The National Instruments SCXI-1102B is a 32-channel isolated analog input module for SCXI chassis systems. It conditions and digitizes low-level signals from thermocouples, voltage, millivolt, and current sources with selectable gain and integrated cold-junction compensation. The module multiplexes all channels to a single output, driving standard NI DAQ devices for high-speed data acquisition in industrial test and measurement applications.
Technical Specifications
• Analog Input Channels: 32 differential channels
• Input Signal Ranges: ±10 V (gain = 1), ±0.1 V (gain = 100), ±100 mV (gain = 100)
• Common-Mode Input Range: ±10 V
• Sampling Rate: Up to 333 kS/s (3 µs per channel)
• Filter: Three-pole low-pass, 200 Hz cutoff frequency
• Input Coupling: DC
• Input Protection: ±42 VAC peak or ±60 VDC maximum
• Cold-Junction Compensation: Integrated sensor
– Key Features
• Multiplexed architecture routes all 32 channels through a single output to one DAQ device channel, reducing cabling and system complexity
• Robust input protection withstands transients up to ±42 VAC peak or ±60 VDC without damage
• Three-pole low-pass filter at 200 Hz suppresses high-frequency noise and aliasing in low-bandwidth sensor applications
• Integrated cold-junction compensation enables direct thermocouple measurement without external reference hardware
• Programmable gain (1× or 100×) adapts input range to signal magnitude
– Typical Applications
• Distributed thermocouple monitoring in thermal testing and process control
• Multi-channel voltage and current acquisition for power supply characterization
• Low-frequency sensor data logging in industrial field applications
• Test systems requiring isolated measurement channels with galvanic separation
– Compatibility & Integration
The SCXI-1102B requires a National Instruments SCXI chassis and one of the following DAQ controllers: NI X Series, M Series, E Series, or S Series modules. Compatible terminal blocks include SCXI-1303 and TC-2095. Operation requires NI-DAQmx driver software version 7.0 or later and integrates with LabVIEW, LabWindows/CVI, and Measurement Studio development environments. Module dimensions are 1.2 × 6.8 × 8.0 inches; weight is 24.6 oz. Operating temperature range is 0 to 50 °C.
