National Instruments NI-9214 C Series thermocouple temperature input module

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National Instruments · CompactDAQ and CompactRIO

NI-9214

The NI-9214 is a 16-channel thermocouple input module for CompactDAQ and CompactRIO systems. It uses the TB-9214 isothermal terminal block for sensor connections and cold-junction compensation.

ManufacturerNational Instruments

ModelNI-9214

Part Number781510-01

Product TypeC Series thermocouple temperature input module

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Thermocouple channels16

ADC resolution24 bits

High-speed acquisition68 S/s aggregate

Input range±78.125 mV

Signal connectionsTB-9214 screw terminals

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Overview

Product overview

Key product information and technical features.

Designed for higher-channel-count temperature measurement systems, the NI-9214 incorporates terminal-block CJC sensors, a layout that minimizes thermal gradients, and an autozero channel for offset compensation.

Isothermal TB-9214 terminal block with cold-junction compensation sensors.
Internal autozero channel for offset-error compensation.
High-resolution and high-speed timing modes.
Open-thermocouple detection circuitry.

Verified specifications

Technical data

Verified product specifications.

Thermocouple input channels	16 channels
ADC resolution	24 bits
ADC type	Delta-sigma
Sampling mode	Scanned
Voltage measurement range	±78.125 mV
High-speed sample rate, all channels	68; includes autozero and CJC channels in the scan S/s aggregate
High-resolution sample rate, all channels	0.96; includes autozero and CJC channels in the scan S/s
Supported thermocouple types	J, K, T, E, N, B, R, S
Channel-to-earth isolation, continuous	250; Measurement Category II Vrms
Channel-to-channel isolation	None
Operating temperature	-40 to 70 °C
Conformal coating	No
Enclosed	Yes

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Compatibility

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National Instruments

Manufacturer

CompactDAQ / CompactRIO

System platforms

NI-9214

C Series temperature input module

TB-9214

Dedicated signal-connection terminal block

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Manuals & software

Technical resources

Manuals, software and technical resources for this model.

NI-9214 Product PageProduct Page · ni.com

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NI 9214 and TB-9214 DatasheetDatasheet · download.ni.com

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NI 9214 Getting Started GuideGetting Started Guide · download.ni.com

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NI-9213 versus NI-9214 Thermocouple Module ComparisonTechnical resource

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Calculating NI-9214 Accuracy in VoltsTechnical resource

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FAQ

Product-specific questions

Product-specific answers based on available technical information.

Is 68 S/s a per-channel sample rate?

No. NI identifies 68 S/s as an aggregate rate, not 68 S/s per thermocouple channel.

Which terminal block does the NI-9214 use?

It uses the TB-9214, which NI identifies as exclusively compatible with the NI-9214. Confirm the terminal block supplied with the individual catalog item.

Does 0.37 °C describe accuracy under all conditions?

No. For example, the datasheet gives 0.37 °C typical error for a type K thermocouple at 100 °C in high-resolution mode at 23 °C ±5 °C ambient. The table assumes autozero enabled, open-thermocouple detection disabled and zero common-mode voltage, and excludes thermocouple error.

How does the NI-9214 differ from the NI-9213?

NI describes the NI-9214's added terminal block as providing additional cold-junction compensation and increased measurement accuracy. Compare the model-specific accuracy specifications rather than treating the modules as interchangeable.