NI-9470 Specifications
- Updated2024-11-25
- 7 minute(s) read
NI-9470 Specifications
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-9470 Pinout
Signal | Description |
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COM | Common reference connection for the power supply |
DO- | Digital output return (negative) connection |
DO+ | Digital output source (positive) connection |
Vsup | DC voltage power supply connection |
Output Characteristics
Number of output channels | 8 push-pull | ||||||
Current-sensing inputs | 8 low-side sensing resistors | ||||||
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PWM frequency configuration | Per channel | ||||||
PWM frequency |
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PWM frequency, maximum | 2.048 kHz | ||||||
PWM frequency accuracy | 0.01% | ||||||
Duty cycle range | 0% to 100% | ||||||
Pulse distortion | 430 ns maximum |
Number of Channels | Maximum Current Per Channel |
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Two channels | 3 A |
Four channels | 2.3 A |
All channels | 1.6 A |
Maximum peak current per channel | 3.5 A | ||||||
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Current Readback
Sample rate | Once every PWM cycle |
ADC type | Oversampled SAR |
Readback resolution | 16 bits |
Nominal input range | -0.35 A to 3.5 A |
Measurement Conditions | Percent of Reading (Gain Error) | Percent of Range[1]1 Range = 3.5 A. (Offset Error) |
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Maximum (-40 °C to 70 °C) | 1.36% | 0.571% |
Typical (-40 °C to 70 °C) | 0.652% | 0.174% |
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Integral non-linearity | 0.073% | ||||||
Noise | 200 µA RMS |
Voltage Readback
Sample rate |
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ADC type | Sigma-Delta |
Readback resolution | 11 bits |
Nominal input range | 0 V to 40 V |
Gain accuracy | 1.2% |
Offset accuracy | 200 mV |
Noise | 10 mV RMS |
Temperature Readback
Sample rate |
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ADC type | Sigma-Delta |
Readback resolution | 12 bits |
Nominal measurement input range | -40 °C to 125 °C |
Output Mode Characteristics
Setpoint mode | Per channel | ||||||||||
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Dither
Dither control | Per channel | ||||||
Waveform | Triangle | ||||||
Dither frequency |
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Maximum dither period error[2]2 NI recommends selecting a dither divisor that is a multiple of four to generate an optimal dither triangle wave with zero period error. Other values for the dither divisor will be rounded up to the next multiple of four in generating the dither waveform to ensure there is an even number of points in each quarter section of the triangle waveform. The dither triangle wave slope will differ from an ideal triangle wave, especially at small dither divisor values that are not multiples of four. | 4 PWM cycles | ||||||
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Diagnostics and Protection
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PWM output tristate conditions | Power up, power down, master timebase loss | ||||||||||||||
Reverse polarity protection (Vsup-to-COM) | -30 V |
I/O Wiring
I/O plug type | Molex Ultra-Fit, part number 1722583116 | ||||||
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Wire gauge | 22 AWG to 16 AWG |
Safety Voltages
Connect only voltages that are below these limits.
Vsup-to-COM | 0 V DC to 30 V DC maximum, Measurement Category I | ||||||||||||
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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.
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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External power supply | 5 V to 30 V |
Physical Characteristics
Dimensional Drawings | Visit ni.com/dimensions and search by module number. | ||||||||
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Weight | 140 g (4.9 oz) |
Calibration
Calibration interval | 2 years |
1 Range = 3.5 A.
2 NI recommends selecting a dither divisor that is a multiple of four to generate an optimal dither triangle wave with zero period error. Other values for the dither divisor will be rounded up to the next multiple of four in generating the dither waveform to ensure there is an even number of points in each quarter section of the triangle waveform. The dither triangle wave slope will differ from an ideal triangle wave, especially at small dither divisor values that are not multiples of four.