Part Code Definition

SCXI = SCXI signal conditioning platform

1102B = revised version of SCXI-1102, fixed filter at 200Hz cutoff frequency, upgraded input protection circuit vs early SCXI-1102(2Hz filter option).

Technical Specifications

Input channel：32 fully differential input, DC-coupled

Full-scale range：±10V(Gain×1) / ±100mV(Gain×100); programmable gain ×1/×2/×5/×10/×20/×50/×100 software selectable

Per-channel filter：fixed 3rd-order low-pass filter, 200Hz cutoff frequency

Max sampling rate：333kS/s full-chassis total scan speed

Input impedance：1MΩ//12pF differential input; CMRR＞110dB@50Hz

Overvoltage protection：each channel withstand ±42VAC peak /60VDC max transient input protection

Operation environment：0℃~+50℃ working, -40℃~+70℃ storage, RH5%~95% non-condensing

Dimension：standard SCXI module 173×86×203mm, net weight≈1.38kg

Certification：CE, UL, C/US certified

Interface & Communication Configuration

Front terminal：96-pin DIN connector, match SCXI-1302/SCXI-1303 screw terminal blocks for field sensor wiring; terminal embedded CJC temperature sensor for thermocouple cold end compensationNI

Rear port：SCXI standard backplane golden finger, plug into SCXI-1000/SCXI-1001 chassis slot, transmit multiplexed analog signal via chassis internal bus to PCI/PCIe DAQ card

Bus mode：32 channels time-division multiplex onto single SCXI analog bus to DAQ input channel

Core Functions

Multiplex 32 independent differential sensor signals into single programmable instrumentation amplifier circuit for DAQ channel expansion

Software adjustable PGA amplifies weak thermocouple mV signal and standard voltage/current signal uniformly

Fixed per-channel 200Hz low-pass filtering eliminates industrial power frequency and high-frequency noise interference

Onboard CJC cold-junction compensation realizes direct thermocouple temperature acquisition without extra compensation module

Complete overvoltage safeguard prevents field wiring surge from damaging module inner circuit

Application Scenarios

Automotive bench multi-point temperature & strain testing, aerospace environmental chamber multi-sensor centralized acquisition, petrochemical field process analog signal collection, lab thermal cycling test system, old SCXI DAQ system spare replacement.

Operation & Maintenance Notes

Power off SCXI chassis before plug/unplug module to avoid backplane burnout; separate weak signal twisted pair and high-power AC cable to reduce EMI interference; set gain parameter matching sensor output range in LabVIEW/NI-DAQmx before commissioning; regularly fasten terminal block screws to prevent contact drift; CJC sensor wiring strictly follow terminal definition to guarantee accurate thermocouple reading.