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National Instruments · SCXI

SCXI-1328

The National Instruments SCXI-1328 is an isothermal terminal block for precision thermocouple measurements. It incorporates a high-accuracy cold-junction temperature sensor.

ManufacturerNational Instruments

ModelSCXI-1328

Part Number777687-28 · 776573-28

Product TypeIsothermal thermocouple terminal block

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ConstructionIsothermal terminal block

CJC sensorBuilt-in thermistor

Supported modulesSCXI-1120, SCXI-1120D, SCXI-1121 and SCXI-1125

Field wiring26–14 AWG

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Overview

Product overview

Key product information and technical features.

The SCXI-1328 connects field transducers to supported SCXI modules through screw terminals. NI describes its construction as a shielded board with supports that mate to the module input connector.

Its onboard thermistor measures the cold-junction temperature used in thermocouple compensation. NI documents access to this sensor through the connected SCXI module; the addressing method depends on the module and acquisition configuration.

Isothermal construction for precision thermocouple applications.
High-accuracy onboard temperature sensor.
Screw terminals for field-signal connections.
Thermistor-based cold-junction compensation.

Verified specifications

Technical data

Verified product specifications.

Terminal-block construction	Isothermal
Cold-junction sensor type	Thermistor
Field wire gauge	26–14 AWG
Cold-junction sensor output	1.91 V at 0 °C to 0.58 V at 55 °C

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National Instruments

Manufacturer

SCXI

Signal-conditioning platform

SCXI-1328

Isothermal terminal block

Signal connection

Screw terminals connect transducers to the module inputs.

Check the selected module's wiring instructions and CJC configuration before connecting thermocouples.

Manuals & software

Technical resources

Manuals, software and technical resources for this model.

SCXI Terminal Blocks — Selection Guide and SpecificationsManufacturer Datasheet · search.ni.com

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SCXI-1121 User Manual — Includes SCXI-1328 Connection InformationModule User Manual · download.ni.com

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How to Use Cold Junction Compensation (CJC) with SCXI ModulesTechnical resource

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FAQ

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Product-specific answers based on available technical information.

Which modules support the SCXI-1328?

NI lists the SCXI-1120, SCXI-1120D, SCXI-1121 and SCXI-1125 for its precision thermocouple applications.

Does the SCXI-1328 include a cold-junction sensor?

Yes. It uses a built-in thermistor for cold-junction compensation.

How is the cold-junction temperature read?

The sensor is accessed through the connected SCXI module. NI's CJC guidance explains the channel addressing and configuration differences between modules and acquisition modes.