NI-9218 Specifications
- Updated2024-11-19
- 18 minute(s) read
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
Mode | Pin | |||||||||
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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. |
Signal | Description |
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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 | ||||||
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±16 V Characteristics
Input coupling | DC | ||||||
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Measurement Conditions | Gain Error | Offset Error | |
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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 | ||||||||||||||||
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Input impedance | 390 kΩ | ||||||||||||||||
Input bandwidth, -3 dB | 0.49 f s | ||||||||||||||||
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Phase non-linearity, DC-20 kHz | 0.30° | ||||||||||||||||
Input delay | (40 + [5/512])/fs + 5.3 μs | ||||||||||||||||
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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 | ||||||||||||||||
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CMRR, 60 Hz 1 V RMS-to-earth ground | -120 dBFS | ||||||||||||||||
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±65 mV Characteristics
Input coupling | DC | ||||||
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Measurement Conditions | Gain Error | Offset Error | |
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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 | ||||||||||||||||
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Input impedance | >10 MΩ | ||||||||||||||||
Input bandwidth, -3 dB | 0.49 fs | ||||||||||||||||
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Phase non-linearity, DC-20 kHz | 0.2° | ||||||||||||||||
Input delay | (40 + [5/512])/fs + 3.9 μs | ||||||||||||||||
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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 | ||||||||||||||||
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CMRR, 60 Hz, 1 V RMS-to-earth ground | -133 dBFS | ||||||||||||||||
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Full-Bridge Characteristics
Input coupling | DC | ||||||
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Measurement Conditions | Gain | Offset | |||
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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 | ||||||
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Excitation Voltage | Sample Rate | ||
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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 | ||||||
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Phase non-linearity, DC-20 kHz | 0.2° | ||||||
Input delay | (40 + [5/512])/fs + 3.9 μs | ||||||
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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 | ||||||
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CMRR, 60 Hz, 1 V RMS-to-earth ground | -133 dBFS | ||||||
Shunt calibration accuracy | 50 kΩ ±0.2% | ||||||
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IEPE Characteristics
Input coupling | AC | ||||||
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Measurement Conditions | Gain Error | |
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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 | ||||||||
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Input impedance | 300 kΩ | ||||||||
Input bandwidth, -3 dB | 0.49 fs | ||||||||
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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 | ||||||||
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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 | ||||||||
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CMRR, 60 Hz, 1 V RMS-to-earth ground | -122 dBFS | ||||||||
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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.
where
±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 | ||||||
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Measurement Conditions | Gain Error | Offset Error | |
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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 | ||||||||||||||||
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Input impedance | 45 Ω ±30% | ||||||||||||||||
Input bandwidth, -3 dB | 0.49 fs | ||||||||||||||||
Input delay | (40 + [5/512])/fs + 3.9 μs | ||||||||||||||||
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Alias-free bandwidth | 0.45 fs | ||||||||||||||||
Oversample rate | 64 fs | ||||||||||||||||
Rejection at oversample rate (fs = 51.2 kS/s) | 100 dB | ||||||||||||||||
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CMRR, 60 Hz, 1 V RMS-to-earth ground | -99 dBFS | ||||||||||||||||
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±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 | ||||||
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Measurement Conditions | Gain Error | Offset Error | |
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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 | ||||||||
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Input impedance | 1.49 MΩ | ||||||||
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Flatness, DC to 500 Hz, referred to DC, fs ≥ 1.652 kS/s | 0.2 dB | ||||||||
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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 | ||||||||
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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 | ||||||
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Measurement Conditions | Gain | Offset | |||
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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 |
Excitation Voltage | Sample Rate | ||
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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 | ||||||
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Phase non-linearity, DC-20 kHz | 0.2° | ||||||
Input delay | (40 + [5/512])/fs + 3.9 μs | ||||||
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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 | ||||||
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CMRR, 60 Hz, 1 V RMS-to-earth ground | -73 dBFS | ||||||
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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 | ||||||
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Measurement Conditions | Gain | Offset | |||
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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 | ||||||
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Excitation Voltage | Sample Rate | ||
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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 | ||||||
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Phase non-linearity, DC-20 kHz | 0.2° | ||||||
Input delay | (40 + [5/512])/fs + 3.9 μs | ||||||
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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 | ||||||
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CMRR, 60 Hz, 1 V RMS-to-earth ground | -73 dBFS | ||||||
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Environmental Characteristics
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Ingress protection | IP40 | ||||||||||||
Pollution Degree | 2 | ||||||||||||
Maximum altitude | 5,000 m | ||||||||||||
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To meet these shock and vibration specifications, you must panel mount the system.
Power Requirements
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Vsup Power Requirements
Vsup input voltage range | 9 V to 30 V | ||||||
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Physical Characteristics
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Dimensions | Visit ni.com/dimensions and search by module number. |
NI-998x Physical Characteristics
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NI-9218 Safety Voltages
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 | ||||||||||
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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 | ||||||||||||||||||||||||||||||||||
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Measurement Category I
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.
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.
In This Section
- NI-9218 Specifications
- Connector Types
- Definitions
- Conditions
- NI-9218 Pinout
- General Characteristics
- ±16 V Characteristics
- ±65 mV Characteristics
- Full-Bridge Characteristics
- IEPE Characteristics
- ±20 mA Characteristics
- ±60 V Characteristics
- Half-Bridge Mode Characteristics
- Quarter-Bridge Characteristics
- Environmental Characteristics
- Power Requirements
- Physical Characteristics
- NI-9218 Safety Voltages
- Calibration