产品编号: 779626-01
DEVICE SPECIFICATIONS NI 6239
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M Series Data Acquisition: 16-Bit, 250 kS/s, 8 AI, 2 AO, 24 DIO Sinking, Current Input/Output Bank Isolation
The following specifications are typical at 25 °C, unless otherwise noted. For more information about the NI 6239, refer to the NI 6238/6239 User Manual available from ni.com/ manuals.
Number of channels | 8 differential current inputs |
Ground reference | AI GND |
ADC resolution | 16 bits |
DNL | No missing codes guaranteed |
INL | Refer to the AI Absolute Accuracy section |
Sample rate | |
Maximum | 250 kS/s |
Minimum | No minimum |
Timing accuracy | 50 ppm of sample rate |
Timing resolution | 50 ns |
Input coupling | DC |
Input range | ±20 mA |
Maximum working voltage for analog inputs | Refer to the Maximum Working Voltage section |
Input impedance (AI+ to AI-) | 92 Ω ±10% in parallel with 100 pF |
Maximum input impedance | 100 Ω (at 55 °C) |
Input bias current | ±100 pA |
Small signal bandwidth (-3 dB) | 700 kHz |
Input FIFO size | 4,095 samples |
Scan list memory | 4,095 entries |
Data transfers DMA (scatter-gather), interrupts, programmed I/O
Figure 1. AI Small Signal Bandwidth
1 Any voltage applied resulting in current flowing above 40 mA can damage the device permanently. 2 This overvoltage protection triggers after the overcurrent protection is in effect.
Figure 2. AI CMRR to Earth Ground
Note Accuracies listed are valid for up to one year from the device external calibration.
Table 1. AI Absolute Accuracy
Nominal Range Positive Full Scale | Nominal Range Negative Full Scale | Residual Gain Error (ppm of Reading) | Residual Offset Error (ppm of Range) | Offset Tempco (ppm of Range/°C) | Random Noise, σ (μArms) | Absolute Accuracy at Full Scale (μA) | Sensitivity (μA) |
0.02 | -0.02 | 595 | 100 | 79 | 0.6 | 18.9 | 0.24 |
Note Sensitivity is the smallest current change that can be detected. It is a function of noise.
Gain tempco 35 ppm/°C
Reference tempco | 5 ppm/°C |
INL error | 76 ppm of range |
AbsoluteAccuracy = Reading · (GainError) + Range · (OffsetError) + NoiseUncertainty
GainError = ResidualAIGainError + GainTempco · (TempChangeFromLastInternalCal)
+ ReferenceTempco · (TempChangeFromLastExternalCal)
OffsetError = ResidualAIOffsetError + OffsetTempco ·
(TempChangeFromLastInternalCal) + INLError
Random Noise ⋅ 3
NoiseUncertainty = for a coverage factor of 3 σ and averaging
100 points.
Absolute accuracy at full scale on the analog input channels is determined using the following assumptions:
• TempChangeFromLastExternalCal = 10 °C
• TempChangeFromLastInternalCal = 1 °C
• number_of_readings = 100
• CoverageFactor = 3 σ
For example, on the 20 mA range, the absolute accuracy at full scale is as follows:
GainError = 595 ppm + 35 ppm · 1 + 5 ppm · 10 = 680 ppm
OffsetError = 100 ppm + 79 ppm · 1 + 76 ppm = 255 ppm
NoiseUncertainty = = .18 µA
AbsoluteAccuracy = 20 mA · (GainError) + 20 mA · (OffsetError) + NoiseUncertainty =
18.9 µA
Number of channels | 2 current outputs |
Ground reference | AO GND |
DAC resolution | 16 bits |
Maximum update rate | |
1 channel | 500 kS/s |
2 channels | 450 kS/s per channel |
Timing accuracy | 50 ppm of sample rate |
Timing resolution | 50 ns |
Output range | 0 mA to 20 mA |
Output coupling | DC |
Power-on state | 0 mA |
Power-on glitch | None |
Output FIFO size | 8,191 samples shared among channels used |
Data transfers DMA (scatter-gather), interrupts, programmed I/O
AO waveform modes | Non-periodic waveform, periodic waveform regeneration mode from onboard FIFO, periodic waveform regeneration from host buffer including dynamic update |
External power supply | 10 VDC to 30 VDC, refer to the figure |
External power supply consumption | 50 mA maximum, refer to the figure |
Internal voltage drop | 3 V maximum, refer to the figure |
Maximum resistive load | Up to 1 kΩ with 24 V power supply connected; refer to the figure |
Figure 3. Analog Output
Protection Open and short circuit
Slew rate
Absolute accuracy at full-scale numbers is valid immediately following internal calibration and assumes the device is operating within 10 °C of the last external calibration.
Note Accuracies listed are valid for up to one year from the device external calibration.
Table 2. AO Absolute Accuracy
Nominal Range Positive Full Scale (A) | Nominal Range Negative Full Scale (A) | Residual Gain Error (% of Reading) | Gain Tempco (ppm/°C) | Residual Offset Error (ppm of Range) | Offset Tempco (ppm of Range/°C) | Absolute Accuracy at Full Scale (μA) |
0.02 | 0 | 0.1570 | 20 | 0.0537 | 8 | 52.3 |
Reference tempco 5 ppm/°C
INL error | 128 ppm of range |
Random noise | 2 μA |
AbsoluteAccuracy = OutputValue · (GainError) + Range · (OffsetError)
GainError = ResidualGainError + GainTempco · (TempChangeFromLastInternalCal) +
ReferenceTempco · (TempChangeFromLastExternalCal)
OffsetError = ResidualOffsetError + AOOffsetTempco ·
(TempChangeFromLastInternalCal) + INLError
Static Characteristics | |
Number of channels | 10 total |
Number of input channels | 6 (PFI <0..5>/P0.<0..5>) |
Number of output channels | 4 (PFI <6..9>/P1.<0..3>) |
Direction control | Fixed, lines are unidirectional |
PFI <0..5>/P0.<0..5> | Static digital input, timing input |
PFI <6..9>/P1.<0..3> | Static digital output, timing output |
Timing output sources | Many AI, AO, counter timing signals |
Debounce filter settings | 125 ns, 6.425 µs, 2.56 ms, disable; high and low transitions; selectable per input |
Number of channels | 6 |
Ground reference | P0.GND |
Input voltage range | 0 V to 30 V |
Minimum pulse width for timing signal | 0.5 μs |
Logic "0" level | 0 V to 4 V |
Logic "1" level | 10 V to 30 V |
Minimum input impedance | 3.3 kΩ |
Typical input current | 7 mA at 24 V input, 2.5 mA at 8 V input |
Maximum input current | 9 mA |
Propagation delay | |
Low to high | 150 ns, typical |
High to low | 100 ns, typical |
Digital Output (Port 1) | |
Number of channels | 4 |
Ground reference | P1.GND |
Device output type | DO sink |
The following figure shows PO.<0..5> and PI.<0..3> on the NI 6239 device.
Figure 4. NI 6239 Digital I/O Connections
Maximum external supply voltage 30 V
(P1.VCC)
On state saturation voltage | 1.6 V maximum at 350 mA |
Off state leakage | 50 µA |
Maximum current | 100 mA for each line for simultaneous usage, 350 mA for single line usage |
Minimum pulse width for timing signal (sink output) | 1.25 µs |
Propagation delay (sink output) | |
Open to close | 0.4 µs |
Close to open | 0.4 µs |
Number of counter/timers | 2 |
Resolution | 32 bits |
Counter measurements | Edge counting, pulse, semi-period, period, two-edge separation |
Position measurements X1, X2, X4 quadrature encoding with
Channel Z reloading; two-pulse encoding
Output applications | Pulse, pulse train with dynamic updates, frequency division, equivalent time sampling |
Internal base clocks | 80 MHz, 20 MHz, 0.1 MHz |
External base clock frequency | 0 MHz to 20 MHz |
Base clock accuracy | 50 ppm |
Inputs | Gate, Source, HW_Arm, Aux, A, B, Z, Up_Down |
Routing options for inputs | Any input PFI, RTSI, PXI_TRIG, PXI_STAR, many internal signals |
FIFO | 2 samples |
Data transfers | Dedicated scatter-gather DMA controller for each counter/timer; interrupts; programmed I/O |
Frequency Generator | |
Number of channels | 1 |
Base clocks | 10 MHz, 100 kHz |
Divisors | 1 to 16 |
Base clock accuracy | 50 ppm |
Output can be available on any output PFI or RTSI terminal.
Number of PLLs | 1 |
Reference signal | PXI_STAR, PXI_CLK10, RTSI <0..7> |
Output of PLL | 80 MHz Timebase; other signals derived from 80 MHz Timebase including 20 MHz and 100 kHz Timebases |
Source | Any PFI, RTSI, PXI_TRIG, PXI_STAR |
Polarity | Software-selectable for most signals |
Analog input function Start Trigger, Reference Trigger,
Pause Trigger, Sample Clock, Convert Clock,
Sample Clock Timebase
Analog output function | Start Trigger, Pause Trigger, Sample Clock, Sample Clock Timebase |
Counter/timer function | Gate, Source, HW_Arm, Aux, A, B, Z, Up_Down |
PCI RTSI <0..7>[1]
PXI | PXI_TRIG <0..7>, PXI_STAR |
Output selections | 10 MHz Reference Clock, frequency generator output, many internal signals |
Debounce filter settings | 125 ns, 6.425 μs, 2.56 ms, disable; high and low transitions; selectable per input |
Bus Interface | |
PCI/PXI | 3.3 V or 5 V signal environment |
The PXI device can be installed in PXI slots or PXI Express hybrid slots.
DMA channels 4, analog input, analog output, counter/timer 0, counter/timer 1
Current draw from bus during no-load condition
+5 V | 0.7 A |
+12 V | 20 mA |
Current draw from bus during AI and AO overvoltage condition
+5 V | 0.95 A |
+12 V | 20 mA |
Dimensions | |
PCI printed circuit board | 9.7 cm × 15.5 cm (3.8 in. × 6.1 in.) |
PXI printed circuit board | Standard 3U PXI |
Weight | |
PCI | 103 g (3.6 oz) |
PXI | 144 g (5.1 oz) |
I/O connector | 37-pin D-SUB |
Calibration | |
Recommended warm-up time | 15 minutes |
Calibration interval | 1 year |
Maximum working voltage refers to the signal voltage plus the common-mode voltage.
Channel-to-earth ground[2] | |
dielectric withstand test | |
Channel-to-bus[3] | |
dielectric withstand test | |
Analog channel-to-AI GND or AO GND (in the following figure, |Va - Vb|) | ≤11 V, Measurement Category I |
Digital channel-to-P1.GND or P0.GND (in the following figure, |Vc - Vd| or |Ve - Vf|) | ≤30 V, 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 lowvoltage sources, and electronics.
Caution This device is rated for Measurement Category I and the voltage across the isolation barrier is limited to no greater than 30 Vrms/60 VDC/42.4 Vpk continuous. These test and measurement circuits are not intended for direct connection to the MAINS building installations of Measurement Categories CAT II, CAT III, or CAT IV.
The following figure illustrates the maximum working voltage specifications. Figure 5. NI 6239 Maximum Working Voltage
Operating temperature | 0 ºC to 55 ºC |
Storage temperature | -20 ºC to 70 ºC |
Humidity 10% RH to 90% RH, noncondensing
Maximum altitude | 2,000 m |
Pollution Degree (indoor use only) | 2 |
Indoor use only.
Operational shock | 30 g peak, half-sine, 11 ms pulse (Tested in accordance with IEC 60068-2-27. Test profile developed in accordance with MIL-PRF-28800F.) |
Random vibration | |
Operating | 5 Hz to 500 Hz, 0.3 grms |
Nonoperating | 5 Hz to 500 Hz, 2.4 grms (Tested in accordance with IEC 60068-2-64. Nonoperating test profile exceeds the requirements of MIL-PRF-28800F, Class 3.) |
Safety |
This product is designed to meet the requirements of the following electrical equipment safety standards for measurement, control, and laboratory use:
• IEC 61010-1, EN 61010-1
• UL 61010-1, CSA 61010-1
Note For UL and other safety certifications, refer to the product label or the Online Product Certification section.
This product meets the requirements of the following EMC standards for electrical equipment for measurement, control, and laboratory use:
• EN 61326-1 (IEC 61326-1): Class A emissions; Basic immunity
• EN 55011 (CISPR 11): Group 1, Class A emissions
• EN 55022 (CISPR 22): Class A emissions
• EN 55024 (CISPR 24): Immunity
• AS/NZS CISPR 11: Group 1, Class A emissions
• AS/NZS CISPR 22: Class A emissions
• FCC 47 CFR Part 15B: Class A emissions
• ICES-001: Class A emissions
Note In the United States (per FCC 47 CFR), Class A equipment is intended for use in commercial, light-industrial, and heavy-industrial locations. In Europe, Canada, Australia and New Zealand (per CISPR 11) Class A equipment is intended for use only in heavy-industrial locations.
Note Group 1 equipment (per CISPR 11) is any industrial, scientific, or medical equipment that does not intentionally generate radio frequency energy for the treatment of material or inspection/analysis purposes.
Note For EMC declarations and certifications, and additional information, refer to the Online Product Certification section.
This product meets the essential requirements of applicable European Directives, as follows:
• 2014/35/EU; Low-Voltage Directive (safety)
• 2014/30/EU; Electromagnetic Compatibility Directive (EMC)
• 2011/65/EU; Restriction of Hazardous Substances (RoHS)
Refer to the product Declaration of Conformity (DoC) for additional regulatory compliance information. To obtain product certifications and the DoC for this product, visit ni.com/ certification, search by model number or product line, and click the appropriate link in the Certification column.
NI is committed to designing and manufacturing products in an environmentally responsible manner. NI recognizes that eliminating certain hazardous substances from our products is beneficial to the environment and to NI customers.
For additional environmental information, refer to the Minimize Our Environmental Impact web page at ni.com/environment. This page contains the environmental regulations and directives with which NI complies, as well as other environmental information not included in this document.
EU Customers At the end of the product life cycle, all NI products must be disposed of according to local laws and regulations. For more information about how to recycle NI products in your region, visit ni.com/environment/weee. 电子信息产品污染控制管理办法（中国RoHS）
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375211C-01 Jun16
[1] In other sections of this document, RTSI refers to RTSI <0..7> for the PCI devices or PXI_TRIG <0..7> for PXI devices.
[2] In the figure, |Va – Vh|, |Vc – Vh|, and |Ve – Vh|.
[3] In the figure, |Va – Vg|, |Vc – Vg|, and |Ve – Vg|.