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PXI多功能I/O模块提供多种不同的I/O，具有不同的通道数、采样率和输出速率，不同型号之间还具有的定时、触发和同步。该模块适用于实验室研究、设计验证测试和制造测试等工业应用。PXI多功能I/O模块还具有NI-DAQmx驱动程序和配置实用程序，可简化配置和测量。NI-DAQmx支持NI编程环境以及Python、ANSI C、C#.NET和MathWorks MATLAB®软件。

DEVICE SPECIFICATIONS

NI 6230

M Series Data Acquisition: 16-Bit, 250 kS/s, 8 AI, 4 AO, 6 DI, 4 DO,

Voltage Input/Output, Bank Isolation

The following specifications are typical at 25 °C, unless otherwise noted. For more

information about the NI 6230, refer to the NI 6230 User Manual available at ni.com/manuals.

Analog Input

Number of channels

4 differential or 8 single ended

Channel type

Voltage input

ADC resolution

16 bits

DNL

No missing codes guaranteed

INL

Refer to the AI Absolute Accuracy section

Sample rate

Single channel maximum

250 kS/s

Minimum

0 S/s

Timing resolution

50 ns

Timing accuracy

50 ppm of sample rate

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)

Device on

±25 V for up to two AI pins

Device off

±15 V for up to two AI pins

Input current during overvoltage condition

±20 mA maximum/AI pin

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