NI 9211 4-Ch ±80 mV, 14 S/s, 24-Bit TC and Diff AI (779001-01)

4-Channel, 14 S/s, ±80 mV C Series Temperature Input Module
The NI‑9211 includes anti-aliasing filters, open-thermocouple detection, and cold-junction compensation for high-accuracy thermocouple measurements. The NI‑9211 features NIST‑traceable calibration and a channel‑to‑earth ground double isolation barrier for safety, noise immunity, and high common-mode voltage range.

Key product

Input Characteristics
Number of channels4 thermocouple channels, 1 internal autozero channel, 1 internal cold-junction compensation channelADC resolution

24 bits

Type of ADC

Delta-Sigma

Sampling mode

Scanned

Voltage measurement range

±80 mV

Temperature measurement ranges

Works over temperature ranges defined by NIST (J, K, T, E, N, B, R, S thermocouple types)

Conversion time

70 ms per channel; 420 ms total for all channels including the autozero and cold-junction channels

Common-mode voltage range
Channel-to-COM

±1.5 V

COM-to-earth ground

±250 V

Common-mode rejection ratio (0 Hz to 60 Hz)
Channel-to-COM

95 dB

COM-to-earth ground

>170 dB

Input bandwidth (-3 dB)

15 Hz

Noise rejection (at 50 Hz and 60 Hz)

85 dB minimum

Cold-junction compensation sensor accuracy
0 °C to 70 °C

±0.6 °C typical, ±1.3 °C maximum

-40 °C to 70 °C

±1.7 °C maximum
Temperature Measurement Accuracy
Measurement sensitivity
With autozero channel on
Types J, K, T, E, N

<0.07 °C

Type B

<0.25 °C

Types R, S

<0.60 °C

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