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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 6236

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

Current Input, Voltage Output, Bank Isolation

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

information about the NI 6236, refer to the NI 6236 User Manual available at ni.com/manuals.

Analog Input

Number of channels

4 differential current inputs

Channel type

Current input

ADC resolution

16 bits

DNL

No missing codes guaranteed

INL

Refer to 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 Maximum Working Voltage section

Input impedance under normal operating conditions (AI+ to AI-)

Typical (25 °C)

92 Ω in parallel with 100 pF

Maximum (55 °C)

110 Ω in parallel with 100 pF

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 x+ or AI x- 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

Overvoltage protection (AI x+ to AI x-)

±20 V maximum

Overcurrent protection

±40 mA maximum1

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