Product Overview
National Instruments SCXI-1102 Thermocouple Amplifier Module - 32 Differential Channels, 2 Hz Filter, Cold-Junction Compensation
Condition
Single unit available. Used, sourced from a government research facility. Model label on faceplate reads SCXI-1102; Part No. 183087H-01, Rev. 001, Serial No. C41645 confirmed from label. Light surface wear on the brushed aluminum enclosure and faceplate, including a faint curved scratch on the top cover. BNC connector and indicator LED present. Card-edge and multi-pin connectors intact. Visual inspection passed; no damage or missing hardware observed.
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Product Overview
National Instruments SCXI-1102 is a 32-channel thermocouple amplifier module for the SCXI (Signal Conditioning eXtensions for Instrumentation) platform. It accepts signals from thermocouples, millivolt sources, volt sources, and 0-20 mA or 4-20 mA current loops across 32 differential analog input channels, plus one dedicated cold-junction compensation sensor channel. A two-pole lowpass filter with a 2 Hz cutoff rejects 60 Hz line noise - the defining characteristic that separates this variant from the SCXI-1102B (200 Hz) and SCXI-1102C (10 kHz). Selectable per-channel gain of 1 or 100, programmable input ranges of ±100 mV or ±10 V, and ±42 V overvoltage protection. Maximum sampling rate is 333 kS/s across the module. Integrates into an SCXI chassis connected to a compatible NI DAQ device and a host computer running NI-DAQ driver software (version 7.0 or later). Part number 183087H-01 confirmed from label.
Key Features
- 32 differential analog input channels plus one cold-junction sensor channel
- Input compatibility: thermocouples, millivolt, volt, 0-20 mA current, 4-20 mA current; RTD acquisition supported with SCXI-1581 excitation
- 2 Hz two-pole lowpass filter - rejects 60 Hz noise; optimized for slow, stable thermal measurements
- Selectable gain: 1 or 100 per channel
- Programmable input range: ±100 mV or ±10 V per channel
- Maximum sampling rate: 333 kS/s
- Overvoltage protection: ±42 V
- Cold-junction compensation sensor built in for accurate thermocouple readings
- Compatible terminal blocks include SCXI-1300, SCXI-1303, SCXI-1308, SCXI-1310, TC-2095, TBX-1303, TBX-96 - isothermal block SCXI-1303 recommended for precision thermocouple work
- Part No. 183087H-01, Rev. 001, Serial No. C41645 confirmed from label
Applications
- R&D engineer connects multiple thermocouples from prototype hardware to the 32 input channels, configures gain and filtering in LabVIEW, and captures stable thermal data during validation testing - where 2 Hz filtering matters more than bandwidth
- Industrial automation engineer wires thermocouples from ovens, reactors, or process machinery into the module for continuous temperature monitoring, real-time alarm generation, and historical logging across a multi-point process
- Calibration technician swaps in this unit to replace a failed SCXI-1102 in an existing chassis, connects a precision thermocouple simulator to verify channel accuracy, and returns the system to service without re-architecting the rack
- Maintenance engineer expanding an SCXI-based DAQ system slots this module into an open chassis bay to add 32 more thermocouple channels without changing the software stack or cabling architecture
Frequently Asked Questions
What chassis and DAQ hardware does this module require?
The SCXI-1102 requires an SCXI chassis or PXI/SCXI combination chassis, a compatible NI DAQ device (E/M Series DAQ devices and the SCXI-1600 are supported), cabling, and a cable adapter to connect the chassis to the DAQ device. NI-DAQ driver software version 7.0 or later is required on the host computer.
Are there any DAQ devices that limit its functionality?
Yes. When used with a PC-LPM-16 board or DAQCard-700, the module is limited to single-channel reads and cannot scan across channels. Full multi-channel scanning is supported with MIO, Lab-PC+, PCI-1200, DAQCard-1200, and SCXI-1200 devices.
What terminal block should I use for thermocouple measurements?
NI recommends an isothermal terminal block such as the SCXI-1303 for precise thermocouple measurements. Other compatible blocks include SCXI-1300, SCXI-1308, SCXI-1310, TC-2095, TBX-1303, and TBX-96. Terminal block is not included with this module.
How does this variant differ from the SCXI-1102B and SCXI-1102C?
The SCXI-1102 has a two-pole lowpass filter at 2 Hz, designed to reject 60 Hz noise and suited for slow thermal measurements. The SCXI-1102B uses a three-pole filter at 200 Hz, and the SCXI-1102C uses a three-pole filter at 10 kHz for faster signals. All three variants share the same 32-channel architecture, cold-junction compensation, and selectable gain of 1 or 100.
Does this include a terminal block, chassis, or DAQ device?
Not included. This listing is for the SCXI-1102 module only. Chassis, DAQ device, terminal block, and cabling are sold separately.
Thirty-two channels of quiet, patient thermal measurement - a module that spent its working life listening to slow signals no one else was patient enough to hear. Plug it into your chassis and give it something worth measuring.
