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NI USB-232/4

4-Port RS232 Interface for USB

  • Compatible with any application that uses COM ports on Windows Vista (32- and 64-bit)/XP/2000 PCs
  • Standard baud rates up to 230.4 kbits/s, 128 B transmit-and-receive FIFOs
  • Four fully functional RS232 ports, including RTS/CTS hardware handshake lines
  • DTE and DCE transceiver modes with automatic transceiver detection eliminates null modem cables
  • Bus-powered, requires no external power; power and TX/RX LEDs, D-Sub 9-pin male connectors
  • Easy programming in NI LabVIEW, NI LabWindows™/CVI, and ANSI C/C++ with NI-VISA API

NI USB-232/4 interfaces transform your Universal Serial Bus (USB) port into four asynchronous serial ports for communication with RS232 serial devices. USB-232/4 ports use the NI-Serial driver to work as standard serial ports in any Windows application. NI-Serial also includes the NI-VISA API for accessing advanced serial port features and writing interface-independent code that is compatible with any interface that supports Virtual Instrument Software Architecture (VISA).

The mark LabWindows is used under a license from Microsoft Corporation. Windows is a registered trademark of Microsoft Corporation in the United States and other countries.

Step 1: Verify Device and Quantity Selection
Part
Number
Description Est Ship Days Glossary Definition US Dollars
(change)
Qty
778473-04 NI USB-232/4 12 - 20 $ 399
Step 2: Select Optional Accessories
Part
Number
Description Est Ship Days Glossary Definition US Dollars
(change)
Qty
Shielded Cables
182238-01 RS232 Null Modem Cable (1m) 5 - 10 $ 25
182238-02 RS232 Null Modem Cable (2m) 5 - 10 $ 30
182238-04 RS232 Null Modem Cable (4m) 5 - 10 $ 35
183045-01 RS232 Straight Through Cable (1m) 5 - 10 $ 25
183045-02 RS232 Straight Through Cable (2m) 5 - 10 $ 30
183045-04 RS232 Straight Through Cable (4m) 5 - 10 $ 35
Step 3: Add to Cart or Get a Quote

Guarantee your price for 30 days with an NI Instant Quote (learn more)

You have selected United States as the country where you will use the product(s) (change).

Specifications Documents


Specifications Summary

General
Product Name USB-232/4
Product Family Serial
Form Factor USB
Operating System/Target Windows
LabVIEW RT Support No
Voltage 5.0 V
Current 300.0 mA
Source Internally Powered
Serial Standard Compatibility RS-232
Port Information
Number of Ports 4
Max Cable Length 15.600 m
I/O FIFO Buffer Size 128.0 B
Max Device Connections / Port 1
Handles RTS/CTS Handshake Lines Yes
Direct Memory Access (DMA) No
Physical Specifications
Length 21.080 cm
Width 12.450 cm
Height 3.560 cm
I/O Connector 9-pin D-Sub (DB-9)
Minimum Operating Temperature 0.0 °C
Maximum Operating Temperature 70.0 °C

Extended Warranties

National Instruments designs and manufactures all products to minimize failures, however unexpected failures can still occur. Extended warranties provide a fixed economical price at the time of system purchase, covering any repair costs for up to three years. In addition, they offer the following benefits:

  • Significant cost savings compared to individual repair incidents
  • Fault location, diagnostics, and repair by NI any time the system product fails
  • All parts and labor costs covered as well as any adjustments needed to restore the hardware to manufacturing specifications

For more information about your warranty options:

Calibration

NI recognizes the need to maintain properly calibrated devices for high-accuracy measurements. NI provides manual calibration procedures, services to recalibrate your products, and automated calibration software to calibrate many NI measurement products.

Training

NI training is the fastest, most certain route to productivity with NI tools and successful application development.

Repair Services

Return your registered product under warranty at no additional labor and parts cost. NI offers fault location, diagnostics, and repair any time the system fails as well as any adjustments needed to restore the hardware to manufacturing specifications.

Technical Support

ni.com/support

Select from the following compatible software for the NI USB-232/4.

Graphical Programming Text-Based Programming
Option 1: Select a complete suite of software
Part
Number
Description Est Ship Days Glossary Definition US Dollars
(change)
Qty
DS410836 NI Developer Suite Core (English)
NI Recommended
  $ 4,699

Guarantee your price for 30 days with an NI Instant Quote (learn more)

You have selected United States as the country where you will use the product(s) (change).

Option 2: Select any of the following software products
Part
Number
Description Est Ship Days Glossary Definition US Dollars
(change)
Qty
776670-35 NI LabVIEW Full Development System for Windows (English) 5 - 10 $ 2,599

Guarantee your price for 30 days with an NI Instant Quote (learn more)

You have selected United States as the country where you will use the product(s) (change).

Option 1: Select a complete suite of software
Part
Number
Description Est Ship Days Glossary Definition US Dollars
(change)
Qty
DS410836 NI Developer Suite Core (English)
NI Recommended
  $ 4,699

Guarantee your price for 30 days with an NI Instant Quote (learn more)

You have selected United States as the country where you will use the product(s) (change).

Option 2: Select any of the following software products
Part
Number
Description Est Ship Days Glossary Definition US Dollars
(change)
Qty
776800-35 LabWindows/CVI Full Development System for Windows 5 - 10 $ 2,599

Guarantee your price for 30 days with an NI Instant Quote (learn more)

You have selected United States as the country where you will use the product(s) (change).


Driver Software