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National Instruments · USB

USB-6281 OEM

The NI USB-6281 OEM is a board-level M Series USB data acquisition device with 18-bit analog input, two analog outputs and 24 digital I/O lines. Part 197596-03 is the unenclosed OEM version for system integration.

ManufacturerNational Instruments

ModelUSB-6281 OEM

Part Number197596-03

Product TypeOEM multifunction data acquisition device

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Analog inputs16 single-ended or 8 differential; 18-bit resolution

Maximum input sampling625 kS/s single channel; 500 kS/s multichannel aggregate

Analog outputs2 channels

Digital I/O24 bidirectional lines

Counters/timersTwo 32-bit counters/timers

ConstructionUnenclosed OEM board; USB 2.0 interface

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Overview

Product overview

Key product information and technical features.

The USB-6281 OEM combines analog acquisition, analog output, digital I/O and counter/timer functions in an unenclosed USB device. NI identifies part 197596-03 as the M Series OEM configuration, distinct from the enclosed screw-terminal and mass-termination configurations.

Analog inputs support 16 single-ended or 8 differential channels with selectable bipolar voltage ranges. The maximum acquisition rate is 625 kS/s for one channel or 500 kS/s shared across multiple channels; these are not per-channel simultaneous sampling rates.

18-bit analog-to-digital conversion with selectable input ranges from ±0.1 V to ±10 V.
Two analog output channels alongside 24 bidirectional digital I/O lines.
Correlated digital I/O, analog and digital triggering, and two 32-bit counters/timers.
USB Signal Stream data transfers for analog acquisition.
OEM configuration uses two generic signal connectors rather than the enclosed variants' terminal arrangements.

Verified specifications

Technical data

Verified product specifications.

Host interface	USB 2.0
Analog input channels	16 single-ended or 8 differential
Analog input resolution	18 bit
Maximum single-channel input sample rate	625 kS/s
Maximum multichannel aggregate input sample rate	500 kS/s
Analog input ranges	±0.1, ±0.2, ±0.5, ±1, ±2, ±5, ±10 V
Analog output channels	2 channels
Digital I/O	24 bidirectional lines
Counters/timers	2 counters/timers, 32-bit
Enclosure	Unenclosed OEM configuration

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National Instruments

Manufacturer

USB 2.0 / M Series

Host interface and DAQ family

USB-6281 OEM

Unenclosed multifunction DAQ device, part 197596-03

Mechanical integration

NI provides dimensional drawings and CAD resources specifically indexed to part 197596-03.

Use the 197596-03 OEM drawings when planning mounting and wiring; do not substitute enclosed-version connector layouts.

Manuals & software

Technical resources

Manuals, software and technical resources for this model.

NI USB-6281 Product Page and OEM ConfigurationProduct Page · ni.com

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PCI/PXI/USB-6281 SpecificationsSpecifications · ni.com

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USB-6281 Dimensional Drawings — Includes 197596-03Dimensional Drawings And CAD · ni.com

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OEM Part 197596-03 Mechanical Drawings and CAD ResourcesTechnical resource

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FAQ

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Product-specific answers based on available technical information.

Which part number identifies the USB-6281 OEM configuration?

NI lists 197596-03 as the USB-6281 M Series OEM configuration. This is the unenclosed version with generic OEM signal connections.

Does 625 kS/s apply to every analog input channel?

No. The maximum is 625 kS/s for single-channel acquisition. Multichannel acquisition has a maximum aggregate rate of 500 kS/s shared across the channels being scanned.

Where can I find mechanical information for the OEM board?

NI's USB-6281 dimensional drawings page includes separate PDF, DXF and 3D CAD entries for part 197596-03.