NI-9211 and sbRIO-9211 Specifications

Terminology & Naming Conventions

In these specifications, the NI-9211 and sbRIO-9211 are referred to inclusively as the NI-9211.

Definitions

Warranted specifications describe the performance of a model under stated operating conditions and are covered by the model warranty.

Characteristics describe values that are relevant to the use of the model under stated operating conditions but are not covered by the model warranty.

  • Typical specifications describe the performance met by a majority of models.
  • Nominal specifications describe an attribute that is based on design, conformance testing, or supplemental testing.

Specifications are Typical unless otherwise noted.

Conditions

Specifications are valid for the range -40 °C to 70 °C unless otherwise noted.

Accuracy within typical use can vary based on chassis, mounting parameters, other modules present in the system, and installed accessories.

NI-9211 Pinout



Table 1. Signal Descriptions
Signal Description
COM Common reference connection to isolated ground
NC No connection
TC+ Positive thermocouple connection
TC- Negative thermocouple connection

Input Characteristics

Number of channels

4 thermocouple channels, 1 internal autozero channel, 1 internal cold-junction compensation channel

ADC 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

Overvoltage protection

±30 V between any input and COM

Differential input impedance

20 MΩ

Input current

50 nA

Input noise

1 μV RMS

Gain error (at -40 °C to 70 °C)

0.06% typical, 0.1% maximum

Offset error (with autozero channel on)

±15 μV typical, ±20 μV maximum

Gain error from source impedance

Add 0.05 ppm per Ω when source impedance >50 Ω

Offset error from source impedance

Add ±0.05 μV typical, ±0.07 μV maximum per Ω when source impedance >50 Ω

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

MTBF

633,012 hours at 25 °C; Bellcore Issue 2, Method 1, Case 3, Limited Part Stress Method

Temperature Measurement Accuracy

Measurement sensitivity[1]1 Measurement sensitivity represents the smallest change in temperature that a sensor can detect. It is a function of noise. The values assume the full measurement range of the standard thermocouple sensor according to ASTM E230-87.
With autozero channel on

Types J, K, T, E, N

<0.07 °C

Type B

<0.25 °C

Types R, S

<0.60 °C

With autozero channel off

Types J, K, T, E, N

<0.05 °C

Type B

<0.20 °C

Types R, S

<0.45 °C

The following figures show the typical and maximum errors for each thermocouple type when used with the NI-9211 over the full temperature range and autozero on. The figures account for gain errors, offset errors, differential and integral nonlinearity, quantization errors, noise errors, and isothermal errors. The figures do not account for the accuracy of the thermocouple itself.

Figure 1. Thermocouple Type J and N Errors


Figure 1. Thermocouple Type K Errors


Figure 1. Thermocouple Type T and E Errors


Figure 1. Thermocouple Type B Errors


Figure 1. Thermocouple Type R and S Errors


Safety Voltages

Connect only voltages that are within the following limits.

Channel-to-COM

±30 V maximum

Isolation

Channel-to-channel

None

Channel-to-earth ground

Continuous

250 V RMS, Measurement Category II

Withstand

2,300 V RMS, verified by a 5 s dielectric withstand test

Measurement Category II

Caution Do not connect the product to signals or use for measurements within Measurement Categories III or IV.
Attention Ne pas connecter le produit à des signaux dans les catégories de mesure III ou IV et ne pas l'utiliser pour effectuer des mesures dans ces catégories.

Measurement Category II is for measurements performed on circuits directly connected to the electrical distribution system. This category refers to local-level electrical distribution, such as that provided by a standard wall outlet, for example, 115 V for U.S. or 230 V for Europe.

Environmental Characteristics

Temperature

Operating

-40 °C to 70 °C

Storage

-40 °C to 85 °C

Humidity

Operating

10% RH to 90% RH, noncondensing

Storage

5% RH to 95% RH, noncondensing

Ingress protection

IP40

Pollution Degree

2

Maximum altitude

2,000 m

Shock and Vibration
Operating vibration

Random

5 g RMS, 10 Hz to 500 Hz

Sinusoidal

5 g, 10 Hz to 500 Hz

Operating shock

30 g, 11 ms half sine; 50 g, 3 ms half sine; 18 shocks at 6 orientations

To meet these shock and vibration specifications, you must panel mount the system.

Power Requirements

Power consumption from chassis

Active mode

170 mW maximum

Sleep mode

4 mW maximum

Thermal dissipation (at 70 °C)

Active mode

170 mW maximum

Sleep mode

4 mW maximum

Physical Characteristics

Screw-terminal wiring

Gauge

0.25 mm2 to 2.5 mm2 (24 AWG to 12 AWG) copper conductor wire

Wire strip length

7 mm (0.28 in.) of insulation stripped from the end

Temperature rating

90 °C, minimum

Torque for screw terminals

0.3 N · m (2.66 lb · in.)

Wires per screw terminal

One wire per screw terminal

Connector securement

Securement type

Screw flanges provided

Torque for screw flanges

0.2 N · m (1.80 lb · in.)

Dimensions

Visit ni.com/dimensions and search by module number.

Weight

150 g (5.3 oz)

Calibration

You can obtain the calibration certificate and information about calibration services for the NI-9211 at ni.com/calibration.

Calibration interval

1 year

1 Measurement sensitivity represents the smallest change in temperature that a sensor can detect. It is a function of noise. The values assume the full measurement range of the standard thermocouple sensor according to ASTM E230-87.