型号: PXI-6232

产品编号: 779618-01

DEVICE SPECIFICATIONS NI 6232

M Series Data Acquisition: 16-Bit, 250 kS/s, 16 AI, 2 AO, 24 DIO Sourcing, Voltage Input/Output Bank Isolation

The following specifications are typical at 25 °C, unless otherwise noted. For more information about the NI 6232, refer to the NI 6232/6233 User Manual available from ni.com/ manuals.

Analog Input

Number of channels	8 differential or 16 single ended
Channel type	Voltage input
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	±0.2 V, ±1 V, ±5 V, ±10 V
Maximum working voltage for analog inputs	Refer to the Maximum Working Voltage section
CMRR (DC to 60 Hz)	95 dB (with respect to AI GND)
Input impedance
Device on
AI+ to AI GND	>10 GΩ in parallel with 100 pF
AI- to AI GND	>10 GΩ in parallel with 100 pF

Device off

AI+ to AI GND	820 Ω
AI- to AI GND	820 Ω
Input bias current	±100 pA
Crosstalk (at 100 kHz)
Adjacent channels	-75 dB
Non-adjacent channels	-90 dB
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

Overvoltage protection (AI <0..7> with respect to AI GND)

Settling Time for Multichannel Measurements

Accuracy, full-scale step, all ranges
±90 ppm of step (±6 LSB)	4 μs convert interval
±30 ppm of step (±2 LSB)	5 μs convert interval
±15 ppm of step (±1 LSB)	7 μs convert interval

Typical Performance Graphs

Figure 1. Settling Error versus Time for Different Source Impedances

Figure 2. AI Small Signal Bandwidth

Figure 3. AI CMRR to Earth Ground

Figure 4. AI CMRR to AI GND

AI Absolute Accuracy

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 (μVrms)	Absolute Accuracy at Full Scale (μV)	Sensitivity (μV)
10	-10	75	20	57	244	3,100	97.6
5	-5	85	20	60	122	1,620	48.8
1	-1	95	25	79	30	360	12.0
0.2	-0.2	135	80	175	13	112	5.2

Note Sensitivity is the smallest voltage change that can be detected. It is a function of noise.

Gain tempco 25 ppm/°C

Reference tempco	5 ppm/°C
INL error	76 ppm of range

AI Absolute Accuracy Equation

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.

AI Absolute Accuracy Example

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 10 V range, the absolute accuracy at full scale is as follows:

GainError = 75 ppm + 25 ppm · 1 + 5 ppm · 10 = 150 ppm

OffsetError = 20 ppm + 57 ppm · 1 + 76 ppm = 153 ppm

NoiseUncertainty = = 73 µV

AbsoluteAccuracy = 10 V · (GainError) + 10 V · (OffsetError) + NoiseUncertainty = 3,100 µV

Analog Output

Number of channels	2
Channel type	Voltage output
Ground reference	AO GND
DAC resolution	16 bits
DNL	±1 LSB
Monotonicity	16 bit guaranteed
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	±10 V
Output coupling	DC
Output impedance	0.4 Ω
Output current drive	±5 mA
Overdrive protection	±25 V
Overdrive current	10 mA
Power-on state	±20 mV
Power-on glitch	0.25 V peak for 1 ms
Power-off glitch	±100 mV peak for 350 ms
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

Settling time, full-scale step, 6 µs

15 ppm (1 LSB)

Slew rate	15 V/µs
Glitch energy
Magnitude	100 mV
Duration	3 µs

AO Absolute Accuracy

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

Nominal Range

Negative

Full Scale

Residual

Gain Error

(ppm of

Reading)

Gain

Tempco

(ppm/°C)

Residual

Offset

Error (ppm of Range)

Offset

Tempco

(ppm of

Range/°C)

Absolute

Accuracy at Full

Scale (μV)

-10

3,230

Reference tempco

INL error

AO Absolute Accuracy Equation

AbsoluteAccuracy = OutputValue · (GainError) + Range · (OffsetError)

GainError = ResidualGainError + GainTempco · (TempChangeFromLastInternalCal) +

ReferenceTempco · (TempChangeFromLastExternalCal)

OffsetError = ResidualOffsetError + AOOffsetTempco ·

(TempChangeFromLastInternalCal) + INLError

Digital I/O/PFI

Static Characteristics

Number of channels

10 total

Number of input channels

6 (PFI <0..5>/P0.<0..5>)

Number of output channels

Direction control

PFI/Port 0/Port 1 Functionality

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
Digital Input (Port 0) 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 source

The following figure shows PO.<0..5> and PI.<0..3> on the NI 6232 device.

Figure 5. NI 6232 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 (source output)	5 µs
Propagation delay (source output)
Open to close	0.45 µs
Close to open	2.15 µs

General-Purpose Counters/Timers

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.

Phase-Locked Loop (PLL)

Number of PLLs

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

External Digital Triggers

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

Device-to-Device Trigger Bus

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

Power Requirements

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

Physical Characteristics

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	142 g (5.0 oz)
I/O connector	37-pin D-SUB
Calibration
Recommended warm-up time	15 minutes
Calibration interval	1 year

Maximum Working Voltage

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, \|V_a - V_b\|)	≤11 V, Measurement Category I
Digital channel-to-P1.GND or P0.GND (in the following figure, \|V_c - V_d\| or \|V_e - V_f\|)	≤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 V_pkcontinuous. 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 6. NI 6232 Maximum Working Voltage

Environmental

Operating temperature	0 ºC to 55 ºC
Operating humidity	10% RH to 90% RH, noncondensing

Storage temperature -40 ºC to 70 ºC

Storage humidity	5% RH to 95% RH, noncondensing
Maximum altitude	2,000 m
Pollution Degree	2

Indoor use only.

Shock and Vibration (PXI 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 g_rms
Nonoperating	5 Hz to 500 Hz, 2.4 g_rms (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.

Electromagnetic Compatibility

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)

Online Product Certification

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.

Environmental Management

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.

Waste Electrical and Electronic Equipment (WEEE)

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）

中国客户 National Instruments 符合中国电子信息产品中限制使用某些有害物质指令(RoHS)。关于 National Instruments 中国 RoHS 合规性信息，请登录 ni.com/environment/rohs_china。(For information about China RoHS compliance, go to ni.com/environment/rohs_china.)

Device Pinout

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this manual was developed at private expense and is subject to the applicable limited rights and restricted data rights as set forth in FAR 52.227-14, DFAR 252.227-7014, and DFAR 252.227-7015.

375208C-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, |V_a – V_h|, |V_c – V_h|, and |V_e – V_h|.

[3] In the figure, |V_a – V_g|, |V_c – V_g|, and |V_e – V_g|.