NI-9218 Specifications

NI-9218 Specifications

These specifications apply to the NI-9218.

Revision History

Version Date changed Description
378888C-01 November 2024 Added NI-9218 Pinout.
378888B-01 October 2024 Updated amplitude for Total Harmonic Distortion.
378888A-01 June 2023 Initial release.

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Connector Types

The NI-9218 has more than one connector type: NI-9218 with LEMO and NI-9218 with DSUB. Unless the connector type is specified, NI-9218 refers to both connector types.

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.

NI-9218 Pinout



Table 1. Signals by Measurement Type
Mode Pin
1 2 3 4 5 6 7 8 9 10 [1]1 NI-9218 with LEMO only.
±16 V EX+ AI-, EX- AI+
±65 mV EX+ 2 Optional sensor excitation. [2] EX- [2] AI+ AI- [3]3 Tie to pin 3.
Full-Bridge EX+ [2] EX- [2] RS+ RS- AI+ AI- SC SC
IEPE AI+ AI-
TEDS T+ [4]4 TEDS Class 1 data connection. T- T+ [5]5 TEDS Class 2 data connection.
Table 2. Signal Descriptions
Signal Description
AI+ Positive analog input signal connection
AI- Negative analog input signal connection
EX+ Positive sensor excitation connection
EX- Negative sensor excitation connection
RS+ Positive remote sensing connection
RS- Negative remote sensing connection
SC Shunt calibration connection
T+ TEDS data connection
T- TEDS return connection

General Characteristics

Number of channels

2 analog input channels

ADC resolution

24 bits

Type of ADC

Delta-Sigma

Sampling mode

Simultaneous

TEDS support

NI-9218 with DSUB

IEEE 1451.4 TEDS Class 1

NI-9218 with LEMO

IEEE 1451.4 TEDS Class 1 and TEDS Class 2

Internal master timebase (fM)

Frequency

13.1072 MHz

Accuracy

100 ppm

Figure 1. Data Rates
fM÷256n,n=1,2,...,31
Data rate range (fs) using internal master timebase

Minimum

1.652 kS/s

Maximum

51.2 kS/s

Data rate range (fs) using external master timebase

Minimum

1 kS/s

Maximum

51.367 kS/s

Overvoltage protection

Pin 2 to Pin 3

-20 V to 30 V

Any other pin-to-pin

±30 V

Note Be aware when processing acquisitions that include full-scale data. Full-scale data readings indicate that an over-range has occurred in the analog front-end.

±16 V Characteristics

Input coupling

DC

Measurement range

Typical

±16.3 V

Minimum

±16.0 V

Table 12. ±16 V Accuracy
Measurement Conditions Gain Error Offset Error
Calibrated Typical, 23 °C ±5 °C 0.08% 0.70 mV
Maximum, -40 °C to 70 °C 0.20% 9 mV
Uncalibrated[6]6 Uncalibrated accuracy refers to the accuracy achieved when acquiring in raw or unscaled modes where the calibration constants stored in the module are not applied to the data. Typical, 23 °C ±5 °C 1.2% 50 mV
Maximum, -40 °C to 70 °C 2.0% 70 mV

Gain drift

15 ppm/°C

Offset drift

32 μV/°C

Integral non-linearity (INL)

150 μV

Input noise, RMS

51.2 kS/s

128 μV

25.6 kS/s

107 μV

4.27 kS/s

81 μV

Input impedance

390 kΩ

Input bandwidth, -3 dB

0.49 f s

Flatness, DC-20 kHz, referred to 1 kHz

Typical

±30 mdB

Maximum

±50 mdB

Phase non-linearity, DC-20 kHz

0.30°

Input delay

(40 + [5/512])/fs + 5.3 μs

Stopband

Frequency

0.55 fs

Rejection

100 dB

Alias-free bandwidth

0.45 fs

Oversample rate

64 fs

Rejection at oversample rate (fs = 51.2 kS/s)

100 dB

Total Harmonic Distortion (THD), 1 kHz, -3 dBFS

-100 dBc

Spurious-Free Dynamic Range (SFDR), 1 kHz, 1 V RMS

101 dB

Crosstalk

60 Hz, 1 V RMS, common mode

-120 dBFS

1 kHz normal mode, full-scale aggressor

-109 dBFS

CMRR, 60 Hz 1 V RMS-to-earth ground

-120 dBFS

Powered sensor 12 V excitation

Voltage level

12 V ±5%

Voltage noise, RMS 100 kHz bandwidth

1 mV

Output current

Typical

50.5 mA

Minimum

46.5 mA

Settling Time (to 1 % of final value after enabling)

200 ms

±65 mV Characteristics

Input coupling

DC

Measurement range

Typical

73.5 mV

Minimum

72 mV

Table 12. ±65 mV Accuracy
Measurement Conditions Gain Error Offset Error
Calibrated Typical, 23 °C±5 °C 0.13% 8 μV
Maximum, -40 °C to 70 °C 0.20% 130 μV
Uncalibrated[7]7 Uncalibrated accuracy refers to the accuracy achieved when acquiring in raw or unscaled modes where the calibration constants stored in the module are not applied to the data. Typical, 23 °C±5 °C 1.2% 300 μV
Maximum, -40 °C to 70 °C 2.0% 450 μV

Gain drift

10 ppm/°C

Offset drift

320 nV/°C

Input noise, RMS

51.2 kS/s

4.3 μV

25.6 kS/s

3 μV

4.27 kS/s

1.3 μV

Input impedance

>10 MΩ

Input bandwidth, -3 dB

0.49 fs

Flatness, DC-20 kHz, referred to 1 kHz

Typical

-40 mdB to 0 mdB

Maximum

-150 mdB to 20 mdB

Phase non-linearity, DC-20 kHz

0.2°

Input delay

(40 + [5/512])/fs + 3.9 μs

Stopband

Frequency

0.55 fs

Rejection

100 dB

Alias-free bandwidth

0.45 fs

Oversample rate

64 fs

Rejection at oversample rate (fs = 51.2 kS/s)

100 dB

Total Harmonic Distortion (THD), 1 kHz, -1 dBFS

-95 dBc

Spurious-Free Dynamic Range (SFDR), 1 kHz, -1 dBFS

95 dB

Crosstalk

60 Hz, 1 V RMS, common mode

-120 dBFS

1 kHz normal mode, full-scale aggressor

-109 dBFS

CMRR, 60 Hz, 1 V RMS-to-earth ground

-133 dBFS

Powered sensor 12 V excitation

Voltage level

12 V ±5%

Voltage noise, RMS 100 kHz bandwidth

1 mV

Output current

Typical

50.5 mA

Minimum

46.5 mA

Settling Time (to 1% of final value after enabling)

200 ms

Full-Bridge Characteristics

Input coupling

DC

Measurement range

Typical

22.1 mV/V

Minimum

21.7 mV/V

Table 5. Full-Bridge Accuracy
Measurement Conditions Gain Offset
Without Offset Null ≤ 90 days, ±5 °C from Offset Null
Calibrated 3.3 V Excitation Typical, 23 °C ±5 °C 0.10% 2.4 μV/V 0.5 μV/V
Maximum -40 °C to 70 °C 0.20% 40 μV/V 5 μV/V
2 V Excitation Typical, 23 °C ±5 °C 0.10% 30 μV /V 0.8 μV/V
Maximum -40 °C to 70 °C 0.20% 87 μV/V 8 μV/V
Uncalibrated[8]8 Uncalibrated accuracy refers to the accuracy achieved when acquiring in raw or unscaled modes where the calibration constants stored in the module are not applied to the data. 3.3 V Excitation Typical, 23 °C±5 °C 1.2% 100 μV/V
Maximum -40 °C to 70 °C 2.0% 150 μV/V
2 V Excitation Typical, 23 °C±5 °C 1.2% 120 μV/V
Maximum -40 °C to 70 °C 2.0% 200 μV/V

Gain drift

10 ppm/°C

Offset drift

3.3 V excitation

100 nV/V/°C

2 V excitation

160 nV/V/°C

Table 13. Input Noise, RMS
Excitation Voltage Sample Rate
4.27 kS/s 25.6 kS/s 51.2 kS/s
3.3 V 0.4 μV/V 1.0 μV/V 1.3 μV/V
2 V 0.7 μV/V 1.6 μV/V 2.1 μV/V

Differential input impedance

>10 MΩ

Input bandwidth, -3 dB

0.49 fs

Flatness, DC-20 kHz, referred to 1 kHz

Typical

-40 mdB to 0 mdB

Maximum

-150 mdB to 20 mdB

Phase non-linearity, DC-20 kHz

0.2°

Input delay

(40 + [5/512])/fs + 3.9 μs

Stopband

Frequency

0.55 fs

Rejection

100 dB

Alias-free bandwidth

0.45 fs

Oversample rate

64 fs

Rejection at oversample rate (fs = 51.2 kS/s)

100 dB

Total Harmonic Distortion (THD), 1 kHz, -1 dBFS

-95 dBc

Spurious-Free Dynamic Range (SFDR), 1 kHz, -1 dBFS

95 dB

Crosstalk

60 Hz, 1 V RMS, common mode

-120 dBFS

1 kHz, normal mode, full-scale aggressor

-109 dBFS

CMRR, 60 Hz, 1 V RMS-to-earth ground

-133 dBFS

Shunt calibration accuracy

50 kΩ ±0.2%

Strain excitation voltage

2 V level

2 V ±3%

3.3 V level

3.3 V ±3%

Output current

2 V level

17.8 mA

3.3 V level

10.1 mA

IEPE Characteristics

Input coupling

AC

Measurement range

Typical

5.33 V

Minimum

5.0 V

Table 7. IEPE Accuracy
Measurement Conditions Gain Error
Calibrated Typical, 23 °C±5 °C 0.20% (0.017 dB)
Maximum, -40 °C to 70 °C 0.40% (0.034 dB)
Uncalibrated[9]9 Uncalibrated accuracy refers to the accuracy achieved when acquiring in raw or unscaled modes where the calibration constants stored in the module are not applied to the data. Typical, 23 °C±5 °C 1.7% (0.146 dB)
Maximum, -40 °C to 70 °C 2.0% (0.172 dB)

Residual DC offset

<150 mV

Gain drift

25 ppm/°C

Input noise, RMS

51.2 kS/s

50 μV

25.6 kS/s

38 μV

4.27 kS/s

25 μV

Input impedance

300 kΩ

Input bandwidth, -3 dB

0.49 fs

Flatness, 10 Hz-20 kHz, referred to 1 kHz

Typical

±25 mdB

Maximum

±40 mdB

Phase non-linearity, 100 Hz-20 kHz

0.25°

AC cutoff frequency, -3 dB

0.5 Hz

Input delay

(40 + [5/512])/fs + 3.9 μs

Stopband

Frequency

0.55 fs

Rejection

100 dB

Alias-free bandwidth

0.45 fs

Oversample rate

64 fs

Rejection at oversample rate (fs = 51.2 kS/s)

100 dB

Total Harmonic Distortion (THD), 1 kHz, -3 dBFS

-102 dBc

Spurious-Free Dynamic Range (SFDR), 1 kHz, 1 V RMS

107 dB

Intermodulation Distortion (IMD), (CCIF 11 kHz/12 kHz)

-97 dB

Crosstalk

60 Hz, 1 V RMS, common mode

-120 dBFS

1 kHz normal mode, full-scale aggressor

-109 dBFS

CMRR, 60 Hz, 1 V RMS-to-earth ground

-122 dBFS

IEPE excitation current

Typical

2.2 mA

Minimum

2.1 mA

Compliance voltage

Typical

20.5 V

Minimum

19.5 V

If you are using an IEPE sensor, use the following equation to ensure that your configuration meets the IEPE compliance voltage range. This equation must resolve to 0 to 19.5.

Figure 2. IEPE Compliance Voltage Equation
Vbias±Vfull-scale Vbias±Vfull-scale

where

  • Vbias
    is the bias voltage of the IEPE sensor
  • Vfull-scale
    is the full-scale voltage of the IEPE sensor

±20 mA Characteristics

The ±20 mA measurement type requires the NI-9983 measurement-specific adapter. The characteristics are for the NI-9218 used in conjunction with the NI-9983.

Input coupling

DC

Measurement range

Typical

24.4 mA

Minimum

23.0 mA

Table 12. ±20 mA Accuracy
Measurement Conditions Gain Error Offset Error
Calibrated Typical, 23 °C±5 °C 0.40% 5 μA
Maximum, -40 °C to 70 °C 0.60% 42 μA
Uncalibrated[10]10 Uncalibrated accuracy refers to the accuracy achieved when acquiring in raw or unscaled modes where the calibration constants stored in the module are not applied to the data. Typical, 23 °C±5 °C 1.5% 100 μA
Maximum, -40 °C to 70 °C 2.0% 150 μA

Gain drift

35 ppm/°C

Offset drift

105 nA/°C

Shunt resistance

3.01 Ω

Input noise, RMS

51.2 kS/s

1.4 μA

25.6 kS/s

1.0 μA

4.27 kS/s

0.5 μA

Input impedance

45 Ω ±30%

Input bandwidth, -3 dB

0.49 fs

Input delay

(40 + [5/512])/fs + 3.9 μs

Stopband

Frequency

0.55 fs

Rejection

100 dB

Alias-free bandwidth

0.45 fs

Oversample rate

64 fs

Rejection at oversample rate (fs = 51.2 kS/s)

100 dB

Crosstalk

60 Hz, 1 V RMS, common mode

-120 dBFS

1 kHz normal mode, full-scale aggressor

-109 dBFS

CMRR, 60 Hz, 1 V RMS-to-earth ground

-99 dBFS

Powered sensor 12 V excitation

Voltage level

12 V ±5%

Voltage noise, RMS, 100 kHz bandwidth

1 mV

Output current

Typical

50.5 mA

Minimum

46.5 mA

Settling Time (to 1% of final value after enabling)

200 ms

±60 V Characteristics

The ±60 V measurement type requires the NI-9987 measurement-specific adapter. The characteristics are for the NI-9218 used in conjunction with the NI-9987.

Input coupling

DC

Measurement range

Typical

±62.1 V

Minimum

±60 V

Table 12. ±60 V Accuracy
Measurement Conditions Gain Error Offset Error
Calibrated Typical, 23 °C±5 °C 0.3% 3 mV
Maximum, -40 °C to 70 °C 0.6% 40 mV
Uncalibrated[11]11 Uncalibrated accuracy refers to the accuracy achieved when acquiring in raw or unscaled modes where the calibration constants stored in the module are not applied to the data. Typical, 23 °C±5 °C 1.3% 200 mV
Maximum, -40 °C to 70 °C 2.0% 300 mV

Gain drift

30 ppm/°C

Offset drift

120 μV/°C

Integral non-linearity (INL)

15 mV

Input noise, RMS

51.2 kS/s

500 μV

25.6 kS/s

420 μV

4.27 kS/s

320 μV

Input impedance

1.49 MΩ

Input bandwidth, -3 dB

NI-9987D/9987L

Lesser of 2.8 kHz or 0.49 fs

NI-9987F

Lesser of 7 kHz or 0.49 fs

Flatness, DC to 500 Hz, referred to DC, fs ≥ 1.652 kS/s

0.2 dB

Input delay

NI-9987D

(40 + [5/512])/fs + 58.7 μs

NI-9987L

(40 + [5/512])/fs + 57.9 μs

NI-9987F

(40 + [5/512])/fs + 27.2 μs

Stopband

Frequency

0.55 fs

Rejection

100 dB

Alias-free bandwidth

0.45 fs

Oversample rate

64 fs

Rejection at oversample rate (fs = 51.2 kS/s)

100 dB

Total Harmonic Distortion (THD), 8 V RMS, 500 Hz

-80 dBc

Spurious-Free Dynamic Range (SFDR), 8 V RMS, 500 Hz

-80 dB

Crosstalk

60 Hz, 1 V RMS, common mode

-120 dBFS

1 kHz, normal mode, full-scale aggressor

-70 dBFS

CMRR, 60 Hz, 1 V RMS-to-earth ground

-89 dBFS

Half-Bridge Mode Characteristics

The half-bridge measurement type requires the NI-9986 measurement-specific adapter. The characteristics are for the NI-9218 used in conjunction with the NI-9986.

Input coupling

DC

Measurement range

Typical

22.1 mV/V

Minimum

21.7 mV/V

Table 12. Half-Bridge Accuracy
Measurement Conditions Gain Offset
Without Offset Null ≤ 90 days, ±5 °C from Offset Null
Calibrated 3.3 V and 2 V excitation Typical 23 °C±5 °C 0.10% 700 μV/V 45 μV/V
Maximum -40 °C to 70 °C 0.20% 1,000 μV/V 90 μV/V
Uncalibrated[12]12 Uncalibrated accuracy refers to the accuracy achieved when acquiring in raw or unscaled modes where the calibration constants stored in the module are not applied to the data. 3.3 V and 2 V excitation Typical 23 °C±5 °C 1.2% 800 μV/V
Maximum -40 °C to 70 °C 2.0% 1.1 mV/V

Gain drift

10 ppm/°C

Offset drift

1.3 μV/V/°C

Table 13. Input Noise, RMS
Excitation Voltage Sample Rate
4.27 kS/s 25.6 kS/s 51.2 kS/s
3.3 V 0.4 μV/V 1.0 μV/V 1.3 μV/V
2 V 0.7 μV/V 1.6 μV/V 2.2 μV/V

Input bandwidth, -3 dB

0.49 fs

Flatness, DC-20 kHz, referred to 1 kHz

Typical

-40 mdB to 0 mdB

Maximum

-150 mdB to 20 mdB

Phase non-linearity, DC-20 kHz

0.2°

Input delay

(40 + [5/512])/fs + 3.9 μs

Stopband

Frequency

0.55 fs

Rejection

100 dB

Alias-free bandwidth

0.45 fs

Oversample rate

64 fs

Rejection at oversample rate (fs = 51.2 kS/s)

100 dB

Total Harmonic Distortion (THD), 1 kHz, -1 dBFS

-95 dBc

Spurious-Free Dynamic Range (SFDR), 1 kHz, -1 dBFS

95 dB

Crosstalk

60 Hz, 1 V RMS, common mode

-120 dBFS

1 kHz, normal mode, full-scale aggressor

-85 dBFS

CMRR, 60 Hz, 1 V RMS-to-earth ground

-73 dBFS

Strain excitation voltage

2 V level

2 V ±3%

3.3 V level

3.3 V ±3%

Output current

2 V level

17.8 mA

3.3 V level

10.1 mA

Quarter-Bridge Characteristics

The quarter-bridge measurement type requires the NI-9984 or NI-9985 measurement-specific adapter. The characteristics are for the NI-9218 used in conjunction with the NI-9984 or the NI-9985.

Input coupling

DC

Measurement range

Typical

22.1 mV/V

Minimum

21.7 mV/V

Table 12. Quarter-Bridge Accuracy
Measurement Conditions Gain Offset
Without Offset Null ≤ 90 days, ±5 °C from Offset Null
Calibrated 3.3 V and 2 V excitation Typical 23 °C±5 °C 0.10% 700 μV/V 45 μV/V
Maximum -40 °C to 70 °C 0.20% 1,000 μV/V 90 μV/V
Uncalibrated[13]13 Uncalibrated accuracy refers to the accuracy achieved when acquiring in raw or unscaled modes where the calibration constants stored in the module are not applied to the data. 3.3 V and 2 V excitation Typical 23 °C±5 °C 1.2% 800 μV/V
Maximum -40 °C to 70 °C 2.0% 1.1 mV/V

Gain drift

10 ppm/°C

Offset drift

1.3 μV/V/°C

Quarter-bridge completion resistance

NI-9984

120 Ω

NI-9985

350 Ω

Table 13. Input Noise, RMS
Excitation Voltage Sample Rate
4.27 kS/s 25.6 kS/s 51.2 kS/s
350 Ω, 3.3 V 0.4 μV/V 1.0 μV/V 1.3 μV/V
120 Ω, 2 V 0.7 μV/V 1.6 μV/V 2.2 μV/V

Input bandwidth, -3dB

0.49 fs

Flatness, DC-20 kHz, referred to 1 kHz

Typical

-40 mdB to 0 mdB

Maximum

-150 mdB to 20 mdB

Phase non-linearity, DC-20 kHz

0.2°

Input delay

(40 + [5/512])/fs + 3.9 μs

Stopband

Frequency

0.55 fs

Rejection

100 dB

Alias-free bandwidth

0.45 fs

Oversample rate

64 fs

Rejection at oversample rate (fs = 51.2 kS/s)

100 dB

Total Harmonic Distortion (THD), 1 kHz, -1 dBFS

-95 dBc

Spurious-Free Dynamic Range (SFDR), 1 kHz, -1 dBFS

95 dB

Crosstalk

60 Hz, 1 V RMS, common mode

-120 dBFS

1 kHz, normal mode, full-scale aggressor

-85 dBFS

CMRR, 60 Hz, 1 V RMS-to-earth ground

-73 dBFS

Strain excitation voltage

2 V level

2 V ±3%

3.3 V level

3.3 V ±3%

Output current

2 V level

17.8 mA

3.3 V level

10.1 mA

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

5,000 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

Maximum power consumption from chassis

Active mode

900 mW maximum

Sleep mode

500 μW maximum

Maximum thermal dissipation, from -40 °C to 70 °C

Active mode

1.5 W maximum

Sleep mode

550 mW maximum

Vsup Power Requirements

Vsup input voltage range

9 V to 30 V

Maximum power consumption from Vsup

Active mode

2 W maximum

Sleep mode

400 mW maximum

Physical Characteristics

Weight

NI-9218 with DSUB

151 g (5.33 oz)

NI-9218 with LEMO

165 g (5.82 oz)

Dimensions

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

NI-998x Physical Characteristics

Screw-terminal wiring

Gauge

0.05 mm2 (30 AWG) to 1.31 mm2 (16 AWG) copper conductor wire

Wire strip length

6 mm (0.236 in.) of insulation stripped from the end

Temperature rating

80 °C minimum

Wires per screw terminal

One or two wires per screw terminal

Ferrules, single wire

0.25 mm2 (20 AWG) to .52 mm2 (24 AWG)

Torque for screw terminals

0.2 N · m to 0.25 N · m (1.77 lb · in.) to (2.21 lb · in.)

Wire securement

NI-998xD, NI-998xL securement type

Three collets provided (ranging from 2.2 mm to 5.2 mm in diameter)

Torque for collet nut

1.5 N · m (13.3 lb · in.)

NI 998xF securement type

Zip tie provided

NI-998xD and NI-998xF connector securement

Securement type

Jackscrews provided

Jackscrew torque

0.4 N · m (3.6 in · lb)

Weight

NI-998xD, NI-998xL

142 g (5.0 oz) with cable

NI-998xF

34 g (1.2 oz)

NI-9218 Safety Voltages

Caution Any excitation output voltage to earth ground must remain below 60 V DC for each channel. To determine excitation output voltage to earth ground for a channel, add the maximum excitation voltage to the maximum potential on pin 3. The maximum excitation voltages are 2 V +3% and 3.3 V +3% for the bridge excitations, 12 V +5% for the +12 V excitation, and 22 V for the IEPE excitation.
Caution Toute tension d'excitation de sortie par rapport à la terre doit rester inférieure à 60 V CC pour chaque voie. Pour déterminer la tension d'excitation de sortie par rapport à la terre pour une voie, ajoutez la tension d'excitation maximale au potentiel maximal sur la broche 3. Les tensions d'excitation maximales sont de 2 V +3% et 3,3 V +3% pour les excitations de pont, 12 V +5% pour l'excitation +12 V, et 22 V pour l'excitation IEPE.

NI-9218 with LEMO Safety Voltages

Connect only voltages that are within the following limits:

Maximum voltage, from any pin to any pin on a single connector[14]14 The maximum voltage between pin 2 and pin 3 on a single connector is -20 V to +30 V.

±30 V

Isolation
Channel-to-channel, channel-to-Vsup, channel-to-earth, Vsup-to-earth (up to 5,000 m)[15]15 Must use crimp contact LEMO plug (784162-01) to maintain these ratings. Ratings are invalidated if solder version is used.

Continuous

60 V DC, Measurement Category I

Withstand

1,000 V RMS, verified by a 5 s dielectric withstand test

NI-9218 with DSUB Safety Voltages

Connect only voltages that are within the following limits:

Maximum voltage, from any pin to any pin on a single connector[16]16 The maximum voltage between pin 2 and pin 3 on a single connector is -20 V to +30 V.

±30 V

Isolation
Channel-to-channel, channel-to-Vsup inputs (up to 5,000 m)

Continuous

60 V DC, Measurement Category I

Withstand

1,000 V RMS, verified by a 5 s dielectric withstand test

Channel-to-earth ground (up to 3,000 m)

Continuous

60 V DC, Measurement Category I

Withstand

1,000 V RMS, verified by a 5 s dielectric withstand test

Channel-to-earth ground (up to 5,000 m)

Continuous

60 V DC, Measurement Category I

Withstand

860 V RMS

Vsup inputs-to-earth ground (up to 5,000 m)

Continuous

60 V DC, Measurement Category I

Withstand

1,000 V RMS, verified by a 5 s dielectric withstand test

Measurement Category I

Warning Do not connect the product to signals or use for measurements within Measurement Categories II, III, or IV, or for measurements on MAINs circuits or on circuits derived from Overvoltage Category II, III, or IV which may have transient overvoltages above what the product can withstand. The product must not be connected to circuits that have a maximum voltage above the continuous working voltage, relative to earth or to other channels, or this could damage and defeat the insulation. The product can only withstand transients up to the transient overvoltage rating without breakdown or damage to the insulation. An analysis of the working voltages, loop impedances, temporary overvoltages, and transient overvoltages in the system must be conducted prior to making measurements.
Mise en garde Ne pas connecter le produit à des signaux dans les catégories de mesure II, III ou IV et ne pas l'utiliser pour des mesures dans ces catégories, ou des mesures sur secteur ou sur des circuits dérivés de surtensions de catégorie II, III ou IV pouvant présenter des surtensions transitoires supérieures à ce que le produit peut supporter. Le produit ne doit pas être raccordé à des circuits ayant une tension maximale supérieure à la tension de fonctionnement continu, par rapport à la terre ou à d'autres voies, sous peine d'endommager et de compromettre l'isolation. Le produit peut tomber en panne et son isolation risque d'être endommagée si les tensions transitoires dépassent la surtension transitoire nominale. Une analyse des tensions de fonctionnement, des impédances de boucle, des surtensions temporaires et des surtensions transitoires dans le système doit être effectuée avant de procéder à des mesures.

Measurement Category I is for measurements performed on circuits not directly connected to the electrical distribution system referred to as MAINS voltage. MAINS is a hazardous live electrical supply system that powers equipment. This category is for measurements of voltages from specially protected secondary circuits. Such voltage measurements include signal levels, special equipment, limited-energy parts of equipment, circuits powered by regulated low-voltage sources, and electronics.

Note Measurement Categories CAT I and CAT O are equivalent. These test and measurement circuits are for other circuits not intended for direct connection to the MAINS building installations of Measurement Categories CAT II, CAT III, or CAT IV.

Calibration

You can obtain the calibration certificate and information about calibration services for the NI-9218 at ni.com/calibration.

Calibration interval

2 years

1 NI-9218 with LEMO only.

2 Optional sensor excitation.

3 Tie to pin 3.

4 TEDS Class 1 data connection.

5 TEDS Class 2 data connection.

6 Uncalibrated accuracy refers to the accuracy achieved when acquiring in raw or unscaled modes where the calibration constants stored in the module are not applied to the data.

7 Uncalibrated accuracy refers to the accuracy achieved when acquiring in raw or unscaled modes where the calibration constants stored in the module are not applied to the data.

8 Uncalibrated accuracy refers to the accuracy achieved when acquiring in raw or unscaled modes where the calibration constants stored in the module are not applied to the data.

9 Uncalibrated accuracy refers to the accuracy achieved when acquiring in raw or unscaled modes where the calibration constants stored in the module are not applied to the data.

10 Uncalibrated accuracy refers to the accuracy achieved when acquiring in raw or unscaled modes where the calibration constants stored in the module are not applied to the data.

11 Uncalibrated accuracy refers to the accuracy achieved when acquiring in raw or unscaled modes where the calibration constants stored in the module are not applied to the data.

12 Uncalibrated accuracy refers to the accuracy achieved when acquiring in raw or unscaled modes where the calibration constants stored in the module are not applied to the data.

13 Uncalibrated accuracy refers to the accuracy achieved when acquiring in raw or unscaled modes where the calibration constants stored in the module are not applied to the data.

14 The maximum voltage between pin 2 and pin 3 on a single connector is -20 V to +30 V.

15 Must use crimp contact LEMO plug (784162-01) to maintain these ratings. Ratings are invalidated if solder version is used.

16 The maximum voltage between pin 2 and pin 3 on a single connector is -20 V to +30 V.