 or 100) and programmable input ranges up to ±10 V. Three filter variants provide cutoff frequencies from 2 Hz to 10 kHz, with built-in cold-junction compensation for thermocouple measurements. The module delivers 12- to 16-bit resolution at up to 333 kS/s and achieves >100 dB CMRR at 50/60 Hz, making it suitable for precision measurement in noisy industrial and laboratory environments.
– Technical Specifications
• Channels: 32 differential analog inputs + 1 cold-junction sensor channel
• Signal Types: Thermocouples, millivolt sources, volt sources, 4–20 mA and 0–20 mA current sources, RTDs and thermistors (with SCXI-1581)
• Input Ranges: ±80 mV (typical), ±100 mV (programmable), ±10 V (programmable)
• Gain: Selectable 1 or 100 per channel
• Input Impedance: 10 GΩ minimum
• CMRR: >100 dB at 50/60 Hz
• Overvoltage Protection: ±42 V
• Sampling Rate: 333 kS/s maximum
• Resolution: 12-bit to 16-bit (dependent on DAQ device)
• Power: +5 V DC at 200 mA; ±15 V at 150 mA maximum (SCXI-1102C)
• Dimensions: 274 mm × 170 mm × 25 mm
• Weight: 24.6 oz
• Warm-up Time: 20 minutes suggested
– Key Features
• Three filter variants: 2 Hz (SCXI-1102), 200 Hz (SCXI-1102B), or 10 kHz (SCXI-1102C) cutoff
• Built-in cold-junction compensation for thermocouple modules (SCXI-1303 or SCXI-1300 compatible)
• All 32 channels multiplexed into single DAQ device channel
• High input impedance and exceptional noise rejection for low-level signal acquisition
– Typical Applications
• Multi-channel thermocouple temperature monitoring
• Process current and RTD measurement systems
• Industrial data acquisition in electrically noisy environments
• Laboratory signal conditioning for low-voltage sensors
– Compatibility & Integration
The SCXI-1102 operates within SCXI chassis or PXI/SCXI combination chassis and integrates with E/M Series DAQ devices or SCXI-1600. Compatible with NI-DAQmx and LabVIEW; requires NI-DAQ 7.0 or later.
