The NI SCXI-1102B is a 32-channel thermocouple amplifier module that delivers signal conditioning and data acquisition within the SCXI platform. It provides programmable gain amplification, precision filtering, and cold-junction compensation to enable accurate temperature measurements across industrial and laboratory environments. The module multiplexes 32 differential analog input channels into a single output, expanding the channel count of compatible National Instruments DAQ devices.
Technical Specifications
• Input Channels: 32 differential analog inputs
• Amplifier: Programmable gain instrumentation amplifier (1× or 100× selectable)
• Differential Input Range: ±10 V (gain 1×); ±0.1 V (gain 100×)
• Common-Mode Input Range: ±10 V
• Filter: Three-pole low-pass, 200 Hz cutoff frequency
• Input Protection: ±42 VAC peak or 60 VDC maximum
• Channel-to-Bus Isolation: 300 Vrms
• Input Coupling: DC
• Cold-Junction Compensation: Built-in sensor channel
• Calibration: EEPROM supports 2-point calibrations via NI-DAQmx driver
• Front Connector: 96-pin male DIN C
• Rear Connector: 50-pin male ribbon cable
• Dimensions: 1.2 × 6.8 × 8.0 inches
• Weight: 24.6 oz
– Key Features
• Supports J, K, T, E, R, S, B, and N thermocouples
• Accommodates low-bandwidth volt/millivolt sources and 4–20 mA / 0–20 mA process-current sources
• Compatible with SCXI-1581 precision current source module for RTD and thermistor measurement
• Three-pole filter with 200 Hz cutoff attenuates 60 Hz noise
• Robust input overvoltage protection
– Typical Applications
• Multi-point temperature monitoring in industrial test systems
• Laboratory data acquisition with thermocouple sensor arrays
• Process control and monitoring requiring high channel density
– Compatibility & Integration
The module integrates with SCXI chassis and connects to National Instruments DAQ devices via multiplexed output. Compatible terminal blocks include SCXI-1300, SCXI-1303, SCXI-1308, SCXI-1309, SCXI-1310, TC-2095, TBX-1303, and TBX-96.
